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七年级上册语文周测一试卷及答案

七年级上册语文周测一试卷及答案

七年级上册语文周测一班级:姓名:分数:__________一、基础(23分)1.根据课文默写古诗文。

(8分)自古以来,山河湖海、风云日月都成为了诗人笔下诗意的源头。

曹操在《观沧海》一诗中用①“□□□□,□□□□。

”描绘大海水波动荡,山岛高耸突兀的美景;李益在《夜上受降城闻笛》中用②“□□□□□□□,受降城外月如霜。

”描绘了边塞荒凉凄冷的环境;李白在《闻王昌龄左迁龙标遥有此寄》中用③“□□□□□□□,□□□□□□□。

”借柳絮和杜鹃表达飘零之感、迁谪之远。

王湾在《次北固山下》用④“□□□□□,□□□□□。

”描绘夜未消尽,红日从海上升起的画面,表现时序变迁、新旧交替。

马致远在《天净沙·秋思》中用⑤“□□□□,断肠人在天涯。

”借夕阳西下之景直接表达了游子思乡之情。

2. 根据拼音写出相应的词语。

(3分)我侧耳倾听之时,多么动听啊,鸟儿尽情鸣叫,却不显得duō duō bī rén ()。

我静静地听着,顿悟春之草木,顿悟林间之鸟。

它们都自在于这个宁静的世界,或静立其中,或hū péng yǐn bàn (),幸福快乐在它们的世界里……春天像小姑娘, huāzhīzhāo zhǎn()的,笑着,走着。

3.下列句中加横线词语使用不恰当的一项是()(3分)A. 热烈欢迎上级领导莅临我校指导工作。

B. 在正式表演前,他在后台酝酿了下情绪,做好了充分的演出准备。

C. 听说明天就能收到录取通知书,他翻来覆去睡不着。

D. 这两本成语词典各得其所,一本重视溯源,一本例句丰富,特色都很鲜明。

4.下列句中加横线词语运用不恰当的一项是()(3分)A.他一个人自得自乐地走在公园里,心情愉悦,享受着天伦之乐。

B.看到我打碎了他心爱的瓷器,他怒不可遏。

C.“真是无与伦比的美呀!”游客看着眼前的美景纷纷赞叹。

D. 我很有自知之明,知道这一关是过不了的啦。

5.下列句子没有语病的一项()(3分)A.三个小学的校长正在办公室开会。

湖北省武汉市部分学校2018-2019学年度八年级数学(上)第11章《三角形》周测(一)(含答案)

湖北省武汉市部分学校2018-2019学年度八年级数学(上)第11章《三角形》周测(一)(含答案)

八年级数学(上)第11章《三角形》周测(一)(考试范围:11.1与三角有关的线段~11.2与三角形有关的角 参考时间:90分钟,满分:120分)一、选择题(每小题3分,共30分)1.下列图形中,作△ABC 中AC 边上的高正确的是( )DCB AA BCEABCEA BCEECBA2.下列各组数据中,能构成三角形的是( ) A .1cm 、2cm 、3cm B .2cm 、3cm 、4cm C .4cm 、9cm 、4cmD .2cm 、1cm 、4cm 3.下列图形中具有稳定性的是( )A .正三角形B .正方形C .正五边形D .正六边形 4.在△ABC 中,∠A ∶∠B ∶∠C =3∶4∶5,则△ABC 为( )A .直角三角形B .锐角三角形C .钝角三角形D .等腰三角形 5.能够把三角形的面积分成相等的两份的线段是( )A .角平分线B .高C .中线D .以上都不是 6.如图,△ABC 中,∠A =30°,点D 为AB 延长线上一点,且∠CBD =130°,则∠C =( ) A .40°B .60°C .80°D .100° 7.在△ABC 中,∠A +∠B =∠C ,则下列结论中不一定成立的是( ) A .∠A 与∠B 互余 B .∠C =90°C .∠B >45°D .△ABC 为直角三角形 8.如图,BD 平分∠ABC ,CD ⊥BD ,D 为垂足,∠C =55°,则∠ABC 的度数是( )A .35°B .55°C .60°D .70°DCABDC AB2x°+20°AB CD第6题图第8题图 第9题图 9.如图,在△ABC 中,∠C =70°,∠B =x °,外角∠DAC =2x °+20°,则∠BAC 的度数为( ) A .50°B .60°C .70°D .80°10.周长为27的三角形中,最短边长为x ,另有一边长为(2x -5),则x 的取值范围是( ) A .5≤x ≤8B .5≤x <374C .376<x <374D .376<x ≤8 二、填空题(每小题3分,共18分)11.三角形的两边为2和4,则第三边a 的取值范围是 .12.等腰三角形的两条边长分别为3cm ,7cm ,则等腰三角形的周长为 cm .13.如图,CE 是△ABC 的外角∠ACD 的平分线,若∠B =35°,∠ACE =60°,则∠A = .35°60°ABCDEP21ABC BACE D第13题图第14题图第16题图14.如图,在△ABC 中,∠ACB =86°,若P 为△ABC 内一点,且∠1=∠2,则∠BPC = . 15.三角形的三个内角的比为1∶3∶5,它的三个外角的比为 .16.如图,△ABC 中,D 是AC 边上一点,BE 平分∠ABD ,∠A =(2x +10)°,∠BDC =(150-2x )°,则∠BEC 的度数为 .三、解答题(共8题,共72分)17.(本题8分)如图,在△ABC 中,AE 是中线,AD 是角平分线,AF 是高,填空:(1)BE = =12; (2)∠BAD = =12; (3)∠AFB = =90°;(4)AECS= .18.(本题8分)在△ABC 中,若∠A =12∠B =13∠C ,试判断这个三角形的形状.19.(本题8分)如图,∠B =30°,∠ACE =35°,CE 平分∠ACB ,求∠A 的度数.BA CE20.(本题8分)如图,CE 是△ABC 外角∠BCD 的平分线,CE ∥AB ,求证:∠A =∠B .FBACE DAEBCD21.(本题8分)在△ABC 中,AD ⊥BC ,BE 平分∠ABC 交AD 于F ,交AC 于E ,∠ABE =23°.求∠AFE 的度数.FDAE BC22.(本题10分)如图,△ABC 的周长为11,AD 为中线,△ABD 的周长为8,△ACD 的周长为7,求AD 的长.ABDC23.(本題10分)如图,在△ABC 中,∠BAC 的平分线交BC 于点D .(1)如图1,若∠B =68°,∠C =32°,AE ⊥BC 于点E ,∠EAD 的度数为 ;(2)如图2,若点F 是AD 延长线上的一点,∠BAF ,∠BDF 的平分线交于点G ,∠B =x °,∠C =y °(x >y ),求∠G 的度数.图1ABDCE图2ABDCGF24.(本題12分)如图1,点A ,B 分別为x 轴正半轴和y 轴正半轴上的两个定点,点C 为x 轴上的一个动点(与点O ,A 不重合)、分別作∠OBC 和∠ACB 的角平分线,两角平分线所在直线交于点E . (1)当点C 在x 轴的负半轴上运动时,∠BEC 的度数为 ;(2)当点C 在x 轴的正半轴上运动时,直接写出∠BEC 的度数及点C 所在的相应位置;(3)如图2,△FGH 的一个顶点F 在y 轴的负半轴上,射线FO 平分∠GFH ,过点H 的直线MN 交x 轴于点M ,満足∠MHF =∠GHN ,过点H 作HP ⊥MN 交x 轴于点P ,请探究∠MPH 与∠G 的数量关系.yx图1ABOyx 图1备用图ABO yxPNMH F图2OB G1-5ABABC 6-10DCDBD 11.2<a <6 12.17 13.85° 14.94° 15. 4∶3∶2 16. 80° 17.(1)BE = CE =12BC ; (2)∠BAD = ∠CAD =12∠BAC ; (3)∠AFB = ∠AFC =90°;(4)AECS = AEBS.18. 直角三角形.19解:80°. 20解:∠AFE =67° 21.解:∠AFE =67° 22.解:AD =2. 23.解:(1)18°;(2)∵∠B =x °,∠C =y °,∴∠BAC =180°-x °-y °,∵∠BAD =12∠BAC =12(180°-x °-y °),∠BAG =12∠BAD =14(180°-x °-y °),∵∠BDF =∠BAD +∠B ,∴∠G =12∠BDF -∠GAD =12x °. 24.解:(1)当点C 在x 轴负半轴上时,∠BEC =135°;(2)当点C 在OA 的延长线上时,∠BEC =135°;当点C 在线段OA 上(且与点O ,A 不重合)时,∠BEC =45°; (3)∠MPH 与∠G 的数量关系为:∠MPH =12∠G .提示:∠MPH =∠HOF -90°,∠HOF =90°+12∠G ,∴∠MPH =12G .。

九年级上册数学周测题(1)

九年级上册数学周测题(1)

周测一: 一元二次方程的解法(21.1-21.2)班级 姓名 总分一、选择题(每小题4分,共24分)1. 下列方程中属于一元二次方程的是( )A. 25(1)x x x x +=-B. 23x 520xy +-=C. 21x 2x-= D. 26x 710x -+= 2. 方程03562=+-x x 的一次项系数是( )A. 6B. 5C. -5D. 33. 若方程0243=-++x mx m 是关于x 的一元二次方程,则该方程的二次项系数是( )1-.A 2.B 1.C 4.D4. 方程0122=+-x x 的解是( )A. x=1B. x 1=1,x 2=-1C. x 1=x 2=1D. x 1=1,x 2=05.用配方法解方程0142=-+x x ,配方后的方程是( )5)2.(2=-x A 1)2.(2-=+x B 5)2.(2=+x C 1)4.(2=+x D6.一元二次方程方程2432-=-x x x 根的情况是( )A.有两个相等的实数根B.有两个不相等的实数根C.没有实数根D.无法确定二、填空题(每小题4分,共24分)7. 方程2725x x +=的一次项系数是_________.8. 若关于x 的方程0132=-+x kx 有两个相等的实数根,则k 的取值为________.9. 关于x 的方程012)1(2=+-+x x k 有两个不相等的实数根,k 的取值范围是 _____.10. 已知036)1(1=+-++x x a a 是关于x 的一元二次方程,则a 的值为________.11. 将方程0542=+-x x 配方成k h x =+2)(的形式,则k h +的值为_____ __.12.已知关于x 的方程032=++mx x 的一个根是3,则m 的取值为________.三、解下列一元二次方程(共52分)13. (8分)配方法解一元二次方程 2620x x -+=14.解下列一元二次方程(每小题9分,共36分)(1)2100-490x = (2)(7)70x x x -+-=(3)2225y y += (4)225432x x x +=+15.(8分)已知关于x 的方程0242=++a x x 有实数根.(1)求a 的取值范围;(2)当a 取最大整数值时,求该方程的解。

七下语文周测1(答案)

七下语文周测1(答案)

七年级下学期语文周测(一)满分:100分用时:90分钟一.(共24分,每小题3分)1.下列各组词语中,加点字的书写或注音有误的一组是( D )A.选聘.(pìn) 地壳.(qiào)沥.尽心血(lì)群蚁排衙.(yá)B.校.补(jiào)殷.红(yān)气冲斗.牛(dǒu)兀.兀穷年(wù)C.彷.徨(pánɡ) 赫.然(hè) 鲜.为人知(xiǎn)迥.乎不同(jiǒnɡ)D.迭.起(dié) 澎湃.(bài) 锲.而不舍(qì)妇儒.皆知(rú)2.下列词语中,书写完全正确的一项是( B )A.奠基卓越秩序鞠躬尽悴B.选聘谣言伴侣锋芒毕露C.深霄澎湃碗碟深恶痛绝D.抱歉硕果薪金妇儒皆知3.依次填入下面横线处的词语,恰当的一组是( A )中华民族是____的礼仪之邦,自古以来就____“礼治”,将礼义廉耻作为____之本。

礼节、礼貌、礼仪不仅____了一个人的气质风度、阅历见识、道德情操、精神风貌,而且还代表着一个集体、一个城市、一个民族、一个国家的风土人情、诚信程度和对外形象。

A.举世闻名倡导立国反映B.家喻户晓提倡兴国反映C.闻名遐迩倡议治国反应D.驰名中外提倡立国反应4.下列各句中有语病的一项是( C )A.长江流域连续干旱,导致洞庭湖、鄱阳湖水面大面积缩小,给人们的生产和生活带来很大影响。

B.通过开展“全国文明城市”创建活动,我市环境卫生状况有了很大改善。

C.在央视的文化节目《国家宝藏》中,通过明星守护人的讲述,使观众看到了国宝的“前世今生”。

D.中国不仅是“一带一路”建设的倡议者,更是负责任的参与者、有担当的行动者。

5.下列各句标点符号使用不规范的一项是( D )A.安检后要对物品进行检查清点,防止拿错、遗失和被盗现象发生,确认无误后方可离开。

B.刚刚我不是来过了吗?怎么会好久不见?就是上午我来的那次周先生忘记了,可是我也每天来呀……怎么都忘记了吗?C.许广平说鲁迅是个平凡的人,走在街上,无论面貌、身形还是衣着,都不会引起别人的注意。

人教版数学七年级下册第五章《相交线与平行线》周练习含答案

人教版数学七年级下册第五章《相交线与平行线》周练习含答案

人教版数学七年级下册第五章《相交线与平行线》周练习第五章相交线与平行线周周测1一选择题1. 如图:下列四个判断中,正确的个数是().①的内错角只有②的同位角是③的同旁内角是..④图中的同位角共有个A. 个B. 个C. 个D. 个2.如图,已知于点,点..在同一直线上,且,则为().A.B.C.D.3.如图,直线相交于点 ,射线平分 , ,若,则的度数为().A.B.C.D.4.如图,直线.被直线所截,则的同旁内角是()A.B.C.D.5.如图,与是内错角的是()A.B.C.D.6.如图,与是()A. 对顶角B. 同位角C. 内错角D. 同旁内角7.已知两条平行线被第三条直线所截,则以下说法不正确的是()A. 一对同位角的平分线互相平行B. 一对内错角的平分线互相平行C. 一对同旁内角的平分线互相平行D. 一对同旁内角的平分线互相垂直8.如图,直线相交于点,于,若,则不正确的结论是()A.B.C.D.9.如果点在直线上,也在直线上,但不在直线上,且直线..两两相交符合以上条件的图形是()A.B.C.D.10.如图两条非平行的直线被第三条直线所截,交点为,那么这条直线将所在平面分成()A. 个部分B. 个部分C. 个部分D. 个部分11.如图,若两条平行线,与直线,相交,则图中共有同旁内角的对数为()A.B.C.D.12.若点到直线的距离为,点到直线的距离为,则线段的长度为()A.B.C. 或D. 至少13.如图,在平面内,两条直线,相交于点,对于平面内任意一点,若,分别是点到直线,的距离,则称为点的“距离坐标”.根据上述规定,“距离坐标”是的点共有()个.A. 个B. 个C. 个D. 个14.如图,两条直线,交于点,射线是的平分线,若,则等于()A.B.C.D.15.如图,点是直线外的一点,点在直线上,且,垂足是,,则下列不正确的语句是()A. 线段的长是点到直线的距离B. 线段的长是点到直线的距离C. 三条线段中,最短D. 线段的长是点到直线的距离二填空题16.如图,与相交于点,,,则度.17.如图,在菱形中,点是对角线上的点,于点,若,则到的距离为.18.如图,标有角号的个角中共有对内错角,对同位角,对同旁内角.19.四条直线两两相交,至多会有个交点.20.如图,,,,则度.三解答题21.如图,图中共有多少对同位角,多少对内错角,多少对同旁内角.22.如图,用数字标出的八个角中,同位角.内错角.同旁内角分别有哪些?请把它们一一写出来.23.如图,直线..两两相交,射线平分,已知,,求的度数.第五章相交线与平行线周周测1 参考答案与解析一、选择题1.C2.B3.C4.C5.D6.B7.C8.C9.D 10.C 11.D 12.D13.D 解析:依题意,作与l1平行且距离为2的直线两条,作与l2平行且距离为1的直线两条,两组平行线的交点即为所求,共4个点符合题意.14.C 15.B二、填空题16.36 17.3 18.4 2 4 19.6 20.55三、解答题21.解:有6对同位角,4对内错角,4对同旁内角.22.解:同位角:∠2与∠8,∠3与∠7,∠4与∠6;内错角:∠1与∠4,∠2与∠6,∠3与∠5,∠4与∠8,;同旁内角:∠2与∠4,∠2与∠5,∠3与∠6,∠4与∠5.23.解:∵BE平分∠ABD,∠2=75°,∴∠ABE=∠2=75°,∴∠1=180°-∠ABE=∠2=180°-75°-75°=30°.∵∠1=3∠3,∴∠3=25°.∵∠3与∠4是对顶角,∴∠4=∠3=25°.第五章相交线与平行线周周测2一选择题1.如图,已知直线a,b被直线所截,那么的同位角是()A.B.C.D.2. 如图,已知三条直线,,相交于一点,则等于().A. °B. °C. °D. °3.将一副三角板按图中方式叠放,则角的度数是().A.B.C.D.4.如图,下列叙述正确的是().A. 和是内错角B. 和是同位角C. 和是同位角D. 和是同旁内角5.如图,直线,被直线所截,则的同旁内角是()A.B.C.D.6.如图:下列四个判断中,正确的个数是().①的内错角只有②的同位角是③的同旁内角是,,④图中的同位角共有个A. 个B. 个C. 个D. 个7.甲.乙.丙.丁四个学生在判断时钟的分针与时针互相垂直的时,他们每个人都说两个时间,说对的是()A. 丁说时整和时整B. 丙说时整和时分C. 乙说点分和点分D. 甲说时整和点分8.如图,直线相交于点,于,若,则不正确的结论是()A.B.C.D.9.如图,若两条平行线,与直线,相交,则图中共有内错角的对数为()A.B.C.D.10.如图,能表示点到直线的距离的线段共有()A. 条B. 条C. 条D. 条11.在一个平面上任意画条直线,最多可以把平面分成的部分是()A.B.C.D.12.如图,点是直线外的一点,点在直线上,且,垂足是,,则下列不正确的语句是()A. 线段的长是点到直线的距离B. 线段的长是点到直线的距离C. 三条线段中,最短D. 线段的长是点到直线的距离二填空题13.如图,与相交于点,,,则度.14.如图,,于,图中共有_______个直角,图中线段______的长表示点到的距离,线段_________的长表示点到的距离.15.如图,的内错角有个.16.如图,,,,则度.三解答题17.如图,图中共有多少对同位角,多少对内错角,多少对同旁内角.18.如图,用数字标出的八个角中,同位角.内错角.同旁内角分别有哪些?请把它们一一写出来.19.如图,直线,,相交于点,平分,,.求的度数.第五章相交线与平行线周周测2 参考答案与解析一、选择题1.A2.C3.D4.A5.C6.C7.A8.C9.D 10.D 11.C 12.B二、填空题13.36 14.3 CD AC 15.3 16.55三、解答题17.解:有6对同位角,4对内错角,4对同旁内角.18.解:同位角:∠2与∠8,∠3与∠7,∠4与∠6;内错角:∠1与∠4,∠2与∠6,∠3与∠5,∠4与∠8,;同旁内角:∠2与∠4,∠2与∠5,∠3与∠6,∠4与∠5.19.解:∵,,∴∠DOE=180°-∠1-∠2=180°-30°-45°=105°.∵∠DOE与∠COF是对顶角,∴∠COF=105°.∵平分,∴∠3=∠FOG=105°÷2=52.5°.第五章相交线与平行线周周测3一选择题1. 如图,已知∠1=∠2,则下列结论一定成立的是()A.AB//CD B.AD//BC C.∠B=∠D D.∠3=∠42. 下列图形中,能由∠1=∠2得到AB//CD的是()A.B. C.D.3. 如图,能判定的条件是()A.B.C.D.4. 对于图中标记的各角,下列条件能推理得到a∥b的是()A.∠1=∠2 B.∠2=∠4 C.∠3=∠4 D.∠1+∠4=180°5. 如图,下列条件中:(1)∠B+∠BCD=180°;(2)∠1=∠2;(3)∠3=∠4;(4)∠B=∠5.能判定AB∥CD的条件个数有()A.1个B.2个C.3个D.4个6. 如图,下列条件中,不能判断直线∥的是()A.∠1=∠3 B.∠2=∠3 C.∠4=∠5 D.∠2+∠4=180°7. 如图,已知∠1=70°,要使AB∥CD,则须具备另一个条件()A.∠2=70° B.∠2=100° C.∠2=110° D.∠3=110°8. 如图,用两个相同的三角板按照如图方式作平行线,能解释其中道理的定理是()A.同位角相等两直线平行B.同旁内角互补,两直线平行C.内错角相等两直线平行D.平行于同一条直线的两直线平行9. 如图,能判定EC∥AB的条件是()A.∠B=∠ACE B.∠A+∠ACD=180°C.∠ACE=∠DCE D.∠A=∠ACE10. 如图,下列能判定AB∥CD的条件有().(1)∠B+∠BCD=180°;(2)∠1=∠2;(3)∠3=∠4;(4)∠B=∠5.A.1个B.2个C.3个D.4个11. 过一点画已知直线的平行线,则( )A.有且只有一条B.有两条C.不存在D.不存在或只有一条12. 如图,能判断直线AB∥CD的条件是()A.∠1=∠2 B.∠3=∠4 C.∠1+∠3=180 o D.∠3+∠4=180 o二填空题13. 如图,两直线a.b被第三条直线c所截,若∠1=50°,∠2=130°,则直线a.b的位置关系是____________ .14. 在同一平面内,_____________________叫作平行线.15. 如图,直线a、b被直线c所截,若满足,则a、b平行(写出一个即可).16. 已知为平面内三条不同直线,若,,则与的位置关系是.三解答题17. 看图填空:如图,∠1的同位角是,∠1的内错角是,如果∠1=∠BCD,那么,根据是;如果∠ACD=∠EGF,那么,根据是.18. 如图,已知∠1=∠2,AC平分∠DAB,试说明DC∥AB.19.已知:如图,∠A=∠F,∠C=∠D.求证:BD∥CE.20.如图,已知:∠B=∠D+∠E,试说明:AB∥CD.第五章相交线与平行线周周测3 参考答案与解析一、选择题1.B2.D3.D4.D5.C6.B7.C8.C9.D 10. C 11.D 12.D二、填空题13.平行14.不相交的两条直线15.∠1=∠2(答案不唯一)16.平行三、解答题17.∠EFG ∠BCD,∠AED DE∥BC 内错角相等,两直线平行CD∥GF 同位角相等,两直线平行18. 解:∵AC平分∠DAB,,∴∠1=∠CAB.∵∠1=∠2,∴∠CAB=∠2,∴DC∥AB.19. 证明:∵∠A=∠F,∴AC∥DF,∴∠C=∠CEF.∵∠C=∠D,∴∠D=∠CEF,∴BD∥CE.20..解:过点E向右作EM//CD,则∠D=∠DEM.∵∠B=∠D+∠E,第五章相交线与平行线周周测4一选择题1.如图,是我们学过的用直尺和三角尺画平行线的方法示意图,画图的原理是()A.同位角相等,两直线平行B.内错角相等,两直线平行C.两直线平行,同位角相等D.两直线平行,内错角相等12第1题图第2题图第3题图2.如图,梯子的各条横档互相平行,若∠1=70°,则∠2的度数是()A.80°B.110°C.120°D.140°3.如图所示,点E 在AC 的延长线上,下列条件中能判断AB ∥CD 的是( ) A .∠3=∠4B .∠1=∠2C .∠D =∠DCE D .∠D +∠ACD =180°4.一辆汽车在笔直的公路上行驶,两次拐弯后,仍在原来的方向上平行前进,那么两次拐弯的角度是( )A .第一次右拐50°,第二次左拐130°B .第一次左拐50°,第二次右拐130°C .第一次左拐50°,第二次左拐130°D .第一次右拐50°,第二次左拐50° 5.如图,下列说法中,正确的是( ) A .因为∠A +∠D =180°,所以AD ∥BC B .因为∠C +∠D =180°,所以AB ∥CD C .因为∠A +∠D =180°,所以AB ∥CDD .因为∠A +∠C =180°,所以AB ∥CD 第5题图 二 填空题6.在同一平面内,如果直线b 和c 都与直线a 垂直,那么直线b 和c的位置关系是 . 7.如图,已知∠1=∠2,由此可得 ∥ .第7题图 第8题图8.如图,已知直线、被直线所截,∠1=60°, 则当∠2= °时,∥. 9.如图,小明利用两块相同的三角板,分别在三角板的边缘画直线和,这是根据________________,两直线平行.第9题图 第10题图10.如图,直线a 、b 与直线c 相交,给出下列条件:①∠1=∠2; ②∠4=∠6; ③∠4+∠7=180°; ④∠5+∠3=180°.其中能判断a ∥b 的条件是 (只填序号). 三 解答题11.如图,已知∠1=70°,∠2=110°,请用三种方法判定AB ∥DE.a b c a b AB CD12.已知:如图,CE平分∠ACD,∠1=∠2.求证:AB∥CD.第五章相交线与平行线周周测4 参考答案与解析一、选择题1.A2.B3.B4.D5.C二、填空题6.平行7.AD BC8.1209.内错角相等10.①③④三、解答题11. 解:(1)∵∠1=70°,∴∠AFC=180°-70°=110°.∵∠2=110°,∴∠AFC=∠2,∴AB//DE.(2)∵∠1=70°,∴∠BFD=180°-70°=110°.∵∠2=110°,∴∠BFD=∠2,∴AB//DE.(3)∵∠1=70°,∴∠AFD=70°.∵∠2=110°,∴∠AFD+∠2=180°,∴AB//DE.12.证明:∵CE平分∠ACD,,∴∠2=∠DCE.∵∠1=∠2,∴∠DCE=∠1,∴AB ∥CD.第五章 相交线与平行线周周测5一 选择题1.如果相等的两个角的一边在一条直线上,另一边互相平行,那么这两个角( ) A.相等 B.互补 C.相等或互补 D.不能确定2.如图,∠1和∠2互补,那么图中平行的直线是( ) A.b a // B.d c // C.e d // D.e c //第2题图 第4题图3.下列条件中,能得到互相垂直的是( )A.对顶角的平分线B.邻补角的平分线C.平行线的内错角的平分线D.平行线的同位角的平分线 4.如图,n m //,那么∠1.∠2.∠3的关系是( )A.∠1+∠2+∠3=360°B.∠1+∠2-∠3=180°C.∠1-∠2+∠3=180°D.∠1+∠2+∠3=180°5.一辆汽车在直路上行驶,两次拐弯后,仍按原来的方向行驶,那么这两次拐弯时( ) A.第一次向右拐30°,第二次向右拐30°B.第一次向右拐30°,第二次向右拐150°C.第一次向左拐30°,第二次向右拐150°D.第一次向左拐30°,第二次向右拐30° 6.下列命题中,是假命题的是( )A.同旁内角互补B.对顶角相等C.直角的补角仍然是直角D.两点之间,线段最短7.如图,在三角形ABC中,BC=5,∠A=70°,∠B=75°,把三角形ABC沿直线BC的方向平移到三角形DEF的位置.若CF=3,则下列结论中错误的是 ( ) A.DF=5 B.∠F=35°C.BE=3 D.AB∥DE8.如图,将周长为10个单位的三角形ABC沿边BC向右平移2个单位得到三角形DEF,则四边形ABFD周长为()A.12B.14C.16D.18第8题图第9题图第10题图9.如图是一块长方形ABCD的场地,AB=102m,AD=51m,从A.B两处入口中的路宽都为1m,两小路汇合处路宽为2m,其余部分种植草坪,则草坪的面积为()A.5050m2B.4900m2C.5000m2D.4998m210.如图,O是正六边形ABCDEF的中心,下列图形:三角形OCD;三角形ODE;三角形OEF;三角形OAF;三角形OAB.其中可由三角形OBC平移得到的有()A.1个B.2个C.3个D.4个二填空题11.如图,将三角形ABC沿BC方向平移2cm得到三角形DEF,若三角形ABC周长为16cm,则四边形ABFD周长为.第13题图第14题图第15题图12.如图,长方形ABCD的边AB=10,BC=6,则图中四个小长方形的周长和为.13.如图,在长方形ABCD中,AB=10cm,BC=6cm,若此长方形以2cm/s的速度沿着A→B方向移动,则经过 s,平移后的长方形与原来长方形重叠部分的面积为24 . 14.如图,AB∥EF∥CD,EG平分∠BEF,∠B+∠BED+∠D=192°,∠B-∠D=24°,则∠GEF= .15.“两数之和始终是正数”是________命题(填“真”或“假”).16.把命题“平行于同一条直线的两条直线互相平行”改写成“如果……,那么……”的形式为_______________________________________________.17.如图,是我们生活中经常接触的小刀,刀片的外形是一个直角梯形,刀片上.下是平行的,转动刀片时会形成∠1和∠2,则∠1+∠2=度.第17题图第18题图18.如图,AB∥CD,OE平分∠BOC,OF⊥OE,OP⊥CD,∠ABO=40°,则下列结论:①∠BOE=70°;②OF平分∠BOD;③∠POE=∠BOF;④∠POB=2∠DOF.其中正确结论有(只填序号).三解答题19.如图,点A在直线MN上,且MN//BC.求证:∠BAC+∠B+∠C=180°.M A NB C20.如图,M,N,T和P,Q,R分别在同一直线上,且∠1=∠3,∠P=∠T.求证:∠M=∠R.21.如图,直线m⊥l,n⊥l,∠1=∠2.求证:∠3=∠4.22.已知,如图,DE⊥AC,∠AGF=∠ABC,∠1+∠2=180°,试判断BF与AC的位置关系,并说明理由.第五章相交线与平行线周周测5 参考答案与解析一、选择题1.C2.D3.D4.B5.D6.A7.A8.B9.C 10.B二、填空题11.20 12.32 13.3 14.30°15.假16.如果两条直线平行于同一条直线,那么这两条直线互相平行17. 90 18.①②③三、解答题19.证明:∵MN∥BC,∴∠B=∠MAB,∠C=∠NAC.∵∠BAC+∠MAB+∠NAC=180°,∴∠BAC+∠B+∠C=180°.20.证明:∵∠1=∠3,∠1=∠2,∴∠2=∠3,∴PN∥QT,∴∠T=∠MNP.∵∠P=∠T,∴∠P=∠MNP,∴PR∥MT,∴∠M=∠R..21.证明:∵m⊥l,n⊥l,∴m∥n,∴∠1=∠4,∠,2=∠3.∵∠1=∠2,∴∠3=∠4.22.解:BF⊥AC.理由如下:∵∠AGF=∠ABC,∴FG∥BC,∴∠1=∠3.∵∠1+∠2=180°,∠3+∠2=180°,∴BF∥DE,∴∠BFC=∠DEC.∵DE⊥AC,∴∠DEC=90°,∴∠BFC=90°,∴BF⊥AC.第五章相交线与平行线周周测6一选择题1. 下列命题正确的是( )A.两直线与第三条直线相交,同位角相等B.两直线与第三条直线相交,内错角相等C.两直线平行,内错角相等D.两直线平行,同旁内角相等2.如图,小聪把一块含有60°角的直角三角板的两个顶点放在直尺的对边上,并测得∠1=23°,则∠2的度数是()A.23°B.22°C.37°D.67°3.如图,AB∥CD,点E在CB的延长线上.若∠ABE=70°,则∠ECD的度数为()A.20°B.70°C.100°D.110°4.如图,∠B=∠C,AD∥BC,∠BAC=100°,则∠CAD的度数是()A.30°B.35°C.40°D.50°5.如图,已知AB∥CD,EA是∠CEB的平分线,若∠BED=40°,则∠A的度数是()A.40°B.50°C.70°D.80°6.如图,把一块等腰直角三角板的直角顶点放在直尺的一边上,如果∠1=40°,那么∠2=()A.40°B.45°C.50°D.60°7.如图,已知AC∥BD,∠CAE=30°,∠DBE=45°,则∠AEB等于()A.30°B.45°C.60°D.75°8. 如图,已知a∥b,∠1=130°,∠2=90°,则∠3=()A.70°B.100°C.140°D.170°9.如图,AB∥CD,则根据图中标注的角,下列关系中成立的是()A.∠1=∠3 B.∠2+∠3=180°C.∠2+∠4<180°D.∠3+∠5=180°10.如图,已知AB∥CD,CE平分∠ACD,当∠A=120°时,∠ECD的度数是()A.45°B.40°C.35°D.30°11. 如图,点D是三角形ABC的边AB的延长线上一点,BE∥AC.若∠C=50°,∠DBE=60°,则∠CBD的度数等于()A.120°B.110°C.100°D.70°12.如图,AB∥ED,则∠A+∠C+∠D=( )A.180°B.270°C.360°D.540°二填空题13. 如图,已知AB//DE,∠ABC=75°,∠CDE=150°,则∠BCD的度数为.14.如图,已知AD∥BE,∠DAC=29°,∠EBC=45°,则∠ACB= °.15.如图,已知AB∥CD,∠1=130°,则∠2= .16.如图,AB∥CD,∠1=64°,FG平分∠EFD,则∠EGF= °.三解答题17. 如图,BD平分∠ABC,F在AB上,G在AC上,FC与BD相交于点H. ∠GFH+ ∠BHC=180°.求证:.18.如图,已知∠B=∠C,AD∥BC,求证:AD平分∠CAE.19.如图,已知AB//CD,分别写出下列四个图形中,∠P与∠A,∠C的关系,请你从所得的四个关系中任选一个加以证明.20.如图,点E在直线DF上,点B在直线AC上,若∠1=∠2,∠3=∠4,则∠A=∠F,请说明理由.解:∵∠1=∠2(已知),∠2=∠DGF(),∴∠1=∠DGF,∴BD∥CE(),∴∠3+∠C=180º().又∵∠3=∠4(已知),∴∠4+∠C=180º,∴∥DF(同旁内角互补,两直线平行),∴∠A=∠F().第五章相交线与平行线周周测6 参考答案与解析一、选择题1.C2.C3.D4.C5.C6.C7.D8.C9.D 10.D 11.B 12.C二、填空题13.45°14.74 15.50°16.32三、解答题17.证明:∵BD平分∠ABC,∴∠2=∠ABD.∵∠GFH+∠BHC=180°,∠FHD=∠BHC,∴∠GFH+∠FHD=180°,∴FG∥BD,∴∠1=∠ABD.∵∠2=∠ABD,∴∠1=∠2.18.证明:∵AD∥BC,∴∠2=∠B,∠1=∠C.∵∠B=∠C,∴∠1=∠2,∴AD平分∠CAE.19.解:(1)∠P=360°-∠A-∠C.(2)∠P=∠A+∠C.(3)∠P=∠C-∠A.(4)∠P=∠A-∠C.若选(3),证明如下:过点P向左作PQ∥AB,则∠A=∠APQ.∵AB∥CD,∴PQ∥CD,∴∠C=∠CPQ,∴∠CPA=∠CPQ-∠APQ=∠C-∠A.20.对顶角相等同位角相等,两直线平行两直线平行,同旁内角互补AC 两直线平行,内错角相等第五章相交线与平行线周周测7一选择题1.将图①所示的图案通过平移后可以得到的图案是()A B C D 图①2.在5×5方格纸中将图①中的图形N平移后的位置如图②所示,那么下面平移中正确的是()A. 先向下移动1格,再向左移动1格B. 先向下移动1格,再向左移动2格C. 先向下移动2格,再向左移动1格D. 先向下移动2格,再向左移动2格第2题图第3题图3.如图,已知三角形ABC的面积为8,将三角形ABC沿BC的方向平移到三角形A’B’C’的位置,使B’和C重合,连结AC’交A’C于D,则三角形CAC’的面积为()A.4B.6C.8D.164.四根火柴棒形成如图所示的“口”字,平移火柴棒后,原图形能变成的汉字是()5.如图,面积为12cm²的三角形ABC沿BC方向平移至三角形DEF的位置,平移的距离是边BC的2倍,则图中四边形ACFD的面积为()A.24cm²B.36cm²C.48cm²D.60cm²第5题图第6题图6.如图,小明从家到学校有①②③三条路可走,每条路的长分别为a,b,c,则()A. B. C. D.7.从棱长为2的正方体毛坯的一角,挖去一个棱长为1的小正方体,得到一个如图所示的零件,则这个零件的表面积是()A.20 B.22 C.24 D.26第7题图第8题图8.如图,将网格中的三条线段沿网格线平移后组成一个首尾相接的三角形,至少需要移动()A.8格B.9格C.11格D.12格二填空题9.如图,将三角形ABC沿BC方向平移2cm得到三角形DEF,若三角形ABC周长为16cm,则四边形ABFD周长为.第9题图第10题图第11题图10.如图,将三角形ABC沿射线AC平移得到三角形DEF.若AF=17,DC=7,则AD= .11.如图,边长为8cm的正方形ABCD先向上平移4cm,再向右平移2cm,得到正方形A′B′C′D′,此时阴影部分的面积为_________.12.某小区的一块长26米,宽15米的草坪内要修一条如图所示宽度相同的通道.当通道的宽度为2米时,剩下的草坪面积是通道面积的倍.第12题图第13题图第14题图13.鑫都大酒店在装修时,准备在主楼梯(如图)上铺上红地毯,已知这种地毯每平方米售价35元.楼梯宽2米,则购买这种地毯至少需元.14.如图,把直角梯形ABCD沿AD方向平移到梯形EFGH,HG=24cm,WG=8cm,WC=6cm,求阴影部分的面积为cm2.三解答题15.如图,已知,AB∥CD,直线EF分别交AB,CD于点E,F,EG平分∠AEF,∠1=40°,求∠2的度数.16.如图①是长方形纸带,将纸带沿EF折叠成图②,再沿BF折叠成图③.(1)若图①中∠DEF=20°,则图③中∠CFE的度数是多少?(2)若图①中∠DEF=α,把图③中∠CFE的度数用α表示是多少?17.如图,DB∥FG∥EC,∠ABD=60°,∠ACE=36°,AP平分∠BAC.求∠PAG的度数.第五章相交线与平行线周周测7 参考答案与解析一、选择题1.A2.C3.C4.B5.C6.C7.C8.A二、填空题9.20 10.5 11.24cm²12.4 13.630 14.168三、解答题15.解:∵AB∥CD,∠1=40°,∴∠AEG=∠1=40°.∵EG平分∠AEF,,∴∠AEF=2∠AEG=80°,∴∠2=180°-∠AEF=180°-80°=100°.16.解:图①中,∵AD∥BC,∴∠DEF=∠BFE,∴∠CFE=180°-∠DEF.图②中,由折叠得∠CEF=180°-∠DEF,∴∠CFB=∠CEF-∠BFE=180°-2∠DEF.图③中,由折叠得∠CFB=180°-2∠DEF,∴∠CFE=∠CFB-∠BFE=180°-3∠DEF.(1)若图①中∠DEF=20°,则图③中∠CFE=180°-3×20°=120°.(2)若图①中∠DEF=α,则图③中∠CFE=180°-3α.17.解:∵DB∥FG∥EC,∠ABD=60°,∠ACE=36°,∴∠BAG=∠ABD=60°,∠CAG=∠ACE=36°,∴∠BAC=∠BAG+∠CAG=60°+36°=96°.∵AP平分∠BAC,∴∠PAC=12∠BAC=12×96°=48°,∴∠PAG=∠PAC-∠CAG=48°-36°=12°.第五章相交线与平行线周周测8一选择题1.下列选项中能由左图平移得到的是()A. B. C. D.2.在四边形ABCD中,下列各图中∠1与∠2相等的是()3.如图,在铁路旁有一李庄,现要建一火车站,为了使李庄人乘车最方便,请你在铁路线上选一点来建火车站,应建在()A.A点B.B点C.C点D.D点4.将命题“对顶角相等”写成“如果……,那么……”的形式,正确的是()A.如果两个角相等,那么它们是对顶角B.如果两个角是对顶角,那么它们相等C.如果对顶角,那么相等D.如果两个角不是对顶角,那么这两个角不相等5.如图,与∠1是同旁内角的是()A.∠2B.∠3C.∠4D.∠56.如图,AB//CD,∠AGE=128°,HM平分∠EHD,则∠MHD的度数是()A.46°B.23°C.26°D.24°7.如图,下列条件中,不能判断直线l1∥l2的是()A.∠1=∠3B.∠4=∠5C.∠2=∠3D.∠2+∠4=180°8.如图,直线l1∥l2,若∠1=140°,∠2=70°,则∠3的度数是()CA.60°B.65°C.70°D.80°9.如图,已知AD∥BC,∠B=30°,DB平分∠ADE,则∠DEC=()A.30°B.60°C.90°D.120°10.如图,已知AB∥DE,∠ABC=70º,∠CDE=140º,则∠BCD的值为( )A.70ºB.50ºC.40ºD.30º二填空题11.如图,将三角形ABC沿BC’方向平移4cm,得到三角形A’B’C’,那么CC’= cm.12.将一个直角三角板和一把长方形直尺按如图放置,若∠α=54°,则∠β的度数是______.13.如图,把矩形ABCD沿EF对折后使两部分重合,若∠1=40°,则∠AEF=.14.如图,直线a∥b,三角板的直角顶点A落在直线a上,两条直角边分别交直线b于B,C两点.若∠1=42°,则∠2的度数是.15.如图,AB∥CD,∠B=160°,∠D=120°,则∠E=_________16.如图①:MA1∥NA2,图②:MA1∥NA3,图③:MA1∥NA4,图④:MA1∥NA5,…,则第n个图中的∠A1+∠A2+∠A3+…+∠A n+1= °(用含n的代数式表示).三解答题17.完成下面的证明:已知,如图,AB∥CD∥GH,EG平分∠BEF,FG平分∠EFD.求证:∠EGF=90°.证明:∵HG∥AB(已知),∴∠1=∠3(______ ).又∵HG∥CD(已知),∴∠2=∠4.∵AB∥CD(已知),∴∠BEF+______=180°(______ ).又∵EG平分∠BEF(已知),∴∠1=∠______.又∵FG平分∠EFD(已知),∴∠2=∠______,∴∠1+∠2=(______ ),∴∠1+∠2=90°,∴∠3+∠4=90°(______ ),即∠EGF=90°.18.如图是一个汉字“互”字,其中,∥,∠1=∠2,∠=∠.求证:∠=∠.19.如图,CD⊥AB于D,点F是BC上任意一点,FE⊥AB于E,且∠1=∠2,∠3=80°. (1)证明:∠B=∠ADG;(2)求∠BCA的度数.20.如图,EF∥AD,AD∥BC,CE平分∠BCF,∠DAC=120°,∠ACF=20°,求∠FEC的度数.21.如图,已知DC∥FP,∠1=∠2,∠FED=28º,∠AGF=80º,FH平分∠EFG.(1)证明:DC∥AB;(2)求∠PFH的度数.22.如图,已知AB∥CD,C在D的右侧,BM平分∠ABC,DN平分∠ADC,BM,DN所在直线交于点E,∠ADC =70°.(1)求∠EDC的度数;(2)若∠ABC =n°,求∠BED的度数(用含n的代数式表示);(3)将线段BC沿DC方向平移,使得点B在点A的右侧,其他条件不变,画出图形并判断∠BED的度数是否改变,若改变,求出它的度数(用含n的式子表示);若不改变,请说明理由.第五章相交线与平行线周周测8参考答案与解析一、选择题1.C2.B3.A4.B5.A6.C7.C8.C9.B 10.D二、填空题11.4 12.36° 13.110° 14.48° 15.40° 16.180n三、解答题17.两直线平行,内错角相等∠EFD 两直线平行,同旁内角互补 BEF EFD ∠BEF+∠EFD 等量代换18.证明:如图,延长交于点.∵∥,∴∠1=∠3.又∵∠1=∠2,∴∠2=∠3,∴∥HN,∴∠=∠.又∵∠=∠,∴∠=∠.19.(1)证明:∵CD⊥AB,FE⊥AB,∴CD∥EF,∴∠2=∠BCD.∵∠1=∠2,∴∠1=∠BCD,∴BC∥DG,∴∠B=∠ADG.(2)解:∵DG∥BC,∴∠3=∠BCA.∵∠3=80°,∴∠BCA=80°.20.解:∵EF∥AD,AD∥BC,∴EF∥BC,∴∠ACB+∠DAC=180°.∵∠DAC=120°,∴∠ACB=60°.又∵∠ACF=20°,∴∠FCB=∠ACB﹣∠ACF=40°.∵CE平分∠BCF,∴∠BCE=20°.∵EF∥BC,∴∠FEC=∠BCE=20°.21.(1) 证明:∵∠1=∠2,∴AB∥FP.∵DC∥FP,∴DC∥AB.(2)解:∵DC∥FP,∴∠EFP=∠FED=28º.∵AB∥FP,∴∠GFP=∠AGF=80º.∴∠EFG=∠EFP+∠GFP=28°+80°=108°.∵FH平分∠EFG,∴∠EFH=∠EFG=×108°=54°,∴∠PFH=∠EFH-∠EFP=54°-28°=26 º.22.解:(1)∵DE平分∠ADC,∠ADC=70°,∴∠EDC=∠ADC=×70°=35°.(2)如图,过点E向左作EF∥AB.∵AB∥CD,∴AB∥CD∥EF,∴∠ABE=∠BEF,∠CDE=∠DEF.∵BE平分∠ABC,DE平分∠ADC,∠ABC=n°,∠ADC=70°,∴∠ABE=∠ABC=n°,∠CDE=∠ADC=35°,∴∠BED=∠BEF+∠DEF=n°+35°.(3)如图①,过点E向左作EF∥AB.∵BE平分∠ABC,DE平分∠ADC,∠ABC=n°,∠ADC=70°,∴∠ABE=∠ABC=n°,∠CDE=∠ADC=35°.∵AB∥CD,∴AB∥CD∥EF,∴∠BEF=180°-∠ABE=180°-n°,∠CDE=∠DEF=35°,∴∠BED=∠BEF+∠DEF=180°-n°+35°=215°-n°.图①图②如图②,过点E向左作EF∥AB.∵BM平分∠ABC,DE平分∠ADC,∠ABC=n°,∠ADC=70°,∴∠ABM=∠ABC=n°,∠CDE=∠ADC=35°.∵AB∥CD,∴AB∥CD∥EF,∴∠BEF=∠ABM=n°,∠CDE=∠DEF=35°,∴∠BED=∠BEF-∠DEF=n°-35°.综上所述,∠BED的度数发生了改为,改变为215°-n°或n°-35°.第五章相交线与平行线周周测9一选择题1.点P为直线l外一点,点A,B,C为直线l上三点,P A=4cm,PB=5cm,PC=3cm,则点P到直线l的距离为()A.4cm B.5cmC.小于3cm D.不大于3cm2.如图,点E,F分别是AB,CD上的点,点G是BC的延长线上一点,且∠B=∠DCG=∠D,则下列判断中,错误的是()A.∠AEF=∠EFC B.∠A=∠BCFC.∠AEF=∠EBC D.∠BEF+∠EFC=180°第2题图第3题图3.如图,∠AOB的一边OA为平面镜,∠AOB=37°36′,在OB上有一点E,从E点射出一束光线经OA上一点D反射,反射光线DC恰好与OB平行,且∠ODE与∠ADC相等,则∠DEB的度数是()A.75°36′ B.75°12′ C.74°36′ D.74°12′4.下列图形中,可以由其中一个图形通过平移得到的是()5.如图①~④,其中∠1与∠2是同位角的有()A.①②③④B.①②③C.①③D.①第5题图第6题图6.如图,能判断直线AB∥CD的条件是()A.∠1=∠2 B.∠3=∠4C.∠1+∠3=180° D.∠3+∠4=180°7.有下列命题:①对顶角相等;②在同一平面内,垂直于同一条直线的两直线平行;③相等的角是对顶角;④内错角相等.其中假命题有()A.①②B.①③C.②④D.③④8.若∠1与∠2是对顶角且互补,则它们两边所在的直线()A.互相垂直B.互相平行C.既不垂直也不平行D.不能确定9.如图,BD∥AC,BE平分∠ABD,交AC于点E.若∠A=50°,则∠1的度数为() A.65° B.60° C.55° D.50°第9题图第10题图10.已知直线m∥n,将一块直角三角板ABC按如图方式放置(∠ABC=30°),其中A,B两点分别落在直线m,n上.若∠1=20°,则∠2的度数为()A.20° B.30°C.45° D.50°二填空题11.如图,当剪刀口∠AOB增大21°时,∠COD增大________°.第11题图第12题图12.如图,平行线AB,CD被直线AE所截,∠1=50°,则∠A=________°.13.如图,在线段AC,BC,CD中,线段________最短,理由是____________________.第13题图第14题图14.如图,直线AB,CD相交于点O,OE⊥AB,∠COE=68°,则∠BOD的度数为________.15.如图,直线l1∥l2,∠1=20°,则∠2+∠3=________°.第15题图第17题图16.平移变换不仅与几何图形有着密切的联系,而且在一些特殊结构的汉字中,也有平移变换的现象,如:“日”“朋”“森”等,请你再写两个具有平移变换现象的汉字_____ ___.17.如图是超市里购物车的侧面示意图,扶手AB与车底CD平行,∠2比∠3大10°,∠1是∠2的1911倍,则∠2的度数是________.18.以下三种沿AB折叠纸带的方法:(1)如图①,展开后测得∠1=∠2;(2)如图②,展开后测得∠1=∠2且∠3=∠4;(3)如图③,测得∠1=∠2.其中能判定纸带两条边线a,b互相平行的是________(填序号).三解答题19.如图,直线AB,CD相交于O,OE是∠AOD的平分线,∠AOC=28°,求∠AOE的度数.20.如图,在方格纸中,每个小方格的边长均为1个长度单位,三角形ABC的三个顶点和点P都在小方格的顶点上.要求:①将三角形ABC平移,使点P落在平移后的三角形内部;②平移后的三角形的顶点在方格的顶点上.请你在图甲和图乙中分别画出符合要求的一个示意图,并写出平移的方法.21.如图,已知AE⊥BC,FG⊥BC,∠1=∠2.求证:AB∥CD.22.如图,直线AB,CD相交于点O,OE把∠BOD分成两部分.(1)直接写出图中∠AOC的对顶角为________,∠BOE的邻补角为________;(2)若∠AOC=70°,且∠BOE∶∠EOD=2∶3,求∠AOE的度数.23.如图,现有以下3个论断:①AB∥CD;②∠B=∠C;③∠E=∠F.请以其中2个论断为条件,另一个论断为结论构造命题.(1)你构造的是哪几个命题?(2)你构造的命题是真命题还是假命题?请选择其中一个真命题加以证明.24.如图,已知AB∥CD,CE,BE的交点为E,现作如下操作:第一次操作,分别作∠ABE和∠DCE的平分线,交点为E1,第二次操作,分别作∠ABE1和∠DCE1的平分线,交点为E2,第三次操作,分别作∠ABE2和∠DCE2的平分线,交点为E3……第n次操作,分别作∠ABE n-1和∠DCE n-1的平分线,交点为E n.(1)如图①,求证:∠BEC=∠B+∠C;(2)如图②,求证:∠BE2C=14∠BEC;(3)猜想:若∠E n=b°,求∠BEC的度数.第五章相交线与平行线周周测9 参考答案与解析一、选择题1.D2.C3.B4.B5.C6.D7.D8.A9.A 10.D二、填空题11.21 12.50 13.CD 垂线段最短14.22°15.20016.林晶(答案不唯一)17.55°18.①②三、解答题19.解:∵∠AOC=28°,∴∠AOD=180°-∠AOC=180°-28°=152°.∵OE是∠AOD的平分线,∴∠AOE=12∠AOD=12×152°=76°.20.解:如图,共有3种情况:图甲图乙图丙图甲:将三角形ABC向右平移4个单位长度;图乙:将三角形ABC先向右平移4个单位长度,再向上平移1个单位长度;图丙:将三角形ABC先向右平移3个单位长度,再向上平移1个单位长度.21.证明:∵AE⊥BC,FG⊥BC,∴AE∥FG,∴∠1=∠A.∵∠1=∠2,∴∠2=∠A,∴AB∥CD.22.解:(1)∠BOD ∠AOE(2)∵∠AOC=70°,∴∠BOD=70°.∵∠BOE∶∠EOD=2∶3,∴∠BOE=25∠BOD=25×70°=28°,∴∠AOE=180°-∠BOE=180°-28°=152°.23.解:(1)命题一:如果AB∥CD,∠B=∠C,那么∠E=∠F.命题二:如果AB∥CD,∠E=∠F,那么∠B=∠C.命题三:如果∠B=∠C,∠E=∠F,那么AB∥CD.(2)三个命题都是真命题.若选择命题(1),证明如下:∵AB∥CD,∴∠B=∠CDF.∵∠B=∠C,∴∠CDF=∠C,∴AC∥BD,∴∠E=∠F.24.(1)证明:过点E向左作EF∥AB.∵AB∥CD,∴AB∥CD∥EF,∴∠BEC=∠B,∠CEF=∠C,∴∠BEC=∠BEF+∠CEF=∠B+∠C.(2)证明:同(1)理,可证∠BE1C=∠ABE1+∠DCE1,∠BE2C=∠ABE2+∠DCE2.∵∠ABE和∠DCE的平分线交于点E1,∠ABE1和∠DCE1交于点E2,∴∠ABE1=12∠ABE,∠DCE1=12∠DCE,∠ABE2=12∠ABE1,∠DCE2=12∠DCE1,∴∠BE1C=12∠ABE+12∠DCE=12∠BEC,∴∠BE2C=12×12∠ABE+12×12∠DCE=14∠BEC.(3)由(1)(2)知∠BE1C=12∠BEC,∠BE2C=14∠BEC,∴∠∠BE n C=12n⎛⎫⎪⎝⎭∠BEC,∴若∠E n=b°,∠BEC=2n。

2021-2022年高三上学期英语周测卷(一) 含答案

2021-2022年高三上学期英语周测卷(一) 含答案

2021年高三上学期英语周测卷(一)含答案II. Grammar and Vocabulary(26%)SectionADirections: Read the following two passages. Fill in the blanks to make the passage coherent. For the blanks with a given word, fill in each blank with the proper form of the given word. For the other blanks, fill in each blank with one proper word. Make sure that your answers are grammatically correct.ANo trip to South Korea is plete without a visit to its fascinating theme parks. For those who assume that amusement parks are just playgrounds teeming with kids, South Korea’s theme parks are sure (25)______(change) their minds.With their charming garden plantations, hot springs and exciting rides, they offer travellers a romantic and exciting getaway. Within the appropriate driving distance from the Korean capital Seoul, there are three theme parks worth (26)______ (visit)—Lotte World, Everland and Seoul Land.Everland, the (27)______(large) theme park in South Korea, covering various areas like Festival World, Caribbean Bay and Speedway. It is such (28)______ huge park that you will have to plan in advance where you are investing your time there.Lotte World, (29)_____ designer was determined to create a wonderland for fun-seekers, consists of Lotte World Adventure, and movie theatres. You (30)______ also take part in activities such as ice-skating or bowling there.(31)______ travellers want, South Korea is there to provide. Hop on aheart-stopping ride, amuse yourself in one of the theme parks or simply enjoy a (32)_____(relax) hot spring bath. e and visit South Korea now!(B)Some of young soldiers who had recently joined the army were being trained in modern ways of fighting. One of the lessons they should take was (33) ______ an unarmed man could trick an armed enemy, take his weapon away and have him (34) ______ (arrest). First one of their two instructors took a knife away from the other, using only his bare hands, and then he took a gun away from him in the same way.After the lesson, and before they went on to train the young soldiers to do these things themselves, the two instructors asked them a number of questions to see how well they had understood what (35) ______ (show). One of the questions was this, “Well, you now know (36) ______ an unarmed man can do against a man with a gun. Imagine that you (37) ______ (guard) a bridge at eight one night, and that you have a gun. Suddenly you see an unarmed enemy soldier (38) ______ (e) towards you, and what will you do?”The young soldier (39) ______ had to answer this question thought carefully for a few seconds (40) ______ he answered, and then said, “Well after what I have just seen, I think that the first thing I would do would be to get rid of my gunas quickly as I could so that the unarmed enemy soldier couldn’t take it from me and kill me with it!”Section BDirections: plete the following passage by using the words in the box. Each word can be used only once. Note that there is one word more than you need.If this summer you pay a visit to Milan, the fashion center of Italy, make sure you’re not caught eating ice cream in the streets after midnight as doing so is now ___41___.A new law was passed by Milan’s city council banning the sale of take-away food and drinks after midnight in some districts which are famous for their nightlife ___42___. The purpose of this unusual move is, according to the city council, to discourage night gathering in downtown areas.The law inevitably has given rise to a number of protests, accusing that the government has ___43___ people’s normal lives. However, if you take into consideration the country’s ___44___ economy and its high unemployment rate, the local government’s fear of ‘night assembling’may be reasonable.In fact, Milan’s law is only the strangest of a host of restrictions on nightlife that have ___45___ up in European cities recently. Madrid’s citycenter was declared a ‘low-noise zone’ last September and the city council has been refusing to ___46___ bar and club licenses ever since.Why do European cities deal so strictly with nightlife? It may be because Europe’s population is getting older and can no longer ___47___ late night activities within the neighborhood.In the past, bars and clubs bloomed in European city centers, which were ___48___ to working class populations. But gradually, these people began to move out of the city centers and into the suburbs. Only the wealthy and the upper-class people can afford to live in ___49___ centers now. But these people don’t go to bars and clubs to socialize. Instead, they consider fun-seekers who wander in their neighborhoods annoying. They also worry that bars and clubs will make their neighborhoods less ___50___ and devalue their housing property.III. Reading prehension(47%)Section ADirections:For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.Many of us have characteristics that are inherited from our families. Maybewe have our father’s eyes or our grandmother’s hair color – __51__ features that result from the genes we inherit. But there are other elements of our personalities such as behaviors and viewpoints that we pick up by __52__ our parents. Perhaps we have picked up our mother’s love of cleaning or our dad’s sense of humor. Now, researchers at the University of Michigan believe there may be a specific viewpoint we can thank our parents for: the way we __53__ work.The researchers referred to previous studies that identified three main ways of viewing work.First, there are job-oriented (以求职为目的的)people, those who __54__ to see their job as simply a way to make money. They __55__ to clocking out(打卡下班)every day and pursuing fun activities __56__ the office. If you have a job-oriented father, you may view work this way. __57__, if you grew up close to your mother you probably will not hold this viewpoint. One possible __58__ cited by the study: Youngsters that grow up close to their mothers are less likely to view work as just a job.Second, there are career-oriented(追求事业型的)people who see their job as a place to find __59__ and gain a sense of __60__. These are the people who don’t __61__ working overtime. In fact, some people love their jobs so much that they bee workaholics! They are more fortable in the office than at home. According tothe study, being close to a career- oriented father while growing up means there’s a good chance you’ll share his perspective. Oddly, having a mother with this viewpoint seems to have little __62__.Third, there are calling-oriented workers – folks who view their job as a way to make a (n) __63__ impact upon the world. They are more __64__ with improving the world around them than earning a large salary. In the study, those who expressed a strong calling (天职)orientation came from homes where both parents were calling-oriented. This suggests that adolescents need the support of both parents in order to have the confidence to put __65__ first and career success second.The good news is –we still have choice. Whether we share our parents’views of work or not, we can still find a career that suits us.51. A. medical B. physical C. biological D. mental52. A. stimulating B. neglecting C. implying D. modeling53. A. view B. think C. evaluate D. ment54. A. attempt B. manage C. tend D. offer55. A. pay attention B. are opposed C. look forward D. are devoted56. A. outside B. inside C. upside D.downside57. A. Otherwise B. Therefore C. However D. Moreover58. A. observation B. explanation C. negotiation D. instruction59. A. salary B. pany C. direction D. achievement60. A. trust B. identity C. despair D. urgency61. A. like B. resist C. mind D. consider62. A. influence B. evidence C. performance D. justice63. A. objective B. negative C. subjective D. positive64. A. familiar B. concerned C. anxious D. bined65. A. personal ideals B. economic profitsC. professional achievementsD. global developmentSection BDirections:Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are four choices markedA, B, C and D. Choose the one that fits best according to the information given in the passage you have just read.(A)On “Super Bowl Sunday”, millions of Americans are glued to their TVs. They are eating pizza, chicken wings and chips and cheering every move. They’re watching the Super Bowl.Why are Americans so crazy about American football? Well, it is more exciting than other sports. One team can lose possession of the ball in a minute, which may allow their opponents to make a touchdown(触地得分). Then that team may win the game unexpectedly.The Super Bowl also entertains its audience with a great halftime show. The football field is turned into a stage. Then an impressive performance of dancing and singing with special effects occurs.Since the Super Bowl is the most-watched TV program in America, mercial airtime is also very expensive. Big money is also spent on mercials. They draw the viewers’attention and advertise their image or products during the mercial break.After football season, the “March Madness”begins. The NCAA (National Collegiate Athletic Association) petitions begin with 68 men’s collegebasketball teams. They play until the field is reduced to the “Final Four”. The winning team bees the national champion. The NBA (National Basketball Association) All-Star game is also held in February. The best players from all the teams play in this game.Baseball is no doubt American’s national sport. From grandpas to young kids, whole families go to ball games together. They wear their favorite team’s caps or even carry their mascot(吉祥物). Our family went to watch Wang Chien-Ming play in D.C. once. We ate hot dogs, waved flags and sang during the 7th inning(棒球的一局) stretch.If you are not a sports fan yet, e and pick a sport or a team. Go to a ball game with your family, and cheer your team on. Sports are definitely a part of American culture one should not miss.66. According to the passage, the Super Bowl is _____.A. a well-received American football gameB. an expensive American sportC. an impressive TV performanceD. a most-watched TV series67. Which of the following may be one of the reasons for the popularity of the Super Bowl?A. Its results are too exciting to meet viewers’ expectations.B. People can eat pizza, chicken wings and chips when watching it.C. Its mercials are expensive enough to draw viewer s’ attention.D. The performances during its halftime show are appealing to viewers.68. Which of the following is TRUE according to the passage?A. Americans spend a large amount of money on ball games.B. American people of all ages like going to watch baseball games.C. All the American stars take part in the national basketball game.D. There are important national ball games in America almost every month.69. The passage is mainly written to _____.A. inform readers of the three popular sports in AmericaB. teach readers how to understand the sports culture in AmericaC. encourage readers to fit in with American culture through sportsD. show readers the importance of sports in young people’s life in America(B)Getting to work by bicycle has never been more ernments and nations are transforming their cities and highways to meet the needs of this new generation of cycling enthusiasts , and in a world where green alternatives (选择) are the new must-have, average citizens are eagerly seizing their chance to help make their streets and their bodies cleaner than ever before.Bee an EBTC Member-Click Here.The Edmonton Bicycle and Touring Club ( EBTC) is a recreationalnot-for-profit volunteer-run group devoted to promoting its members to cooperatively run bicycling trips during the spring, summer and fall, cross-country skiing trips in the winter, and social events all the year round. We wele both road bike and mountain bike riders !Benefits of Joining EBTC :·Opportunity to create the kinds of events you like: enjoy dozens of events all year round, organized by members like you !·Participation in the local cycling munity.·Use of club bicycle tools on tour and library materials.·Discounts at various bicycle shops.Why Cycle with a Group?·It's more FUN !·It encourages you to e out often and get healthy exercise without going to a gym.·Develop skills and gain through the experience of others.·Meet new and interesting people with a mon interest in cycling.·Meet a fun-loving, energetic and different group of individuals who enjoy a healthy lifestyle.·Enjoy the outdoors experience with the panionship and security of a group.·Group atmosphere provides challenge to strong cyclists and support and confidence to the novice .For more info on the EBTC:Phone the Club Hotline at 780-424-2453 (780-424-BIKE)E-mail: jprimeau@ edmontonbicycle.Mail us at : Edmonton Bicycle & Touring ClubP. O. Box 5xxGarneau Postal Stn.Edmonton, AB T6G 2T5 Canada70. The aim of EBTC is ______ .A. to call for governments to produce more bicyclesB. to make money by organizing bicycling tripsC. to popularize cycling by attracting more membersD. to look for young volunteers for sporting events71.What's the advantage of cycling with a group? ______A. Participating in whatever events.B. Meeting more new people.C. Having bicycles free of charge.D. Enjoying discounts in a gym.72.The underlined word "novice" in the passage probably means "________ .A. professional cyclistB. inexperienced riderC. event organizerD. healthy individual73.Apart from the website, how many other ways can people gain information from EBTC?A. Two.B. Three.C. Four.D. Five.(C)The Tourist Trade Contributes Absolutely Nothing to Increasing Understanding between Nations) The tourist trade is booming. With all this ing and going, you’d expect greater understanding to develop between the nations of the world. Not a bit of it! Superb systems of munication by air, sea and land make it possible for us to visit each other ’s countries at a moderate cost. What was once the ‘grand tour ’, reserved for only the very rich, is now within everybody ’s grasp? The package tour and chartered flights are not to be sneered at. Modern travelers enjoy a level of fort which the lords and ladies on grand tours in the old days couldn’t have dreamed of. But what ’s the sense of this mass exchange of populations if the nations of the world remain basically ignorant of each other? Many tourist organizations are directly responsible for this state of affairs. They deliberately set out to protect their clients from too much contact with the local population. The modern tourist leads a cosseted, sheltered life. He lives at international hotels, where he eats his international food and sips his international drink while he gazes at the natives from a distance. Conducted tours to places of interest are carefully censored. The tourist is allowed to see only what the organizers want him to see and no more. A strict schedule makes itimpossible for the tourist to wander off on his own; and anyway, language is always a barrier, so he is only too happy to be protected in this way. At its very worst, this leads to a new and hideous kind of colonization. The summer quarters of the inhabitants of the cite universitaire: are temporarily reestablished on the island of Corfu. Blackpool is recreated at Torremolinos where the traveler goes not to eat paella, but fish and chips.The sad thing about this situation is that it leads to the persistence of national stereotypes. We don’t see the people of other nations as they really are, but as we have been brought up to believe they are. You can test this for yourself. Take five nationalities, say, French, German, English, American and Italian. Now in your mind, match them with these five adjectives: musical, amorous, cold, pedantic, native. Far from providing us with any insight into the national characteristics of the peoples just mentioned, these adjectives actually act as barriers. So when you set out on your travels, the only characteristics you notice are those which confirm your preconceptions. You e away with the highly unoriginal and inaccurate impression that, say, ‘Anglo-Saxons are hypocrites’ of that ‘Latin peoples shout a lot ’. You only have to make a few foreign friends to understand how absurd and harmful national stereotypes are. But how can you make foreign friends when the tourist trade does its best to prevent you?Carried to an extreme, stereotypes can be positively dangerous. Wild generalizations stir up racial hatred and blind us to the basic fact—how triteit sounds! – That all people are human. We are all similar to each other and atthe same time all unique.74.The passage mainly wants to tell us________A.tourism contributes nothing to increasing understanding between nations.B.Tourism is tiresome.C.Conducted tour is dull.D. tourism really does something to one’s country.75.What is the author's attitude toward tourism?A.apprehensive.B.negative.C.critical.D. appreciative.76.The word”cosseted” (para 2 line 3) probably means_____A.over-protectedB.variedC.limitedD.luxurious77.What is ‘grand tour’ now?A. moderate cost.B. local sight-seeing is investigated by the tourist organization.C.people enjoy the first-rate forts.D.everybody can enjoy the ‘grand tour’.Section CDirections: Read the passage carefully. Then answer the questions or plete the statements in the fewest possible words.Yes, but what did we use to do before there was television? How often we hear statements like this! Television hasn’t been with us all that long, but we are already beginning to forget what the world was like without it. Before we admitted the one-eyed monster into our homes, we never fond it difficult to occupy our spare time. We used to enjoy civilized pleasures. For instance, we used to have hobbies, we used to entertain our friends and be entertained by them, we used to go outside for our amusements to theatres, cinemas, restaurants and sporting events. We even used to read books and listen to music and broadcast talks occasionally. All that belongs to the past. Now all our free time is regulated by the goggle box. We rush home or gulp down our meals to be in time for this or that programme. We have even given up sitting at table and having a leisurely evening meal, exchanging the news of the day. A sandwich and a glass of beer will do – anything, providing it doesn’t interfere with the programme. The monster demands and obtains absolute silence and attention. If any member of the family dares to open his mouth during aprogramme, he is quickly silenced.Whole generations are growing up addicted to the telly. Food is left uneaten, homework undone and sleep is lost. The telly is a universal pacifier. It is now standard practice for mother to keep the children quiet by putting them in the living-room and turning on the set. It doesn’t matter that the children will watch rubbishy mercials or spectacles of sadism and violence – so long as they are quiet.There is a limit to the amount of creative talent available in the world. Every day, television consumes vast quantities of creative work. That is why most of the programmes are so bad: it is impossible to keep pace with the demand and maintain high standards as well. When millions watch the same programmes, the whole world bees a village, and society is reduced to the conditions which obtain in preliterate munities. We bee utterly dependent on the two most primitive media of munication: pictures and the spoken word.Television encourages passive enjoyment. We bee content with second-hand experiences. It is so easy to sit in our armchairs watching others working. Little by little, television cuts us off from the real world. We get so lazy, we choose to spend a fine day in semi-darkness, glued to our sets, rather than go out into the world itself. Television may be s splendid medium of munication, but itprevents us from municating with each other. We only bee aware how totally irrelevant television is to real living when we spend a holiday by the sea or in the mountains, far away from civilization. In quiet, natural surroundings, we quickly discover how little we miss the hypnotic tyranny of King Telly.78.What does a mother usually do to keep her children quiet?_______________________________________________________________________ ___79.what’s the author’s suggestion to forget TV?_________________________________________80.&81Please smmerize at least two harms of TV80.__________________________________________________________________________ __81.__________________________________________________________________________ __第II卷I. Translation (22%)Directions:Translate the following sentences into English, using the words given in the brackets.1.这位明星因为吸毒被警方逮捕。

人教版七年级数学下单元周周测(一)(5

人教版七年级数学下单元周周测(一)(5
七年级 数学 下册 人教版
周周测(一)(5.1-5.2) (时间:45分钟 满分:100分)
七年级 数学 下册 人教版
一、选择题(每小题 5 分,共 20 分)
1.邻补角是
(D )
A.和为 180°的两个角
B.有公共顶点且互补的两个角
C.有一条公共边且相等的两个角
D.有公共顶点且有一条公共边,另一边互为反向延长线的两个角
七年级 数学 下册 人教版
14.(12 分)如图,O 为直线 AB 上一点,OC 为一射线,OE 平分∠AOC,OF 平分∠BOC. (1)若∠BOC=50°,试探究 OE,OF 的位置关系; (2)若∠BOC=α(0°<α<180°),(1)中 OE,OF 的 位置关系是否仍成立?请说明理由,由此你发现了 什么规律?
七年级 数学 下册 人教版
12.(10 分)将一副三角板拼成如图所示的图形,过点 C 作 CF 平分∠DCE 交 DE 于点 F. (1)试说明 CF∥AB; (2)求∠DFC 的度数.
七年级 数学 下册 人教版
解:(1)由题意可知∠3=45°,∠DCE=90°, ∵CF 平分∠DCE, ∴∠1=∠2=45°,∴∠3=∠1,∴AB∥CF. (2)由题意知:∠D=30°,又∠1=45°, ∴∠DFC=180°-30°-45°=105°.
(2)OE⊥OF 仍成立.理由:由邻补角的定义,可得∠AOC=180°-α. 因为 OE 平分∠AOC,OF 平分∠BOC, 所以∠COF=12∠BOC=12α,∠COE=12∠AOC=12(180°-α)=90°-12α, 所以∠EOF=∠COF+∠COE=12α+(90°-12α)=90°,即 OE⊥OF. 由此发现:无论∠BOC 的度数是多少,∠EOF 总等于 90°, 即邻补角的平分线互相垂直.

高三政治(哲学)周测1印

高三政治(哲学)周测1印

高三政治(哲学)周测试题一、选择题1.据说,苏小妹曾用对对联的方式刁难丈夫秦少游,她出的上联是“闭门推开窗前月”,秦少游苦思冥想,急得额上沁出汗珠。

突然,听到一声“啪”响,只见一粒石子飞入湖中,顿时波光粼粼,玉盘似的月影凌乱于水中。

秦少游冲口说道:“投石冲开水底天。

”这个故事包含的哲学道理是A.意识可以决定物质 B.意识对物质具有反作用C.规律具有客观性 D.物质决定意识,意识是物质的反映2.聪明的人在生活中既要学会选择,也要学会放弃,其实放弃也是一种艰难的选择。

这句话表明A.意识活动具有自觉选择性和主动创造性B.回避矛盾有时也不失为一种聪明的做法C.对立也是统一,对立和统一不是绝对的D.不同的价值观具有不同的导向作用3.《阿甘正传》中的阿甘,是个平凡甚至简单的小人物,智商很低,却有很多高智商者缺乏的美德:诚实、守信、认真、勇敢,重视感情。

他不停地奔跑,不停地向前,单纯,而又执著,不知让多少观众深深感动。

这表明A.特殊人物的意志能够突破规律的制约B.人的意识无所不能C.高昂的精神可以催人向上,使人奋进D.意识活动是通过人脑对外界刺激的一系列反射活动实现的4.李白的《望庐山瀑布》中有“遥看瀑布挂前川”之句,后人评述此句的意境全在“挂”字之上。

这是因为此字体现了①动中有静,静中有动②物质是运动的物质,运动是物质的存在方式③绝对运动与相对静止是统一的④运动是物质的运动,物质是运动的承担者A.①② B.②④ C.③④D.①③5.一次,钱学森为解决导师交给他的难题,前后写了五份演算文稿。

当他把定稿装入文件袋后,特意在封面上工工整整写道“Final”(定稿),但他马上又觉得不妥,便在旁边补了一行“Nothing is final!!!”(没有什么认识是最后的)。

这句“Nothing is final!!!”体现的哲学道理是A.真理是客观的B.真理是绝对的 C.真理是发展的D.真理是普遍的6.据报道,美国哥伦比亚大学的社会学家利用互联网做了一次实验,结果显示,只要通过“电子邮件的6次信息接力”,一个人就可以同世界上任何一个陌生人联系上。

吉林省2022-2023学年高一下学期周测一化学试卷(含解析)

吉林省2022-2023学年高一下学期周测一化学试卷(含解析)

化学周测一、单选题1.某地盐湖中含有大量的NaCl 以及少量杂质()2224CaCl MgCl Na SO 、、,欲在实验室模拟从该盐湖水中获得纯净的NaCl ,设计了如下步骤:①取20mL 盐湖水于100mL 烧杯中 ②加入过量NaOH 溶液 ③在滤液中加入盐酸至不再产生气泡 ④加入过量23Na CO 溶液 ⑤加入过量2BaCl 溶液 ⑥过滤 ⑦转移溶液至蒸发皿,蒸发溶液至有大量晶体出现 其中正确的操作步骤是A .①②③④⑤⑥⑦B .①⑤④②⑥③⑦C .①④②⑤⑥③⑦D .①②⑤④③⑥⑦2.化学与生活密切相关。

下列有关说法正确的是A .S 粉可除去温度计破碎时洒落的HgB .2SiO 可用作计算机芯片C .2SO 具有氧化性,可用作食品抗氧化剂D .电池体积很小,所含污染物有限,可随意丢弃3.俗话说“一场雷雨一场肥”,其中蕴含的化学知识如下:①22N +O 2NO 闪电(吸热反应)、②222NO+O =2NO 、③2233NO +H O=2HNO +NO ,硝酸再与土壤中的矿物质作用转化成农作物可利用的硝酸盐。

下列有关说法错误的是A .反应①属于氮的固定B .反应①中NO 既是氧化产物又是还原产物C .反应①中反应物的总键能小于生成物的总键能D .由反应③可知2NO 不可用排水法收集4.下列物质能使高锰酸钾溶液褪色,且褪色原理相同的是①活性炭 ②2H S 溶液 ③2SO ④稀硫酸 ⑤23Na SO 溶液A .②③⑤B .②③④C .①②④D .①③⑤ 5.设N A 为阿伏加德罗常数的值。

下列说法中正确的是A .1mol·L -1的H 2SO 4溶液中,含SO 24-的数目为N AB .6.4gCu 与足量S 粉充分反应,转移的电子数目为0.2N AC .46g 由NO 2与N 2O 4组成的混合气体中含N 原子的数目为N AD .标准状况下,将2.24LCl 2通入足量水中,生成的HClO 分子的数目为0.1N A6.图是硫元素的价类二维图。

五年级上数学周测卷1

五年级上数学周测卷1

泉水文化培训学校五年级上学期数学周测卷(1)姓名: 分数:(满分50)一、填空题(每空一分)1.两个数相除商是0.5,如果被除数扩大10倍,除数也扩大10倍,那么商是();如果被除数扩大10倍,而除数不变那么商是()。

2.一个两位小数,用四舍五入法得到它的近似值是3.2,这个小数最大可能是(),最小可能是()。

3.0.87保留到千分位约等于(),0.653保留到万分位约等于()。

4.被除数扩大6倍,除数扩大2倍,商就()。

5.9.18除以2.7,除数是()位小数,被除数和除数的小数点需要同时向()移动(),变成()÷()。

6.在计算一道除法试题时,小马虎把除数2.8看成了28,结果商是5.25,那么正确的商应该是()。

7.比大小7.4÷0.85()7.4 x×0.98()x÷0.98 (x不为0) 18.6÷2.3()1.86÷0.238.2.4除一个数,商是一个两位小数,保留一位小数是4.5,被除数最大是()。

(除和除以)二、选择题(没空2分)1.下面各数是循环小数的是()。

A.0.31616B.7.67272···C.4.020020002···D.5.55552.计算42.84÷7,可以看作是把4284个百分之一平均分成7份,每份是()个百分之一。

A.6.12B.61.2C.612D.61203.近似数4.2是把一个小数保留一位小数时所得到的,下列数中()不可能是这个小数。

A.4.239B.4.249C.4.149D.4.154.下面这些数中最大的是()。

A.5.045B.5.045C.5.045D.5.0455.0.026÷0.08商是0.3时,余数是()。

A.2B.0.2C.0.02D.0.0026.若x÷0.9=y(x不为0),则下列判断正确的是()。

人教8年级英语周测Unit 1 (含答案)

人教8年级英语周测Unit 1 (含答案)

2020-2021学年八年级上英语测验Unit 1Class _________________ Name _________________ Mark __________________一、单项选择(20分)( )1. Mike enjoys reading. He thinks reading is _______ enjoyable activity.A. aB. anC. theD. /( )2. I bought two notebooks for _______. I also bought one for _______.A. me; myselfB. you; myselfC. me; yourselfD. you; yourself( )3. Most of the students went to play on the playground. Only _______ of them stayed in the classroom.A. a fewB. fewC. a littleD. little( )4. —It's time to have our lesson. Is _______ here? —No, Miss Smith. Bert and Jason aren't here.A. someoneB. anybodyC. nobodyD. everyone( )5. —Novak Djokovic is a famous tennis player.—A tennis player? I don't like tennis. And I know ____ about him.A. somethingB. anythingC. nothingD. everything( )6. —_______ was the food in that new restaurant? —It tasted good.A. HowB. WhatC. WhereD. When( )7. Li Hua doesn't feel like _______. She just wants to stay at home and watch the movie Captain Marvel.A. to go outB. going outC. to wake upD. waking up( )8. Please listen carefully to the teacher in class and try _______ anything.A. missingB. missC. to missD. not to miss( )9. Look! There are too many people on this bus. Let's _______ the next one.A. wait forB. call atC. help withD. worry about( )10. —Are you happy with my answer, Ruby? —_______. You shouldn't answer me in just a word.A. No problemB. I'd love toC. Not reallyD. I'm not sure二、完形填空。

英语周测一及答案

英语周测一及答案

英语周测⼀及答案⼤庆外国语学校⾼⼆年级下学期周测英语试题本试卷分Ⅰ、Ⅱ卷,总分150分,考试时间90分钟。

第I卷第⼀部分:英语知识运⽤(共两节,满分60分)第⼀节:单项填空(共20⼩题,每题2分,满分40分)1.—Has Mary come back yet?—Yes.She has got many books from her elder schoolmates,which ____ 1,000.A.add up B.add up to C.add to D.add2. Our bodies are strengthened by taking exercise. ,our minds are developed by learning. A.Probably B.Likely C.Similarly D.Generally3. You can hardly imagine the difficulty the man had smoking.A.given up B.giving up C.to give up D.give up4.The girl left a special impression on the teachers in the contest, because she had a(n) _________ voice.A. standardB. originalC. distinctiveD. obvious5. New technologies have made possible to turn out new products faster and at a lower cost. A.that B.this C.one D.it6.At school,some students are active some are shy,yet they can be good friends with each other. A.while B.although C.so D.as7. This is the first time we________a film in the cinema together as a family.A.see B.had seen C.saw D.have seen8. Firemen said the fire was under control,but they warned that the change in weather might________a new fire. A.bring in B.arise from C.result from D.lead to9.The policeman’s________traffic directions made all the drivers quite________.A.confused;confused B.confusing;confusingC.confusing;confused D.confused;confusing10. Michael’s new house is like a huge palace,________ with his old one.A.comparing B.compares C.to compare D.compared11. Leaves are found on all kinds of trees,but they differ greatly________size and shape.A.on B .from C.by D.in12. Everyone arrived late at the party for ________ reasons. Which is wrong?A. a variety ofC. variousD. varies13. The two idioms have something _____ with each other.A. in commonB. in ordinaryC. in generalD. in normal14. Does it make any________he accepts or refuses the invitation?A.difference that B.difference whether C.difference if D.difference15.. - I_____so busily recently that I ____ no time to help you with your math.- That’s OK. I can manage it by myself.A.have been working; have B.have worked; hadC.am working; will have D.had been working; had had16. How did the rumor ________________ so quickly?A. get acrossB. get overC. get aroundD. get down17. He will be punished by law because he made no _____ at all to rescue the dying boy.A. remarkB. attemptC. action D sign.18. As for me, I have developed the habit of reading before going to bed. Therefore, I’m ___ Mom’s family reading suggestion.A. in favour ofB. for fear ofC. in exchange forD. in preparation for19. The worker ________ his ideas to the manager very dearly.A.preserved B.presented C.provided D.supplied20. He suggested the boy __________ praised.A.referred to beB.referred to wasC. refer to being第⼆部分:阅读理解(共两节,满分40分)第⼀节:(共15⼩题;每⼩题2分,满分30 分)ACalifornia has been facing a drought(⼲旱) for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system. Luckily, new research has found deep water reserves under the state which could help solve their drought crisis. Previous drilling of wells could only reach depths of 1,000 feet, but due to new pumping practices, water deeper than this can now be extracted(抽取). The team at Stanford investigated the aquifers(地下蓄⽔层) below this depth and found that reserves may be three times what was previously thought.The aquifers range from 1,000 to 3,000 feet below the ground, which means that pumping will be expensive and there are other concerns. The biggest concern of pumping out water from this deep is the gradual settling down of the land surface. As the water is pumped out, the vacant space left is compacted(压实) by the weight of the earth above.Even though pumping from these depths is expensive, it is still cheaper than desalinating (脱盐) the ocean water in this coastal state. Some desalination factories exist where possible, but they are costly to run and can need constant repairs. Wells are much more reliable sources of freshwater, and California is hoping that these deep wells may be the answer to their severe water shortage.One problem with these sources is that the deep water also has a higher level of salt than shallower aquifers. This means that some wells may even need to undergo desalination after extraction, thus increasing the cost. The result of a thorough study of groundwater from over 950 drilling logs has just been published. New estimates of the water reserves in the state now go up to 2,700 billion cubic meters of freshwater.21. How could California’s drought prob lem be solved according to some researchers?A. By building more reserves of groundwater.B. By drawing water from the depths of the earth.C. By developing more advanced drilling machines.D. By improving its water distribution system.22. What is mentioned as a consequence of pumping water from deep underground?A. The sinking of land surface.B. The harm to the ecosystem.C.The damage to aquifers.D. The change of the climate. 23. What does the author say about deep wells? A. They run without any need for repairs. B. They are the final solution to droughts. C. They are entirely free from pollution. D. They provide a steady supply of freshwater. . B⾼⼆下开学初周测-第1页(共10页) 1英语试题-第2页(共10页)In one of the old buildings near our school, one could see an old man sitting by a large window on the first floor. His name was James. During the three years at school, I had hardly ever found him missing from his usual position.He was a high-ranking government official and lived happily with his wife. Once there was a bus accident, in which a number of passengers were seriously injured and were taken to the hospital for treatment. James was responsible for the rescue operation. It was a big hospital, but James was shocked to notice how ill-equipped it was. There were no enough life-saving drugs and life-supporting equipment. The injured and their companions had to struggle there. James attempted to help. However, though he emptied his pockets, many of them died that day.That was a turning point in his life. He made a decision to devote his life to helpingothers,particularly the poor and needy patients and their companions. He began spending much of his income on these people. Since this required a lot of time and energy, he found it difficult to fulfill his official duties and therefore chose to retire, which, in turn, reduced his income considerably.His wife was deeply worried. Most of the time, James was out and paid least attention to home affairs. Meanwhile, as he was spending a lot helping others, she had to struggle even to meet the household expenses. Though she was not opposed to his helping the poor, she urged him not to overlook his own life and home, but it had no effect on him. One day they had a heated argument and in the end she left him, never to return. Though he continued with his work, this was a great blow and did serious harm to his health and enthusiasm and he was soon forced to stay indoors. That was when he took his position by the window, spending his time looking outside.A few weeks after my graduation, I returned to school, only to find the buildings gone. I heard that they were torn down. All the people left except James. He refused to go and the next morning, he was found at his usual place by the window, dead. 24.James chose to retire in order to .A.take care of the injured passengers. B.find a better job to increase his income.C.spare more time and energy to help others. D.stay away from the difficult official duties. 25.James’ wife left because.A.she was strongly against his deeds. B.James paid too little attention to his work.C.her work to support their daily life was too tiring..D.James failed to keep a balance between charity and home.26.The underlined word “this” in Paragraph 4 refers to .A.His decision to retire B.The departure of his wifeC.The argument with his wife D.His devotion to helping others27. What is possibly the reason why James sat by the window every day?A. He expected his wife to return.B. He looked forward to going out.C. He desired to watch the students.D. He attempted to know the outside lifeCA growing number of smaller companies are adopting a four day workweek. Now the results of a recent trial at Microsoft suggest it could work even for the biggest businesses.The company introduced a program this summer in Japan called the "Work Life Choice Challenge", which shut down its offices every Friday in August and gave all employees an extra day off each week. The results were promising: while the amount of time spent at work was cut dramatically, productivity—measured by sales per employee went up by almost 40% compared to the same period of the previous year, the company said in a statement last week.In addition to reducing working hours, managers urged staff to cut down on the time they spent in meetings and responding to emails. They suggested that meetings should last no longer than 30 minutes. Employees were also encouraged to cut down on meetings altogether by using an online messaging app.The effects were widespread. More than 90% of Microsoft's 2,280 employees in Japan later said they were impacted by the new measures, according to the company. By shutting down earlier each week, the company was also able to save on other resources, such as electricity.Japan has long battled with a cruel--and in some cases, deadly--culture of overwork. The problem is so severe that the country has even coined a term for it: karoshi death by overwork from stress-induced illnesses or severe depression.The issue attracted international attention in 2015, when an employee at Japanese advertising giant Dentsu committed suicide on Christmas Day. Tokyo officials later said that the staff had worked excessive amounts of overtime. Two years later, a reporter at a Japanese broadcaster died after working punishing long hours. Her employer said she had clocked in 159 hours of overtime the month before her death.That has led businesses to start searching for solutions. Sonic companies have begun offering employees more flexibility, and the government has launched a campaign called "Premium Friday", which encourages workers to leave early every last Friday of the month.28. Microsoft introduced the "Work Life Choice Challenge" program this summer by .A. holding a long-distance meeting every Friday.B. giving three days off to its employees every week.C. shutting down its office areas every weekend.D. organizing a corporate tour every week.29. What is the result of adopting a four-day workweek?A. It is a waste of energy.B. The workers earned less money.C. The working efficiency increases greatly.D. Japan’s unemployment rate is rising.30. How can the time the staff spent on meetings be reduced?A. By canceling meeting.B. By using emails to respond.C. By cutting down working hours.D. By using a certain online messaging app.31. What is the staff’s attitude to the new measures?A. supportive.B. negativeC. criticalD. indifferentDAnger is an emotion that can be hard to control. Despite this, we should learn how to manage anger in a constructive manner. In the most intense moments of anger, we usually have two choices — to fight or to run. Some choose the option of violence, which is a negative reaction to anger; and others choose to run. But the option of walking away and calming down is the more productive method of handling anger. It is difficult to walk away, especially when your heart is racing, and your anger is boiling over.There are some other constructive ways of handling anger in any situation. First, you have to stop for a brief moment and think before you act. Take that moment and calm down if you feel yourself being pushed.At that moment you should admit you are angry. If you refuse to admit you are angry or hurt, or if you make it appear that everything is all right, you are not managing angry in a productive way. You should first admit you are angry and let your feelings out before you blow up. For example, you can stay in a quiet place by yourself and shout; or you can talk to close friends to pour out your rage (愤怒). If you do not⾼⼆下开学初周测-第3页(共10页) 英语试题-第4页(共10页)2acknowledge your anger, it only builds up inside you and will eventually explode like a volcano.Then, in order to manage your angry, you can ask yourself an important question that we all must ask ourselves ― What made me angry? When you get the answer, and then ask yourself ― Why did that made me angry? Through such logical reasoning, one tends to calm down and move towards a sensible solution.32. The underlined sentence in Paragraph 1 is to ________.A. provide an exampleB. make a comparisonC. introduce a new statementD. develop a previous statement33. If people face anger, ________.A. they know how to manage itB. it is often quite hard to get awayC. they can only choose to fight or to runD. they believe running means being a coward34. It can be inferred from Para. 3 and 4 that ________.A. one can handle anger by oneself or in groupsB. the first step of handling anger is to calm downC. a person may handle anger by asking random questionsD. acknowledging anger will do harm to a person’s health35. The main purpose of the passage is _______.A. to tell readers what anger isB. to explain why anger is hard to controlC. to show the importance of handling angerD. to offer tips on handling anger第⼆节(共5⼩题;每⼩题2分,满分10分)根据短⽂内容,从短⽂后的选项中选出能填⼊空⽩处的最佳选项。

高一数学周测卷(一) - 答案

高一数学周测卷(一) - 答案

2019-2020高一数学周测卷(一)参考答案1.C【分析】根据自然数集、正整数集、整数集以及有理数集的含义判断数与集合关系.【详解】A :0∉N +,A 错误;B :32∉Z ,B 错误;C :π∉Q ,C 正确;D :0∈N ,D 错误; 故选:C .【点睛】本题考查自然数集、正整数集、整数集、有理数集的含义以及数与集合关系判断,考查基本分析判断能力,属基础题.2.B【解析】【分析】根据正整数集、整数集以及有理数集的含义判断数与集合关系.【详解】①1-不是正整数,∴1-∈N *错误;是无理数,Z 正确; ③32是有理数,∴32Q ∈正确;④π是无理数,∴π∈Q 错误;∴表示正确的为②③. 故选:B .【点睛】本题考查正整数集、整数集、有理数集的含义以及数与集合关系判断,考查基本分析判断能力,属基础题.3.B【解析】【分析】由题根据集合M,N 的关系,可得2a ≥,即得解.【详解】已知{|12}M x x =-<<,{}|N x x a =<,且M N ⊆,所以2a ≥.故实数a 的取值范围为[2)+∞,, 故选:B .【点睛】本题主要考查集合的关系,意在考查学生对该知识的理解掌握水平,属于基础题. 4.C【解析】【分析】利用一元二次不等式的解法,结合元素为自然数化简集合 ,只需求出集合 的子集个数即可.【详解】全集A ={x ∈N|x 2+2x -3≤0}={0,1},B ={y |y ⊆A }中的元素为集合A 的子集,所以集合B 中元素的个数为22=4,故选C.【点睛】集合的基本运算的关注点:(1)看元素组成.集合是由元素组成的,从研究集合中元素的构成入手,是解决集合运算问题的前提;(2)有些集合是可以化简的,先化简再研究其关系并进行运算,可使问题简单明了,易于解决;(3)注意数形结合思想的应用,常用的数形结合形式有数轴、坐标系和 图. 5.C【解析】 , , ,真子集个数为 ,故选 . 6.D【解析】【分析】由集合S ={0,1,2,3,4,5},结合x ∈A 时,若有1x A -∉,且x +1∉A ,则称x 为A 的一个“孤立元素”,我们用列举法列出满足条件的所有集合,即可得出答案.【详解】∵当x ∈A 时,若有x -1∉A ,且x +1∉A ,则称x 为A 的一个“孤立元素”,∴单元素集合都含“孤立元素”.S中无“孤立元素”的2个元素的子集为{0,1},{1,2},{2,3},{3,4},{4,5},共5个,S中无“孤立元素”的3个元素的子集为{0,1,2},{1,2,3},{2,3,4},{3,4,5},共4个,S中无“孤立元素”的4个元素的子集为{0,1,2,3},{0,1,3,4},{0,1,4,5},{1,2,3,4},{1,2,4,5},{2,3,4,5},共6个,S 中无“孤立元素”的5个元素的子集为{0,1,2,3,4},{1,2,3,4,5},{0,1,2,4,5},{0,1,3,4,5},共4个,S中无“孤立元素”的6个元素的子集为{0,1,2,3,4,5},共1个,故S中无“孤立元素”的非空子集有20个,故选D.【点睛】本题考查的知识点是元素与集合关系的判断,我们根据定义列出满足条件的所有不含”孤立元素”的集合,进而求出不含”孤立元素”的集合个数.7.B【解析】【分析】利用集合间的关系可知:集合A中除了含有1,2两个元素以外,可能含有另外的元素,据此即可求出.【详解】集合A中必须有元素1和2,可有3,4,5这三个元素中的0个,1个,2个,-=个,故集合A的个数有3217故选:B.【点睛】熟练掌握集合间的包含关系是解题的关键,本题是一道基础题.8.C【解析】根据题意,集合,且,所以,即,所以,且,所以,则,故选C.点睛:本题主要考查了集合运算的特征与集合相等的含义,注意从特殊元素下手,有利用找到解题的切入点是解答此类问题的关键,本题的解答中根据集合相等,注意到后面集合中有元素,由集合相等的定义,集合集合中元素的特征,可得,进而分析可得的中,即可得到 的值.9.0,2,2-【解析】【分析】解出集合A ,由B A ⊆可得集合B 的几种情况,分情况讨论即可得解.【详解】{}24,A x x x R ==∈={}-2,2,若B A ⊆,则{}{}{}B=2-2-2,2φ,,,,当B φ= 时,0k =;当 {}2B =时,242k k =∴=;当{}-2B =时,-24-2k k =∴=; 当{}-22B =,时,无k 值存在; 故答案为0,2,2-.【点睛】本题考查了集合子集的应用,注意分类讨论要全面,空集的情况易漏掉.10.[1,)-+∞【解析】【分析】本题的关键是根据集合{|34},{|211}A x x B x m x m =-≤≤=-<<+,且B A ⊆,理清集合A B 、的关系,求实数m 的取值范围.【详解】解:集合{|34},{|211}A x x B x m x m =-≤≤=-<<+,且B A ⊆,①B 为空集时,211m m -≥+,故2m ≥,②B 不为空集时,2m <,且21314m m -≥-⎧⎨+≤⎩, 故12m -≤<.综上,实数m 的取值范围:1m ≥-.即实数m 的取值范围是[1,)-+∞.-+∞.故答案为:[1,)【点睛】本题主要考查集合间的包含关系,要正确解决本题,必须对集合的相关概念有深刻的理解,认清集合的特征,属于基础题.11.(1);(2);(3).【解析】【分析】(1)用列举法表示集合,自然数集;(2)用描述法表示集合,第三象限内上点横纵坐标都小于零;(3)用描述法表示集合,能被2整除的整数叫偶数.【详解】(1);(2);(3)【点睛】本题考查了用不同方法表示集合,其时用描述法表示集合时,也不是唯一的一种表示方法,比如本题的偶数集也可以表示为等等,再有本题的第一个集合也可以用描述法进行表示:等等. 12.【解析】【分析】由,有或,显然,解方程求出实数的值,但要注意集合元素的互异性.【详解】因为,所以有或,显然,当时,,此时不符合集合元素的互异性,故舍去;当时,解得,由上可知不符合集合元素的互异性,舍去,故 .【点睛】本题考查了元素与集合之间的关系,考查了集合元素的互异性,考查了解方程、分类讨论思想.13.1m £【解析】【分析】计算集合A ,讨论集合B 是否是空集两种情况得到答案.【详解】当0m ≤时,B ∅=,显然B A ⊆.当0m >时,因为2230{|}3{1|}A x x x x x <<<=--=-. 当B A ⊆时,用数轴表示有所以13m m m m -≥-⎧⎪≤⎨⎪-<⎩所以01m <≤.综上所述,m 的范围为1m £.【点睛】本题考查了集合的包含关系,忽略集合B 为空集的情况是容易犯的错误.14.(1) 是 的真子集;(2) .【解析】【分析】(1)算出 、 后可判断 是 真子集.(2)就 、 分类讨论即可.【详解】(1) , 是 真子集(2)当 时,满足 ⊆ ,此时 ;当 时,集合 ,又 ⊆ ,得 或 ,解得 或综上,实数的取值集合为.【点睛】本题主要考查集合间的包含关系,此类问题属于基础题,注意讨论含参数的集合之间的包含关系时要优先考虑空集(或全集)的情形.15.(1);(2).【解析】【分析】首先通过解一元二次方程,得带集合A,根据空集的概念,以及包含关系的本质所在,需要对B进行分类讨论,按两种情况进行讨论,从而求得结果【详解】由x2-3x+2=0,得x=1,或x=2.∴A={1,2}.∵B⊆A,∴对B分类讨论如下:(1)若B=∅,即方程ax-2=0无解,此时a=0.(2)若B≠∅,则B={1}或B={2}.当B={1}时,有a-2=0,即a=2;当B={2}时,有2a-2=0,即a=1.综上可知,符合题意的实数a所组成的集合C={0,1 ,2}【点睛】该题考查的是有关集合具备包含关系时有关参数的取值问题,在解题的过程中,需要注意的是先确定集合A,之后需要对B进行讨论,分其为空集与不是空集两种情况.。

牛津译林版英语八上-周测试题(一)2016.9.12

牛津译林版英语八上-周测试题(一)2016.9.12

2016-2017学年八年级上英语周测试题(一)2016.9.12时间:45分钟满分:100分班级:____________ 姓名:_____________ 得分:____________一、单项选择。

(每题2分,共30分)( ) 1. --- Mum, can I have something ? --- Sorry. There is in the fridge.A. eating;nothing elseB. to eat;nothing elseC. eating;else nothingD. to eat;else nothing( ) 2. There aren’t enough chairs. Would you please _________ ones here?A. to bring another threeB. bring more threeC. to take three otherD. bring three more( ) 3. Jim is _____ honest man, I believe _______.A. a; his wordsB. an; what he saysC. the; his wordsD. an; what does he say ( ) 4. He always tells funny things to me and always ___________.A. make me to laughB. make me laughC. makes me laughD. makes me laughs( ) 5. Simon is willing to help others _________ with their English.A. for needB. in needC. of needD. on need( ) 6. This question is ______ than that one .A. very easierB. much easyC. very easyD. much easier( ) 7. Please try your best to finish the work with ________ money and ________ people.A. few; littleB. a few; a littleC. less; fewerD. fewer; less( ) 8. I didn’t know which T-shirt was ________, so I took them both.A. goodB. the cheapestC. nicerD. the best( ) 9. The Yellow River is the second ___________river in China .A. longerB. longestC. the most longD. the longest 金戈铁骑制作( ) 10. Tom is stronger than _________ in his class.A. any other teenagerB. any teenagersC. any teenagerD. other teenagers ( ) 11. Mr. Wang is one of ________ in our school.A. good teachersB. better teachersC. the best teachersD. the better( ) 12. When winter comes, the nights get ________.A. long and longB. short and shortC. longer and longerD. shorter and shorter ( ) 13. trees we plant , our country will be.A. More, more beautifulB. More, the most beautifulC. The more, the more beautifulD. The more, more beautiful( ) 14.---Do you like Zhang Bichen’s song ?---Yes. She is the winner of The V oice of China III. I can’t think of anyone with a ____voice.A. bestB. betterC. worseD. worst ( ) 15. -- _______________________? -- He is tall and handsome.A. What does he look like ?B. What is he look ?C. What is he like ?D. What does he like ?二、根据句意、首字母或中文提示完成单词。

七上语文周测第一周(原卷版)

七上语文周测第一周(原卷版)

2024-2025学年上学期七年级语文周周练(第一周)(对应内容:《春》《观沧海》《次北固山下)一、积累与运用(37分)1.阅读语段,按要求完成题目。

(5分)冬末春初,万物yùnniàng着生机。

冰雪消融,眨眼间,湖水涨满,鸟儿们从窠.巢中飞出,卖弄着清脆的喉咙,相互应和,唱出一支支迎春曲。

一年之计在于春,老老小小都出来舒活筋骨。

春雨贵如油,在黄晕.()的光下,农人依然pīsuōdàilì在田间劳作。

(1)给加点的字注音,根据拼音写汉字。

(4分)窠.巢黄晕.yùnniàng pīsuōdàilì(2)语段中画横线句子运用的修辞方法是(1分)2.按要求默写。

(8分)(1)《观沧海》中借助奇特的想象来表现大海吞吐日月星辰的气概,创造了一个极其开阔的意境的诗句是:,;,。

(2)《次北固山下》一诗中道出新事物孕育于旧事物解体之时的生活哲理的诗句是:,。

(3)春天像健壮的青年,,。

(朱自清《春》)3.下列句中加点词语运用有误的一项是()(3分)A.春天来了,春笋破土而出,生机勃勃....,迸发出向上的精神力量。

B.春光如此好,我们不要辜负它,周末有空就扶老携幼、呼朋引伴....,一起去踏春赏花吧。

C.在校园艺术节上,张静梅同学凭着花枝招展....的表演,获得了第一名的优异成绩。

D.奥运会上的体育健儿们,个个精神抖擞....,斗志昂扬,迸发出奋力拼搏、勇夺桂冠的豪情。

4.下列句子中没有语病的一项是()(3分)A.近年来,过度使用一次性塑料制品已经严重造成了环境污染,必须引起全社会警惕。

B.夜市上人头攒动,热闹非凡,所售商品种类繁多,吃的、喝的、玩的一应俱全。

C.通过学习《春》这篇课文,使我深深感受到了春天的生机与多彩。

D.会不会用心观察,能不能重视积累,是提高写作水平的关键。

5.下列关于比喻的修辞手法判断有误的一项是()(3分)A.春天像刚落地的娃娃,从头到脚都是新的,他生长着。

湖北省武汉市部分学校2018-2019学年度八年级数学(上)第12章《全等三角形》周测(一)(含答案)

湖北省武汉市部分学校2018-2019学年度八年级数学(上)第12章《全等三角形》周测(一)(含答案)

湖北省武汉市部分学校2018-2019学年度八年级数学(上)第12章《全等三角形》周测(一)(含答案)(测试范围:12.1全等三角形~12.2三角形全等的判定 参考时间:90分钟,满分:120分)一、选择题(每小题3分,共30分)1.如图,△ABC ≌△DEF ,图中和AF 相等的线段是( )A.线段BCB.线段ABC.线段CD D .线段DE第1题图A BCDEF 第2题图ABCEF第4题图ABCDO第5题图ABDE F2.如图,已知△ABC ≌△DEF ,AC =DF ,AB =DE ,BC =7,EC =3,则CF 的长是( ) A.4 B.3 C.4.5 D .73.已知△ABC ≌△EDF ,△ABC 的周长是20,AB =5,BC =8,则DF 的长是( ) A.5 B.7 C.8 D .5或84.如图,AD ,BC 相交于点O ,已知∠A =∠C ,要根据“ASA ”证明△AOB ≌△COD ,还要添加一个条件是( ) A.AB =CD B.BO =DO C.AO =CO D .∠ABO =∠CDO5.如图,在△ABC 中,∠B =∠C ,D 为BC 中点,由点D 分别向AB 、AC 作垂线段,则能够说明△BDE ≌△CDF 的理由是( )A.AASB.SASC.ASA D .SSS 6.如图是由4个相同的小正方形组成的网格图,则∠1+∠2的度数是( ) A.120° B.150° C.180° D .200°7.如图,有一池塘,要测池塘两端A 、B 的距离,可先在平地,上取一个可以直接到达A 和B 的点C ,连结AC 并延长到D ,使CD =C A.连结BC 并延长到E ,使EC =CB ,连结DE ,量出DE 的长,就是A 、B 的距离.请判断这样做的依据是( )A.AASB.SASC.ASA D .SSS第6题图21第7题图BC A第8题图ABCDE第9题图mBCDE8.如图,已知AB =AC ,AD =AE ,∠BAC =∠DAE .下列结论错误的是( ) A.∠BAD =∠CAE B.△ABD ≌△ACE C.AB =BC D .BD =CE9.在△ABC 中,AB =AC ,D 、A 、E 三点都在直线m 上,并且有∠BDA =∠AEC =∠BAC ,AE =3,EC =4,则DE 的长是( )A.8B.7C.4 D .310.如图,在四边形ABCD 中,AD ∥BC ,∠C =90°,BC =CD =6,过点B 作EB ⊥AB ,交CD 于点E .若DE =4,则ADA.6B.8C.9 D .10二、填空题(每小题3分,共18分)11.如图,点B ,A ,D ,E 在同一直线上,BA =DE ,BC ∥EF ,要使△ABC ≌△DEF ,则只需添加一个适当的条件是 .(只填一个即可)第10题图ABCDE第11题图AB CDE第12题图EDCA第13题图ADE12.如图,已知∠B =∠C ,BE =CD ,AB =7,AE =2,则CE = .13.如图,BE ,CD 是△ABC 的高,且∠ABC =∠ACB ,判定△BCD ≌△CBE 的依据是 .(填写字母即可)14.如图,E 点为△ABC 的边AC 中点,CN ∥AB ,过E 点作直线交AB 与M 点,交CN 于N 点,若MB =7cm ,CN =4cm ,则AB = cm.第14题图A BCMEN 第15题图NABC DEMxyABCD O15.如图,线段AB =8cm ,射线AN ⊥AB 于点A ,点C 是射线AC 上一动点,分别以AC ,BC 为直角边作等腰直角三角形,得△ACD 与△BCE ,连接DE 交射线AN 于点M ,则CM 的长为 cm. 16.如图,在△ABC 中,∠ACB =90°,AC =B C.点C 的坐标为(-1,0),点A 的坐标为(-4,2),则B 点的坐标是 . 三、解答题(共8题,共72分)17.(本题8分)如图,△EFG ≌△NMH ,在△EFG 中,FG 是最长的边,在△NMH 中,MH 是最长的边,∠F 和∠M 是对应角,且EF =2.4cm ,FH =1.9cm ,HM =3.5cm. (1)写出对应相等的边及对应相等的角; (2)求线段NM 及线段HG 的长度.FHGME18.(本题8分)如图,E 、F 是线段AB 上两点,AE =BF ,AD =BC ,∠A =∠B ,求证:∠D =∠C.A BCDE F19.(本题8分)如图,AC =DF ,AC ∥DF ,AE =D B. (1)求证:BC =EF ; (2)求证:BC ∥EF .A BDEF20.(本题8分)已知∠A =90°,AB =BD ,ED ⊥BC 于D ,求证:DE +CE =A C.ACD E21.(本题8分)如图,点C 、E 、B 、F 在同一直线上,AC ⊥CF 于点C ,DF ⊥CF 于点F ,AB 与DE 交于点O ,且EC =BF ,AB =DE ,求证:AC =DF .ACDEF O22.(本题10分)如图,BE =CD ,AE =AD ,∠1=∠2,∠2=110°,∠BAE =70°. (1)求证:△BAE ≌△CAD ; (2)求∠CAE 的度数.2AD E123.(本题10分)如图1,AB =4cm ,AC ⊥AB ,BD ⊥AB ,AC =BD =3cm.点P 在线段AB 上以1cm/s 的速度由点A 向点B 运动,同时,点Q 在线段BD 上由点B 向点D 运动.它们运动的时间为t (s ).(1)若点Q 的运动速度与点P 的运动速度相等,当t =1时,△ACP 与△BPQ 是否全等,请说明理由,并判断此时线段PC 和线段PQ 的位置关系; (2)如图2,将图1中的“AC ⊥AB ,BD ⊥AB ”为改“∠CAB =∠DBA =60°”,其他条件不变.设点Q 的运动速度为x cm/s ,是否存在实数x ,使得△ACP 与以B ,P ,Q 为顶点的三角形全等?若存在,求出相应的x ,t 的值;若不存在,请说明理由.图2图1AABCD Q24.(本题12分)如图1,在平面直角坐标系中,已知A (a ,0),C (0,b ),且a ,b 5a (4a -5b )2=0,点B 在y 轴正半轴上,且S △ABC =20. (1)求证:OB =OC ;(2)已知点P (m ,0),(其中-4<m <0),连接PB ,作PD ⊥PB 且PD =PB ,求点D 的坐标;(用含m 的式子表示); (3)如图2,在(2)的条件下,连接CD ,求证:∠PDC =45°+∠PBO .xy图2图1ABC D PO1-5CACCA 6-10CBCBB11.BC=EF12.513.AAS14.1115.416.(1,3)17.解:(1)略;(2)NM=EF=2.4cm;GH=HM-FH=3.5-1.9=1.6cm.18.证明:略.19.解:(1)略;(2)略.20.证:连BE,△ABE≌△DBE(HL),DE=AE.21.证:CE+BE=BF+BE,∴CB=FE,证Rt△ABC≌Rt△DEF(HL),∴AC=DF.22.解:证△BAE≌△CAD(SAS),∴∠CAD=∠BAE=70°,∠ADE=∠AED=70°,∴∠DAE=40°,∴∠CAE=∠CAD-∠DAE=70°-40°=30°.23.解:(1)当t=1时,AP=BQ=1,BP=AC=3,又∠A=∠B=90°,在△ACP和△BPQ中,AP=BQ,∠A=∠B,AC=BP,∴△ACP≌△BPQ(SAS),∴∠ACP=∠BPQ,∴∠APC+∠BPQ=∠APC+∠ACP=90°,∴∠CPQ=90°,即线段PC与线段PQ垂直;(2)①若△ACP≌△BPQ,则AC=BP,AP=BQ,3=4-t,t=xt,解得t=1,x=1;②若△ACP≌△BQP,则AC=BQ,AP=BP,3=xt,t=4-t,解得t=2,x=1.5;综上所述,存在t=1,x=1或t=2,x=1.5,使得△ACP与△BPQ全等.24.解:(1)OB=OC=4;(2)作DE⊥x轴于E,证△POB≌△DPE,得D(4+m,m);(3)过D作DF⊥y轴于F,则∠PBO=∠PDF,证CF=OC-OF=4+m=DF,∴△CDF是等腰Rt△,∠CDF=45°,∴∠PDC=∠CDF+∠PDF=45°+∠PBO.。

2020-2021学年山东省济南市长清一中高二下学期基础部6月周测(一)英语试题(Word版)

2020-2021学年山东省济南市长清一中高二下学期基础部6月周测(一)英语试题(Word版)

2010-2021 学年下学期高二基础部英语周测(2021.6.19)时间 120 分钟分值 150 分第一节(共5 小题;每小题1.5 分,满分7.5 分)听下面5 段对话。

每段对话后有一个小题,从题中所给的A、B、C 三个选项中选出最佳选项,并标在试卷的相应位置。

听完每段对话后,你都有10 秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1.What does the woman offer to do for the man?A.Look at his X-ray.B. Give him treatment.C. Send him to the hospital.2.How does the woman feel about the price?A.Expensive.B. Reasonable.C. Cheap.3.What is the woman going to do?A.Call Julian Assange.B.Watch the news on TV.C.Get information on the Internet.4.Why didn’t the man finish his science homework?A.He didn’t have enough time.B.He forgot it completely.C.He found it difficult.5.What does the job require?A.Business trips to Italian.B. Excellent Spanish.C. Native Germans.第二节(共15 小题;每小题1.5 分,满分22.5 分)听下面5 段对话或独白。

每段对话或独白后有几个小题,从题中所给的A、B、C 三个选项中选出最佳选项,并标在试卷的相应位置。

听每段对话或独白前,你将有时间阅读各个小题,每小题5 秒钟;听完后,各小题将给出5 秒钟的作答时间。

2024年5月高一周测卷一英语试题

2024年5月高一周测卷一英语试题

2024年5月高一英语周末练习卷一满分150分时量120分钟第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。

每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。

听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1.Where will the woman probably go first?A.To a shop.B.To a restaurant.C.To a post office.2.Why was the woman so late?A.Something went wrong with the bus.B.She took somebody to hospital.C.She didn’t catch the bus.3.What are the two speakers doing?A.Playing a ball game.B.Cheering for Oxford.C.Watching a football match.4.What did the man do last night?A.He went to a school.B.He talked with his friend.C.He saw a film on TV.5.What does the man think of the woman?A.She can make money.B.She doesn’t like money.C.She’s careless with money.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白,每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。

听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。

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(3)设地球质量为 M,地球半径为 r0,地球上物体的重力可视为万有引力,探测器上物体质量为 m0, 在地球表面重力为 G0,距土星中心 r0′=3.2×105 km 处的引力为 G0′,根据万有引力定律:
(2) 以地面为参照物,卫星再次出现在建筑物上方时,建筑物随地球转过的弧度比卫星转过弧
12、如图所示,宇航员站在某质量分布均匀的星球表面沿水平方向以初速度 v0 抛出一个小球, 经时间 t 落地,落地时速度与水平地面间的夹角为 α,已知该星球半径为 R,万有引力常量为 G, 求: (1)该星球表面的重力加速度 a;[来源:Z#xx#] (2)该星球的第一宇宙速度 v; (3)人造卫星绕该星球表面做匀速圆周运动的最小周期 T。
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10、假如作圆周运动的人造卫星的轨道半径增大到原来的 2 倍后仍作圆周运动,则 A.根据公式 v=ωr 可知,卫星运动的线速度将增大到原来的 2 倍
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13、土星周围有许多大小不等的岩石颗粒,其绕土星的运动可视为圆周运动.其中有两个岩石颗 粒 A 和 B 与土星中心的距离分别为 rA=8.0×104 km 和 rB=1.2×105 km 相互作用.(结果可用根式表示),求: (1)岩石颗粒 A 和 B 的线速度之比. (2)岩石颗粒 A 和 B 的周期之比. (3)土星探测器上有一物体,在地球上重为 10 N,推算出它在距土星中心 3.2×105 km 处受到土星 的引力为 0.38 N.已知地球半径为 6.4×103 km,请估算土星质量是地球质量的多少倍? ,忽略所有岩石颗粒间的
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B.在月球上发射一颗绕它运行的卫星的最小周期为 2
6、如图所示,从地面上 A 点发射一枚远程弹道导弹,在引力作用下沿 ACB 椭圆轨道飞行击中地 面目标 B,C 为轨道的远地点,距地面高度为 h.已知地球半径为 R,地球质量为 M,引力常量力 G。没距地面高度为 h 的圆轨道上卫星运动周期为 T0,下列结论中正确的是( ) C.在月球上发射一颗绕它运行的卫星的最小速度为

B.若 v2∝r,则该层是土星的卫星群 D.若 v2∝
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8、同步卫星离地心距离为 r,运行速率为 v1,加速度为 a1,地球赤道上物体随地球自转的向 心加速度为 a2,第一宇宙速度为 v2,地球半径为 R.则(
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5、已知地球的半径为 6.4× 106 m,地球自转的角速度为 7.29× 10 5rad/s,地面的重力加速度为 9.8 m/s2,在地球表面发射卫星的第一宇宙速度为 7.9× 103 m/s,第三宇宙速度为 16.7× 103 m/s,月 球到地球中心的距离为 3.84× 108 m。假设地球上有一棵苹果树长到了接近月球那么高,则当苹果 脱离苹果树后,将( A.落向地面 C.成为地球的“苹果月亮” ) B.成为地球的同步“苹果卫星” D.飞向茫茫宇宙
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(1)设土星质量为 M0,颗粒质量为 m,颗粒距土星中心距离为 r,线速度为 v,根据牛顿第
二定律和万有引力定律得
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9、据中央电视台报道,“嫦娥三号”探测器于 2013 年 12 月 2 日 1 时 30 分在西昌卫星发射中心 成功发射,预计于本月 14 日实现探测器着陆,随后完成嫦娥三号最重要的科学任务:观天、看地、 测月。如图 2 所示,“嫦娥三号”将携“玉兔号”月球车首次实现月球软着落。若已知月球质量为 M, 半径为 R,万有引力常量为 G0,以下畅想可能的是 ( A.月 球 表 面 的 重 力 加 速 度 )
3、2009 年 5 月,航天飞机在完成对哈勃空间望远镜的维修任务后,在 A 点从圆形轨道Ⅰ进入 椭圆轨道Ⅱ,B 为轨道Ⅱ上的一点,如图所示.关于航天飞机的运动,下列说法中正确的有( A. 在轨道Ⅱ上经过 A 的速度小于经过 B 的速度 B. 在轨道Ⅱ上经过 A 的速度小于在轨道Ⅰ上经过 A 的速度 C. 在轨道Ⅱ上运动的周期小于在轨道Ⅰ上运动的周期 D. 在轨道Ⅱ上经过 A 的加速度小于在轨道Ⅰ上经过 A 的加速度 4、已知某星球的平均密度是地球的 n 倍,半径是地球的 k 倍,地球 的第一宇宙速度为 v,则该星球的第一宇宙速度为 A. n v k B.k nv C.nk kv D. nkv
at tan v0
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(2)物体绕星球表面做匀速圆周运动时万有引力提供向心力,则有 又因为 G
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姓名:
A.导弹在 c 点的速度大于
高一物理周测
1、下述说法中正确的有( ) A.一天 24 h,太阳以地球为中心转动一周是公认的事实 B.由开普勒定律可知,各行星都分别在以太阳为圆心的各圆周上做匀速圆周运动 C.太阳系的八颗行星中,水星离太阳最近,由开普勒第三定律可知其运动周期最小 D.月球也是行星,它绕太阳一周需一个月的时间 2、两颗人造地球卫星,它们质量的比 m1:m2=1:2,它们运行的线速度的比是 v1:v2=1:2,那么 ( ) A.它们运行的周期比为 1:8 C.它们所受向心力的比为 1:32 B.它们运行的轨道半径之比为 4:1 D.它们运动的向心加速度的比为 1:16 )
t
2 2 2 1 0 2 1 g 0 0 T 3 3R
v tan 解得 a 0 t
G0
得:
Gm0 M r02
Gm0 M 0 G0 2 r0
M0 =95(倍) M
12 解析: (1)根据平抛运动知识
14、解析:因为双星受到同样大小的万有引力作用,且保持距离不变,绕同一圆心做匀速圆周 运动,所以具有周期、频率和角速度均相同;而轨道半径、线速度不同的特点。 (1)根据万有引力定律 F M1 2 R1 M 2 2 R2 及L R1 R2 可得: R1
T 2 πr v
得:
G
Mm 4 2 · 3R m (3R) 2 T2
G
Mm mg R2
(2)设颗粒绕土星做圆周运动的周期为 T, 对于 A、B 两颗粒分别有: TA
3R 联立解得 T 6 g
度少 2 .
2 * 3R v T
gR 3
2πrA 2πrB 和TB vA vB
2 2
aR
v0 Rtan t
(2)同理,还有 G
(3)人造卫星绕该星球表面做匀速圆周运动时,运行周期最小,则有
T
2πR v
所以 T 2πR
t v0 Rt a n
所以,周期为 T
4 2 L2 R1 GM 2
4 2 L2 R2 L 2L GM1 GM 1 M 2
GM Rh
B.导弹在 C 点的加速度等于 GM/(R+h)2 C.地球球心为导弹椭圆轨道的—个焦点 D.导弹从 A 点运动到 B 点的时间—定小于 T0 7、在土星外围存在一个模糊不清的圆环.以前,土星环通常被看作是土星上的一个或几个扁 平的固体物质盘.直到 1856 年,英国物理学家麦克斯韦从理论上论证了土星环是无数个小卫星在 土星赤道面上绕土星旋转的物质系统,为了判断它是土星的一部分还是土星的卫星群,可以根据 环中各层的线速度与该层到土星中心的距离之间的关系来判断( A.若 v∝r,则该层是土星的一部分 C.若 v∝ )
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解得 v
GM0 r
物理周测答案
1、C 2、BCD 3、ABC 4、B 5、D 6、BCD 7、AD 8、AD 9、C 10、CD 11 解:(1)对卫星运用万有引力定律和牛顿运动定律可得
, 对于 A、B两颗粒分别有 : v A
GM0 rA
和vB
GM0 rB
得:
vA 6 vB 2
1 m v2 B.根据公式 F 可知,卫星所需的向心力将减小到原来的 2 r
Gm1 m 2 1 C.根据公式 F 可知,地球提供的向心力将减小到原来的 2 4 r
D.根据上述 B 和 C 中给出的公式可知,卫星运动的线速度将减小到原来的
2 2
11、一颗在赤道上空飞行的人造地球卫星,其轨道半径为 r=3R(R 为地球半径),已知地球表面 重力加速度为 g,则: (1) 该卫星的运行周期是多大?运行速率多大? (2) 若卫星的运动方向与地球自转方向相同,已知地球自转角速度为 0 ,某一时刻该卫星通过 赤道上某建筑物的正上方,再经过多少时间它又一次出现在该建筑物正上方? 14、在天体运动中,将两颗彼此相距较近的行星称为双星。它们在相互的万有引力作用下间距 保持不变,并沿半径不同的同心圆轨道做匀速圆周运动。如果双星间距为 L,质量分别为 M1 和 M2,试计算: (1)双星的轨道半径; (2)双星的运行周期; (3)双星的线速度。
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