周练2
八年级数学上期周周练2 勾股定理及实数(含答案)-
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周周练二:勾股定理及实数班级 姓名 学号一、选择:1、下列说法正确的是( )A .无限小数都是无理数B .带根号的数都是无理数C .243.010 101 010…… 是有理数D .π是无理数, 故无理数也可能是有限小数2、下列各组数中,不能构成直角三角形的一组是( )A .1,2,5B .1,2,3C .3,4,5D .321,421,521. 3、下列条件:①三角形的一个外角与相邻内角相等 ②∠A =21∠B =31∠C ③ AC ∶BC ∶AB =1∶3∶2 ④ AC =n 2-1,BC =2n ,AB =n 2+1(n >1) 能判定 △ABC 是直角三角形的条件个数为( )A .1B .2C .3D .44、如图,在直角△ABC 中,∠ACB=90°,∠A=15°,CD ⊥AB 于D ,AC 边的垂直平分线交AB 于E ,那么AE ∶ED 等于( )A .1∶1B .1∶2C .3∶2D .2∶3 5、下列说法中不正确...的是( ) A .-1的立方根是-1。
B .0的平方根与立方根相等。
C .-4的平方根是2±。
D .每个数都有一个立方根。
二、填空:6、把下列各数填入相应的集合内:-7, 0.32, 31, 46, 0,8,21,3216-,2π-,311 ①有理数集合: { …};②无理数集合: { …};③正数集合: { …};④负数集合: { …}.7、81的平方根是________。
8、平方根等于本身的数是________。
9、如图(2),在高2米,坡角为30°的楼梯表面铺地毯,地毯的长至少需________米.10、已知x,y为实数,,09y6y4x22=+-++若axy-3x=y,则实数a的值是________。
三、解答题:11、如果某数的平方根是a+3和2a-15,求这个数。
12、八年级(3)班两位同学在打羽毛球, 一不小心球落在离地面高为2.3米的树上. 其中一位同学赶快搬来一架长为2.5米的梯子, 架在树干上, 梯子底端离树干1.5米远, 另一位同学爬上梯子去拿羽毛球. 问这位同学能拿到球吗? 如果再把梯子底端向树干靠近0.8米,问此时这位同学能拿到球吗?13、如图(4),小红用一张长方形纸片ABCD进行折纸,已知该纸片宽AB为8cm,长BC为10cm。
人教版英语七年级上册周周练—第二周
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第二周人教版英语七年级上册周周练考查范围:Starter Unit 2一、单项选择1.英文字母中, 有两个可以单独作单词, 它们分别是_____。
A.I; UB.I; AC.I; OD.A; E2.在四线格中, 占三格的小写字母是_____。
A.f; jB.i; j; fC.f; j; pD.q; p3.—Mary, who's the man over there?—He's my uncle(叔叔), _____ English teacher.A.theB.aC.anD./4.—Jill, who ________ that in the white coat?—It's my brother, Joe.A. didB. doesC. areD. is5.—What's this in English?—_____ a jacket.A.This'sB.It'sC.This is6.—What's that in English?—_____.A.It's whiteB.It's an penC.It's a greenD.It's a monkey7.—How do you _____ your name?—J-I-M, Jim.A.lookB.spellC.beD.say8.What's this _____ English?A.inB.atC.toD.for9.—_____ this in English?—_____ a CD player.A.What's; This isB.What's; It isC.What; It's10.—Spell it, please.—_____.A.It's a jacketB.Yes, J-A-C-K-E-TC.J-A-C-K-E-TD.Thank you二、阅读理解AAre you planning a birthday party for your son or daughter and can't decide what to do? People in different countries celebrate their birthday in different ways.Philip Evans, from Paris, smiles at us, "I'm going to be thirty years old next week, so I'm going to invite three very good friends out for dinner. In France, when it is your birthday, you often invite people out. In some countries, I know it's the opposite (相反) —the people take you out."Mr. and Mrs. Sato are from Tokyo. Mr. Sato is going to be sixty tomorrow. "In Japan, the sixtieth birthday called KanreKi-the beginning of a new life. The red color is for a new life, so we always give something red for a sixtieth birthday."Mrs. SatoLi Xiaomei from Beijing feels very excited and tells us, "Tomorrow is my sixteenth birthday. It's a special birthday, so we're going to have a family party. I'm probably going to get some money in lucky envelopes from my relatives (亲戚) . My mother is going to cook noodles. Noodles are for a long life. "11.In Paris, someone often ______ on his or her birthday.A.has a birthday partyB.has a picnic with friendsC.invites friends out for dinnerD.eats noodles12.In ______, people call the sixtieth birthday "KanreKi".A.ParisB.JapanC.ChinaD.Australia13.What does the underlined word "secret" mean in Chinese?A.阴谋B.闹剧C.猜想D.秘密14.Which of the following is not true?A.Philip is going to take his friends out for dinner on his birthdayB.Mrs.Sato will give her husband nothing.C.In China, the noodles stand for "a long life".D.Someone can receive some money on his or her birthday.15.What's the main idea of the passage?A.On their birthdays, people are very happy.B.The birthday presents are different for different ages.C.How to celebrate birthdays in different countries.D.People celebrate their birthdays in the same way.BIt’s nice to be invited to birthday parties, but sometimes you have to say no. How do you politely(礼貌地) refuse an invitation?Send it in.If you get a written(书面的) or an e-mail invitation to a party, refusing politely is easy. All you have to do is to give a polite answer.Ask for time to think.Refusing a face-to-face invitation can be difficult. The polite way is to ask for time to check your calendar. Then, you have time to find a polite answer. Just make sure that if you’ve been invited in person, you’d better refuse it in person. It’s polite.Be thankful.Even if you have to refuse the invitation, thank him or her for the invitation all the same. If your only reason is a conflicting(冲突的) event, tell the host that you will come if the dates are different.Be honest(诚实的).This may be the most important thing in politely refusing an invitation. You wouldn’t want people to lie(说谎) to you, so it’s correct etiquette(礼节) to give an honest reason. Just say it in a polite way.根据短文内容,判断下列句子正误。
周练答案(二)
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16.AC(A“姑娘们也为了显示她们“天然去雕饰”的美丽,露出一双赤脚”错误。
C赤脚上学体现的是生活的艰苦。
)17. (1)开头引用蔡其矫的诗:①内容上:开篇点题,表现了劳动人民朴素的自然美。
(2分)②结构上:引出了下文对一双双赤裸的双脚的回忆。
(1分)(2)结尾引用作者的诗:①内容上:将故乡农民所经历的困苦推及到整个民族所经历的困苦,有力地深化了主旨。
(2分)②结构上:照应开头,首尾呼应。
(1分)18.①用词准确。
“扣”“抓”“倒腾”“吸附”等动词,准确地表现了农民雨天劳作的艰辛。
②比喻形象。
“像铁锚一样紧紧地抓住泥土”,这一比喻形象地表现了农民劳作的尽力尽职,突出了他们勤劳、坚韧的性格特征③细节描写生动。
通过对父母雨后行走和负重前行时赤脚艰难移动的细致描绘,表现出他们赤脚劳作的艰辛。
(答对一点得2分,答对两点得满分。
如答其它特点,言之成理亦可。
)19.不矛盾(1分)。
“希望赤脚的人越来越少”,是希望民族强大、国家昌盛,物质贫困的人越来越少(2分)。
“不应该忘记曾经赤脚的日子”,是要铭记民族曾经的苦难历程和父辈们的艰辛生活,铭记我们民族勤劳、坚韧的伟大精神。
(2分)。
(适当结合文章内容,1分。
)断句:13. 史臣曰:仁义之于教/大矣/艺术之于用/博矣/徇于是者/不能无非/厚于利必有其害。
诗歌鉴赏:14.(1)“过”,动词,穿过(超过,盖过);(1分)这句写远处野寺的钟声穿过秋雨而来,仿佛带上了阵阵寒意。
(1分)点明了钟声寒的原因,化无形为有形,(1分)生动形象,具体地传达出了诗人所感受到的秋意。
(1分)(意思对即可,共4分)(2)尾句写归来时的景象,诗人选取西风、湖心月等意象,描绘了猎猎秋风一扫阴雨,令人清爽;明月新生,月华与水光交相辉映,营造了皎洁幽静(清爽开阔)的美妙境界(2分)表达了作者回家时的喜悦与兴奋(或表达了诗人为壮美的景象而惊奇、赞美之情)。
(2分)语言运用:20.细节描写使中国女子互相救助与段祺瑞蓄意杀害形成鲜明的对比,把执政府的卑劣与凶残揭示得多么深刻啊!20.(4分)祝贺您荣获2012年诺贝尔文学奖!(1分)先生30年扎根乡土,融现实于魔幻,构造独特的主观感觉世界,成为文学路上的“先锋”。
小学五年级语文周周练(二)
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小学五年级语文周周练(二)姓名:等第:开心一练一、修改病句。
1.我们攀登上险峻的高山和茂密的森林。
2.除夕之夜,皎洁的月光普照大地。
3.环境污染已成为当今世界性的三大社会问题。
4.我们从小就要培养讲究卫生。
5.他用两只有力的双手,紧紧地握住钢枪。
二、乱句重组。
()无论在早晨、黄昏、晴天或雨天,她都会呈现不同的面貌。
()日月潭不但环境美丽,而且景色宜人。
()黎明时,湖面的轻烟还没有散去,隐约看到天边的辰星和远山的几点灯光。
()日落的时候,她又像披上了一层薄薄的轻纱,周围的景物都那么朦胧,充满神秘感。
()在艳阳高照的天气里,整个日月潭都清晰的展现在眼前,使人们突然胸襟开朗起来。
三、我能按要求改写句子。
1.他跑得非常快。
(改成比喻句)2.晚霞映红了半边天。
(改成拟人句)四、我能活学活用。
1.古人云:“,。
”只要你肯多读书,写起作文来一定会得心应手。
(填诗句)2.俗话说:“。
”只要大家团结一心,就一定能战胜困难。
3.爸爸开了一家外贸公司,公司效益不错,我们家的经济状况也越来越好,这真是啊!(填歇后语)4.老师将要公布新一轮班委名单了,我心里紧张极了,真如(填歇后语)五、我会给带点字选择正确的意思。
⑴我想买一支钢笔.。
()⑵田老师的文笔.很好。
()⑶你知道这个字一共有几笔.吗?()A.书写、画图的工具B. 量词C. 笔法D. 组成汉字的笔画。
开心阅读五、阅读文段,我能行。
少年接着说:“……蝉□螳螂□黄雀□它们都一心想得到眼前的利益,却没顾到自己身后正隐伏着祸患呢□”听了少年这番话,吴王恍然大悟,他说:“你讲得太有道理了!”于是打消了攻打楚国的念头。
1、在文中□里给句子加上正确的标点。
2、少年所说的话可以概括成一个成语:_______________,_______________。
3、“螳螂”眼前的“利”指___________,身后的“祸”指____________________;吴王听了少年的话恍然大悟,“悟”出的是_________________________。
二年级小学数学上册周练(2)
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二年级小学数学周练(2)学校:___________姓名:___________班级:___________考号:___________一、填空题1.在图的空格里填数,使横行和竖行三个数相加的和均为90。
14152829292.48比29多();18比()少12;比36多15的数是()。
3.下图由()条线段围成,把下图分成三角形,最少能分成()个。
4.下图中一共有()个平行四边形。
5.红气球比黄气球少13个,绿气球比黄气球多15个,()的个数最多,()的个数最少,最多的比最少的多()个。
6.李师傅计划三天做100个零件,昨天做了38个,今天做了32个,两天共做了()个,还有()个没有做。
7.被减数是62,差是39,减数是();一个加数是28,另一个加数是27,和是()。
8.小华比小红少()个画片,小红送给小华()个后,两人的画片个数同样多。
9.芳芳有24枚邮票,明明有18枚邮票,芳芳送给明明()枚后,两人的邮票枚数同样多。
10.两位老师带领49名男生、28名女生参观建国70周年画展,一共要买()张门票。
11.跳绳比赛(单位:下)。
第一次第二次第三次总数笑笑262932()淘气25()2784奇思1730()76妙想()293375二、作图题12.画一条线把下面的长方形分成一个三角形和一个四边形。
13.在方格纸上画一个平行四边形和一个六边形。
14.根据要求分别在下列图形里画一条线段。
15.按要求画线段,并填一填。
三、解答题16.我们班栽杨树35棵,松树27棵,其中的28棵是男生栽的。
(1)全班一共栽树多少棵?(2)女生栽树多少棵?17.学校举行绘画比赛,二(1)班有32个同学参加,二(2)班比二(1)班少参加14人。
两个班一共有多少人参加?18.三(2)班图书角有36本故事书,科技书比故事书多15本。
科技书和故事书一共有多少本?19.小青有一些红、蓝花片,其中红花片比蓝花片少16枚,红花片有28枚。
第二单元《位置》周周练 (2)
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一上数学第一学期周周练2
班级姓名
1、
小朋友,我家在8号门的左边,请帮我找一找,应是()号门。
2、
(1)小狗跑在最()面,
小象跑在最()面。
(2)小象跑在小牛的()面,小狗跑在小兔的()面。
(3)小兔跑第(),它的后面有()个,前面有()个。
3、
上面是一群小动物在一起休息。
从左数起小马是第()位,从右数起小象是第()位。
小鹿的右边有()个,左边有()个,一共有()个小动物。
4、
(1)从左数香蕉排第(),它的左边是()。
(2)梨的左边有()种水果,葡萄在它的()边。
家长签名
(3)上面共有()种水果,从左数第一个是()。
5、你能写出他们的名字吗?
小明的左边是小军,右边是小青。
()()()6、
(1)小鸭在小猫的( )面。
猴在小鸡的( )面。
(2)羽毛球拍和羽毛球在皮球的( )面。
(3)小狗在第二层的最( )面。
(4)任选其中一个小动物或一个物品说说它的位置。
附加题
排队时,小华前面有4人,后面有3人,一共有( )人。
周练2
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高二化学第二次周练题一,选择题1.下列各组物质不属于...同分异构体的是()A.2,2-二甲基丙醇和2-甲基丁醇B.邻氯甲苯和对氯甲苯C.2-甲基丁烷和戊烷D.甲基丙烯酸和甲酸丙酯2.下列各化合物的命名中正确的是(D)3.有机化合物分子中能引进卤原子的反应是()A.消去反应B.酯化反应C.水解反应D.取代反应4.下面四种变化中,有一种变化与其他三种变化类型不同的是()A.CH3CH2OH + CH3COOHCH3COOCH2CH3 + H2OB.CH3CH2OH浓硫酸170℃CH2=CH2↑+H2OC.2CH3CH2OH浓硫酸140℃CH3CH2OCH2CH3 + H2OD. CH3CH2OH + HBr CH3CH2Br + H2O5. 已知乙烯醇(CH2=CHOH)不稳定,可自动转化为乙醛;二元醇可脱水生成环状化合物,现有1 mol乙二醇在一定条件下脱去1molH2O,所得产物的结构简式有下列几种,其中不可能的是()A.只有①B.只有①④C.只有①⑤D.①②③④⑤全部6.验证某有机物属于烃,应完成的实验内容属是()A.只测定它的C、H比B.只要证明它完全燃烧后产物只有H2O和CO2C.只测定其燃烧产物中H2O与CO2的物质的量的比值D.测定该试样的质量及试样完全燃烧后生成CO2和H2O的质量7.某有机物在氧气中充分燃烧,生成等物质的量的水和二氧化碳,则该有机物必须..满足的条件是( )A.分子中的C、H、O的个数比为1:2:3 B.分子中C、H个数比为1:2C.该有机物的相对分子质量为14 D.该分子中肯定不含氧元素8. 用铜作催化剂,使1-丙醇氧化为某有机物,下列物质中,与该有机物互为同分异构体的是A. CH3OCH2CH3B. CH3CH(OH)CH3C. CH3COCH3D. CH3COOCH39.下列说法错误..的是()A.乙醇和乙酸都是常用调味品的主要成分B.乙醇和乙酸的沸点和熔点都比C2H6、C2H4的沸点和熔点高C.乙醇和乙酸都能发生氧化反应D.乙醇和乙酸之间能发生酯化反应,酯化反应和皂化反应互为逆反应10、分子式为C5H10O3的有机物,在一定条件下能发生如下反应:①在浓硫酸存在下,能分别与CH3CH2OH或CH3COOH反应;②在特定温度及浓硫酸存在下,还能生成一种分式为C5H8O2的五元环状化合物。
部编版二年级上册语文第2周周练
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二年级语文第2周周练班级姓名学号一、看拼音,写词语。
(20分)bàn fǎ kuān guǎng yǎn jing zhīshi pí máo ()()()()()hǎi yáng yǐ jīng gōng zuò tóu dǐng bàng wǎn()()()()()二、给加点的字选择正确读音,并在下面打上“√”。
(18分)淹没.(mò méi) 成为.(wéi wèi) 非得.(děi dé) 教.书(jiāo jiào) 种.类(zhǒng zhòng) 没.有(méi mò) 因为.(wéi wèi) 教.室(jiāo jiào) 得.意(děi dé)三、选一选。
(17分)1.下列加点字的读音全部正确的是( ) (2分)A.捕.捉(pǔ) 欢迎.(yíng)B.坏.事(huài) 房屋.(ū)C.猜.测(cāi) 种植.(zhí)D.旅.行(lǚ) 指南针.(zēn)2.一只小鲤鱼在小河里( )着,他正要去姥姥家。
这时小鲤鱼看到前面有一只小螃蟹(xiè),连忙( )上去问路。
鲤鱼姥姥看见小鲤鱼朝着她游来,连忙笑眯眯地( )上去。
(3分)A.追B.游C.迎3.小蝌蚪的生长顺序是(4分)A.长出前腿B.长出后腿C.尾巴不见D.尾巴变短4.大自然的秘密:蒲公英靠( )传播种子,石榴靠( )传播种子,苍耳靠( )传播种子,豌豆靠( )传播种子。
(4分)A.被小鸟吃掉B.风吹C.自身D.挂住动物的皮毛5.美美要去野外观察大自然,下列物品最适合带上的是( )(2分)A.口香糖帽子水壶B.登山鞋帐篷玩具C.照相机手机裙子D.指南针地图水壶6.下列说法有误的是( ) (2分)A.《小蝌蚪找妈妈》一文中,小蝌蚪的妈妈是青蛙。
五年级数学(上)周周练2
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五年级数学(上)周周练(2)姓名:成绩:书写:课堂巩固一、填空1. -2和-5之间的负数有:()、()、()……,一共有()个。
2.小力和小军()(填:同向/相向)而行。
小力行30米记作+30米,小军行25米记作-25米。
3.一个平行四边形沿高剪开拼成一个长方形,周长(),面积();将四根木条钉成一个平行四边形,把它拉成一个长方形,周长(),面积()。
(填:变大,变小或不变)4. 一个平行四边形的底和高同时扩大为原来的3倍,面积会扩大为原来的()倍。
5. 一个三角形的面积是9平方分米,底是3分米,高是()分米。
6. 一个三角形的面积与平行四边形的面积相等,底也相等,如果三角形的高是12厘米,那么平行四边形的高是()厘米。
7.如图,平行四边形的面积是108平方厘米,阴影部分的面积是()8. 2700平方厘米=()平方分米 14平方米=()平方分米()平方米=2000平方分米1400平方分米=()平方厘米二、计算1.利用合适的方法计算25 ×12÷2 108×18÷9 960×25 ÷322.计算下面图形的面积(1)底=25cm,高=3dm的平行四边形。
(2)底=64dm,高=25dm的三角形。
三、解决问题1.一块三角形地,底长36米,高是25米,如果每平方米收小麦700克,这块地可以收小麦多少千克?2.一个平行四边形果园,底长150米,高40米,如果每棵果树平均占地6平方米,这个果园可以种多少棵果树?3.操作在下图中画出1个底边是4厘米,面积是12平方厘米的平行四边形1个;1个高是4厘米,面积是12平方厘米的三角形1个。
(下面方格纸每格为1 c㎡)错题再现1. 一个直角三角形,三条边分别是3分米、4分米和5分米,这个三角形的面积是()平方分米。
2. 如右图,平行四边形一条底上的高是5厘米,它的面积是多少平方厘米?拓展应用1.如图,在一个梯形中剪去一个三角形,剩下部分(阴影部分)的面积是多少平方厘米?2. 如图,一个三角形的底边长6米,如果底边延长2米,那么面积就增加5平方米.原来三角形的面积是多少平方米?。
八上数学周练二
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初二年级数学第二次周练(卷面总分:120分;考试时间:100分钟)一.选择题(每题3分,共24分)1.哪一面镜子里是他的像(▲)2. 如图所示的长方形纸片,先沿虚线按箭头方向向右对折,接着将对折后的纸片沿虚线剪下一个小圆和一个小三角形,然后将纸片打开是下列图中的哪一个(▲)A. B. C. D.3. 如图,已知点A、D、C、F在同一条直线上,AB=DE,BC=EF,要使△ABC≌△DEF,还需要添加一个条件是(▲)A.∠BCA=∠F B.∠B=∠E C.BC∥EF D.∠A=∠EDF第3题第4题第5题第6题4.如图:DE是△ABC中AC边的垂直平分线,若BC=8厘米,AB=10厘米,则△EBC的周长为(▲)厘米.A.16 B.18 C.26D.285.如图,∠3=30°,为了使白球反弹后能将黑球直接撞入袋中,那么击打白球时,必须保证∠1的度数为(▲) A.30°B.45°C.60° D.75°6. 如图,已知∠AOB=40°,OM平分∠AOB,MA⊥OA于A,MB⊥OB于B,则∠MAB的度数为(▲) A. 50° B. 40° C. 30° D. 20°7.如图,直线L是一条河,P、Q是两村庄.欲在L上的某处修建一水泵站,向P,Q两地供水,现有如下四种铺设方案,图中实线表示铺设的管道,则所需管道最短的是(▲)A .B .C .D .8. 把一个图形先沿着一条直线进行轴对称变换,再沿着与这条直线平行的方向平移,我们把这样的图形变换叫做滑动对称变换.在自然界和日常生活中,大量地存在这种图形变换(如图1).结合轴对称变换和平移变换的有关性质,你认为在滑动对称变换过程中,两个对应三角形(如图2)的对应点所具有的性质是( ▲ ).A .对应点连线与对称轴垂直B .对应点连线被对称轴平分C .对应点连线被对称轴垂直平分D .对应点连线互相平行二.填空题(每题3分,共30分)9.如图所示的两个三角形关于某条直线对称,∠1=110°,∠2=46°,则x = ▲ °.10.已知OC 是∠AOB 的平分线,点P 在OC 上,PD ⊥OA ,PE ⊥OB ,垂足分别为点D 、E ,PD=10,则PE 的长度为 ▲ .第9题 第12题 第13题 第14题 11.已知点P 在线段AB 的垂直平分线上,PA=6,则PB= ▲ .12. 如图,AD ∥BC ,AD=AB ,∠A=110°,则∠DBC= ▲ °.13.如图, 35O ∠=︒,CD 为OA 的垂直平分线,则ACB ∠的度数为 ▲ °.14.如图,在△ABC 中,AB=AC ,AD 是BC 边上的高,点E 、F 是AD 的三等分点,若△ABC 的面积为12cm 2,则图中阴影部分的面积为 ▲ cm 2.15.如图是4×4的正方形网格,再把其中一个白色小正方形涂上阴影,使整个阴影部分成为轴对称图形,这样的白色小正方形有 ▲ 个.第15题 第16题 第17题 第18题16.如图,l∥m,等边△ABC 的顶点A 在直线m 上,则∠α= ▲ . 1x 2O D C BA A D C B17.如图,在Rt△ABC中,∠ACB=90°,BC=2cm,CD⊥AB,在AC上取一点E,使EC=BC,过点E作EF⊥AC交CD的延长线于点F,若EF=5cm,则AE= ▲ cm.18.如图,已知△ABC的周长是21,OB,OC分别平分∠ABC和∠ACB,OD⊥BC于D,且OD=4,△ABC的面积是 .三.解答题(共66分)19.(6分)在3×3的正方形网格中,有一个以格点为顶点的三角形(阴影部分)如图所示,请你在图①,图②,图③中,分别画出一个与该三角形成轴对称且以格点为顶点的三角形,并将所画三角形涂上阴影.(注:所画的三个图不能重复.)20.(8分)在△AB C中,AB的垂直平分线DF交BC于点D,AC的垂直平分线EG交BC于点E,BC=30cm,求△A DE的周长.21.(10分)如图,△ABC和△ECD都是等腰直角三角形,∠AC B=∠DCE=90°,D为AB边上一点.求证:BD=AE.22.(10分)如图所示,AB=AC,BD=CD,DE⊥AB于点E,DF⊥AC于点F,求证:DE=DF.23.(10分)如图,AB∥CD,以点A 为圆心,小于AC 长为半径作圆弧,分别交AB ,AC 于E ,F 两点,再分别以E ,F 为圆心,大于21EF 长为半径作圆弧,两条圆弧交于点P ,作射线AP ,交CD 于点M 。
2023九年级语文抒情性文体阅读周周练Ⅱ
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2023九年级语文抒情性文体阅读周周练Ⅱ(一)阅读下面的文章,完成问题。
(15分)求证孙春平①退休后,我和老伴儿一起去了外地女儿家,帮助带小外孙。
家中的杂事都好安排,最让人惦记的是汇款单,超过两个月未领取就会退回。
后来,我就把邮件的事拜托给了邮递员,一般情况下,请她特别注意汇款单的日期,及时告知,或转寄给我就是了。
我没为这事操过心。
②三年前的那个清晨,我下了火车,刚进小区大门,就见到了站在我家楼门前的汪师傅,她穿着深绿色的邮递员工作服,怀抱着捆扎得结结实实的一摞邮件。
我快步赶过去,跟她打招呼:“汪师傅,大冷的天,你不必嘛。
”新年刚过,数九寒天,那是一年中最冷的时段。
汪师傅说:“你微信发了车次,我是看了时间来的,没等几分钟。
”③我客气道:“那就进家喝杯热茶吧。
”④“不必了。
只是……我有个……很冒昧也很唐突的请求,不知楚老师能否支持一下。
”⑤“你说。
”⑥“你的邮件里有张三万多元的汇款单,我想跟楚老师借用一段时间,两万就行。
”⑦这确实是有点儿冒昧和唐突了,怪不得冻掉下巴的冬晨,她候在了家门前呢。
在我沉吟发怔的一瞬间,她扯下了口罩和红色围脖,同时把掌心里的证件亮给我:“我叫汪云,这是我的身份证,我怀里还带着房产证。
我母亲正住院,手术前要求交足费用。
我也是没有别的办法了,才想起请楚老师帮忙。
等手术后,医保单位完成必要的审核,我立刻把欠款如数奉还。
利息不低于银行定期,您看行吗?”⑧看来是真遭遇难心事了!汪云说得很快,也很急,但语句顺畅,严谨有度,想来是早准备腹稿了。
再看她的脸色,灰暗,甚至有些发青。
⑨我心里已有了决定,便故作轻松地说:“可汇款单毕竟不是人民币,我什么时候把钱交给你呢?”⑩“就今天吧,上午十点,我在诚信路街角那家邮政储蓄银行营业所等你。
”⑪上午十点,我带着身份证准时到了营业所,把两扎现金放到汪云的手上时,还说:“你要不要多备上一点儿?我不急用钱。
”汪云向我鞠躬致谢,说:“我手上还有些存款,这就非常感谢了。
八年级数学周练(2)
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八年级数学周练(2)八年级数学周练(2)一,填空题(每题4分,共24分)1. 如图,△ABC是不等边三角形,DE=BC,以D ,E为两个顶点作位置不同的三角形,使所作的三角形与△ABC全等,这样的三角形最多可以画出_____个. A BCDE2.如图2,△ABC中,∠C=90°,AD平分∠BAC,AB=5,CD=2,则△ABD的面积是______.3、设A、B两点关于直线MN对称,则______垂直平分________。
4、成轴对称的汉字可以写一些词汇,如“苹果”,请你也写两个:_____。
5、如图3,AB=AC,∠A=40°,AB的垂直平分线MN交AC于点D,则∠DBC=_______。
B DCDE A图2 CAB6.在数学活动课上,小明提出这样一个问题:∠B=∠C=90°,E是BC的中点,DE平分∠ADC,∠CED=35°,如图,则∠EAB是多少度?大家一起热烈地讨论交流,小英第一个得出正确答案,是______. A 二,选择题(每题4分,共24分)1. 下列命题中正确的是()B D E CA.全等三角形的高相等 B.全等三角形的中线相等C.全等三角形的角平分线相等 D.全等三角形对应角的平分线相等2.如图,AD?AE,BD=CE,∠ ADB=∠AEC??=100?,∠ BAE??=70?,下列结论错误的是()A.△ABE≌△ACD B.△ABD≌△ACE C.∠DAE=40° D.∠C=30°3.已知:如图,在△ABC中,AB=AC,D是BC的中点,DE⊥AB于E,DF⊥AC于F,则图中共有全等三角形()AA.5对 B.4对 C.3对 D.2对E G FB C4、如图,四个图形中,是轴对称图形的有()DA.4个 B.3个 C.2个 D.1个5、如图5,图中有且只有三条对称轴的是( )6.如图6,已知矩形ABCD沿着AE折叠,使D点落在BC边上的F处,如果∠BAF=60°,则∠DAE=( )A.15°B.30°C.45°D.60°三,证明题1. 如图,已知: AD是BC上的中线 ,且DF=DE.求证:BE∥CF.(8分)5、如图10,牧童在A处放牛,其家在B处,A、B到河岸的距离分别为AC、BD.问牧童从A处放2.如图∠C=∠D=90°,BE平分∠ABC,且点E为DC的中点.求证:AE平分∠BAD (8分) 3.如图,公园有一条“Z”字形道路ABCD,其中AB∥CD,在E,M,F处各有一个小石凳,且BE?CF,M为BC的中点,请问三个小石凳是否在一条直线上?说出你推断的理由.(9分)BEA MDFC4.如图,给出五个等量关系:①AD?BC ②AC?BD ③CE?DE ④?D??C ⑤?DAB??CBA.请你以其中两个为条件,另三个中的一个为结论,推出一个正确的结论(只需写出一种情况),并加以证明.(8分)已知: D C 求证: E 证明: A B牛牵到河边饮水后再回家,试问在何处饮水,所走路程最短?(作图表示)(9分)6、如图11,斜折一页书的一角,使点A落在同一页书内的A'处,DE为折痕,作DF 平分∠A'DB,试猜想∠FDE等于多少度,并说明理由。
周练二试题答案
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周练二(时间:90分钟 满分:120分)一、选择题:1.(2011年高考北京卷)已知集合P ={x |x 2≤1},M ={a }.若P ∪M =P ,则a 的取值范 围是( )A .(-∞,-1]B .[1,+∞)C .[-1,1]D .(-∞,-1]∪[1,+∞)解析:选C.由P ={x |x 2≤1}得P ={x |-1≤x ≤1}.由P ∪M =P 得M ⊆P .又M ={a },∴-1≤a ≤1.2.下例哪组函数相同?( D )A .x x f =)(与2)()(x x f = B. 1)3)(1()(-+-=x x x x f 与3)(+=x x fC. x x f =)(与2)(x x f =D.1)(2+=x x f 与1)(2+=t t f3.函数6525)(2+--=x x xx f 的定义域为( C ) A .]25,(-∞ B. ]2,(-∞ C. ]25,2()2,(⋃-∞ D. ]25,2()2,(⋂-∞ 4.在下列图象中,函数)(x f y =的图象可能是( )A B C D【答案】C5.已知)(x f 的定义域为)2,1[-,则)1(-x f 定义域为( B )A .)2,1[- B. )3,0[ C. )2,0[ D. )1,2[-6.设x,y 是两个实数,命题:“x,y 中至少有一个数大于1”成立的充分不必要条件是( )A .2x y +=B .2x y +>C .222x y +>D .1xy >【答案】B7.投掷一颗骰子的点数为ξ,则( )yyyxx x xyA.25.3,5.3==ξξD EB.1235,5.3==ξξD E C.5.3,5.3==ξξD E D.1635,5.3==ξξD E8.已知x x g 21)(-=,221)]([xx x g f -=,则=)21(f (C ) A .1 B.3 C.15 D.309.定义集合A 、B 的运算A *B ={x |x ∈A ,或x ∈B ,且x ∉A ∩B },则(A *B )*A 等于( )A .A ∩B B .A ∪BC .AD .B[答案] D[解析] A *B 的本质就是集合A 与B 的并集中除去它们的公共元素后,剩余元素组成的集合.因此(A *B )*A 是图中阴影部分与A 的并集,除去A 中阴影部分后剩余部分即B ,故选D.[点评] 可取特殊集合求解.如取A ={1,2,3},B ={1,5},则A *B ={2,3,5},(A *B )*A ={1,5}=B .10.已知f (x )=3-2|x |,g (x )=x 2-2x ,F (x )=⎩⎪⎨⎪⎧g (x ),若f (x )≥g (x ),f (x ),若f (x )<g (x ).则F (x )的最值是( )A .最大值为3,最小值-1B .最大值为7-27,无最小值C .最大值为3,无最小值D .既无最大值,又无最小值 [答案] B[解析] 作出F (x )的图象,如图实线部分,知有最大值而无最小值,且最大值不是3,故选B.二、填空题11.同时抛掷三枚硬币100次,设三枚都出现正面的次数为ξ,则=)(ξD1617512、812⎪⎪⎭⎫ ⎝⎛-x x 的展开式中二项式系数最大的项为 11202x 。
周练二
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七年级数学周周练(二)一.精心选一选(每小题3分,共30分)1. -3的倒数是 ( )A 、-3B 、3C 、31D 、-31 2. 计算2-3的结果为( )A.-1B.1C.-5D.53. 数轴上原点以及原点右边的点所表示的数是 ( ) A 、负数 B 、非负数C 、正数D 、非正数4. 绝对值不大于4的所有负整数的和为( ) A 、0 B 、10 C 、-10 D 、-45. 下列说法正确的是 ( )⑴0是绝对值最小的有理数; ⑵相反数大于本身的数是负数; ⑶数轴上原点两侧的数互为相反数; ⑷两个数比较,绝对值大的反而小A 、⑴⑵ B、⑴⑶ C、⑴⑵⑶ D、⑴⑵⑶⑷ 6. 下列计算错误的是( )A. 0 -(-5)=5B. (-3)-(-5)=2C.234932-=⎪⎭⎫ ⎝⎛-⨯ D. (-36)÷(-9)=-4 7.已知下列各数:-8,2.1,19,3,0,-2.5,10,-1,其中负数有( )个. A 、2; B 、3; C 、4; D 、5.8. 实数a 、b 在数轴上的对应点如图所示,则下列关系式中错误..的是 ( ) A 、0ab > B 、0a b +< C 、1b< D 、0a b -< 9. 已知两个有理数a,b ,如果ab <0,且a+b <0,那么( )A 、a >0,b >0B 、a <0,b >0C 、a,b 异号D 、a,b 异a b 010. 下列图形都是由同样大小的棋子按一定的规律组成,其中第①个图形有1棵棋子,第②个图形一共有6棵棋子,第③个图形一共有16棵棋子,…,则第⑥个图形中棋子的颗数为( )二、耐心填一填(每小题3分,共30分)11.比较大小: 2 -3.(用“>”或“<”或“=”填空) 12. 计算:|-1-2|= .13.面粉厂运进200吨面粉记作+200,那么运出328吨面粉记作___ . 14.把下列各数填在相应的集合里: +5, -21, -20, 0, 0.74, -151, +3, -9.8, 241, 251整数集合: { ⋯}; 负分数集合:{ ⋯ }15.某种药品的说明书上标明保存温度是(20±2)℃,由此可知在 ℃至 ℃范围内保存才合适。
七年级语文上册周周练2
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(2)这些素养在人际交往中起什么作用?(4分)
文明用语能使交往和谐,为人际关系增色。态度亲和能使我们增添 交往的魅力,拉近彼此之间的距离。举止端庄能反映我们高雅的气质, 反映我们的道德素养和文明程度。
遮bì( 蔽 )
3.补全下列短语。(3分)
翻来( 覆 )去 喜出( 望 )外 絮絮( 叨叨 ) 各得其( 所 ) 水波( 粼粼 ) 面面相( 觑 )Βιβλιοθήκη 4.文学常识填空。(12分)
(1)《秋天的怀念》选自《_史__铁__生__散__文__选__》,作者_史__铁__生__, 小 说代表作《我__的__遥__远__的__清__平__湾__》《_命__若__琴__弦__》,散文代表作 《_我__与__地__坛__》《__合__欢__树___》。
(2)《金色花》是__印__度__(国别)作家_泰__戈__尔_写的,他的主要诗集有 《____新__月__集____》《园丁集》《____飞__鸟__集____》《吉檀迦利》。
(3)冰心,原名___谢__婉__莹_,现当代作家,___诗__人___。著有诗集《繁 星》《___春__水___》。散文集《樱花赞》《寄___小__读__者_》。
我感动。我将把这一切视为最可贵的馈赠、最宝贵的 财富。
3.甲、乙两幅漫画都叫“朋友”,仔细欣赏,然后任选其中一幅, 说说画家想告诉我们什么。(4分)
我选择的是漫画_____,这幅漫画形象地告诉我们:___________。
我选择的是漫画甲。这幅漫画形象地告诉我们:朋友应当将心比心, 以诚相待。
我选择的是漫画乙。这幅漫画形象地告诉我们:朋友应当以礼相待, 互相支持,亲密无间。
(2)请写出与友情有关的古诗词。(至少两句)(2分) ①桃花潭水深千尺,不及汪伦送我情。 ②海内存知己,天涯若比邻。 ③劝君更尽一杯酒,西出阳关无故人。
初一上周练2
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初一(上)数学周练2班级______姓名__________号数________成绩______一、选择题1.某天的温度上升了02-C 的意义是…………………………( )A.上升了02CB. 下降了02CC.下降了02- CD. 没有变化.2.下列各数中,互为相反数的是………………………( )A.3-和3B.215-和112C.75.0和34- D.1-和1- 3.A 为数轴上表示–1的点,将点A 沿数轴向右平移4个单位长度后到点B ,则点B 所表示的数为………………………………………( )A .–5B .0C .2D .34.下列说法中正确的是……………………………………( )①互为相反数的两个数绝对值相等;②正数和零的绝对值都等于它本身;③只有负数的绝对值是它的相反数;④一个数的绝对值的相反数一定是负数.A .1个B .2个C .3个D .4个5.在数轴上与-3的距离等于4的点表示的数是…………( )A .1B .-7C .1或-7D .无数个6.大于-4的非正整数的个数是………………………… ( )A .无数个B . 2个C .3个D .4个7.下列化简错误的是………………………………………( )A .-[-(-8)] = -8B .+[-(+12)] = -12 C .-|-(+13)| =13 D .|-(-4)| = 48.若“!”是一种数学运算符号,并且1!=1,2!=2×1=2,3!=3×2×1=6,4!=4×3 ×2×1=24,…,则100!98!的值是……………………( ) A .5049B .99!C .9900D .2! 二、填空题9. -3.2的相反数是____________,绝对值是______________10.若把长江的水位比警戒水位低0.8m 记作-0.8m ,则+1.1m 表示的意思是 _________________11.数轴上表示点A 和点B 的两数互为相反数,且A 和B 之间相距5个单位长度,则这两个点所表示的数为 ____和 _____12.比较下列各组数的大小:(1)一67 一56; (2) 3-- 0 13.数轴上,到原点的距离为2个单位长度的点所表示的数是 _____14.倒数和绝对值都等于它本身的数是__________.15. 若a 、b 互为倒数,m 、n 互为相反数,则()ab n m +-+1= .16.若|x | = |–3|,则x = .17. 已知a >0,b <0,且 > ,则 a ,-a ,b ,-b 的大小关系为 _______________________________________(用“<”号连接起来)三、解答题18.把下列各数分别填人相应的集合里.—5, 34-, 0, —3.14, 227, —12, +1.99, —(—6) (1)正数集合:{ …}(2)负数集合:{ …}(3)整数集合:{ …}(4)分数集合:{ …}19.在数轴上表示下列各数,并把它们按照从小到大的顺序排列.2, 一l , 一1.5, 0, 3-, 13220. 比较下列各组数的大小:(1) 431-与541-; (2) -113与-0.273;(3) |-725|与50% ; (4) -(-932)与-|-821|21. 计算:(1) (+20)+(+12); (2) (+2)+(-11);(3) (-3.6)+2.8+(-0.1)+0.8+(+0.1);;(4) (-83)+(+26)+(-41)+(+15).22. 出租车司机小李某天下午营运,全是在东西走向的干将路上行驶,如果规定向东为正向,向西为负,他这天下午行车里程(单位:千米)如下: +6,-2,+4,-1,+7,-3,-2,+3,+4,-7,+6.(1) 将最后一名乘客送到目的地时,小李距下午出车时的出发点多远?(2) 若汽油耗油量为0.65升/千米,这天下午小李共耗油多少升?附加题:(选做)1. 结合数轴与绝对值的知识回答下列问题:(1)数轴上表示4和1的两点之间的距离是 ;表示-3和2两点之间的距离是 ;一般地,数轴上表示数m 和数n 的两点之间的距离等于n m -.如果表示数a 和-2的两点之间的距离是3,那么a = ;(2)若数轴上表示数a 的点位于-4与2之间,求4+a +2-a 的值;(3) 由以上探索猜想,对于任何有理数a ,1-a +4-a 是否有最小值?如果有,写出最小值;如果没有,说明理由.(4)当a 取何值时,5+a +1-a +4-a 的值最小,最小值是多少?请说明理由.2. 先阅读第(1)小题,再计算第(2)小题:(1)计算:)213(4324)325(651-++-+- 解:原式= )213()4324()325()651(--+++--+-- =2134324325651--++---- =)21()3(4324)32()5()65()1(-+-+++-+-+-+- =[]⎥⎦⎤⎢⎣⎡-++-+-+-++-+-)21(43)32()65()3(24)5()1( =515()4+- =3134(2)计算)211()322004(434000)2005(-+-++- 0-5-4-221-334-1。
小学一年级上册语文周周练 (2)
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小学语文周周练一、拼音填空秋q 树sh 片p 飞f会h 气ì叶y 个è二、填一填1、“可”字的笔顺是,共画,第五笔是。
2、“东”字共画,第二笔是,可以组词为。
3、“西”字的笔顺是,第五笔是,这个笔画读作(①shùzhé②shùwān)。
4.“人”字共画,第一笔是,加一笔变成,组词为。
三.看拼音,写字词1.田田的个zi()长高le()。
2.小朋友要听dàrén()的话。
四.连一连sān diǎn shuǐ艹河、江与水有关cǎo zìtóu 氵莲、花与植物有关五、补全古诗,完成练习江南()采莲,莲叶何()()。
鱼戏莲叶间。
鱼戏莲叶(),鱼戏莲叶(),鱼戏莲叶南,鱼戏莲叶北。
1.读完这首诗,我的眼前浮现出一幅()的画面。
①人们捉鱼②鱼儿围绕荷叶四处游动六.阅读书写秋qiū天tiān天tiān气qì凉liánɡ了le,树shù叶yè黄huánɡ了le,一yí片piàn片piàn叶yè子zǐ从cónɡ树shù上shànɡ落luò下xià来lái。
天tiān空kōnɡ那nà么me蓝lán,那nà么me高ɡāo,一yì群qún大dà雁yàn往wǎnɡ南nán飞fēi,一yī会huìr儿ér排pái成chénɡ个ɡè“人rén”字zì,一yī会huìr儿ér排pái成chénɡ个ɡè“一yì”字zì。
啊a !秋qi ū天ti ān 来l ái 了le!1.照样子,写词语。
万州实验中学高三物理周周练试卷(2)
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万州实验中学高三物理周周练(2)第一部分(选择题 共48分)一、本题共10小题;每小题6分,共48分. 在每小题给出的四个选项中,有的小题只有一个选项正确,有的小题有多个选项正确,全部选对的得6分,选不全的得2分,有选错或不答的得0分.1.半径相等的两个小球甲和乙,在光滑水平面上沿同一直线相向运动,若甲球的质量大于乙球的质量,碰撞前两球的动能相等,则碰撞后两球的运动状态可能是 A 、甲球的速度为零而乙球的速度不为零 B 、乙球的速度为零而甲球的速度不为零 C 、两球的速度均不为零D 、两球的速度方向均与原方向相反,两球的动能仍相等2.一粒钢珠从静止状态开始自由下落,然后陷入泥潭中。
若把在空中下落的过程称为过程Ⅰ,进入泥潭直到停住的过程称为过程Ⅱ,则A 、过程Ⅰ中钢珠动量的改变量等于重力的冲量。
B 、过程Ⅱ中阻力的冲量的大小等于过程Ⅰ中重力冲量的大小。
C 、过程Ⅱ中钢珠克服阻力所做的功等于过程Ⅰ与过程Ⅱ中钢珠所减少的重力势能之和。
D 、过程Ⅱ中损失的机械能等于过程Ⅰ中钢珠所增加的动能。
3.光滑水平面上停着一质量为M 的木块,质量为m 、速度为V 0的子弹沿水平方向射入木块,并深入木块距离为b ,两者最后有共同速度V ,已知这一过程中木块前进了距离a ,木块对子弹的平均阻力为f 。
则下列各式中不正确的是: A 、mV 0=(M+m)V B 、2202121)(mV mV b a f -=+ C 、220)(2121V m M mV +> D 、221MV b f =⋅ 4.矩形滑块由不同材料的上下两层固体粘接而成,将其放在光滑的水平面上,一颗子弹以水平速度射向滑块。
射中上层子弹刚好不穿出;射中下层子弹刚好能嵌入,则:A 、两次子弹对滑块做的功一样多;B 、两次滑块所受的冲量一样大;C 、子弹嵌入下层时,对滑块做功多;D 、子弹嵌入上层时,滑块所受冲量大。
5.如图所示,小球以初速v 0从A 点沿不光滑的轨道运动到高为h 的B 点后自动返回,其返回途中仍经过A 点,则经过A 点的速度大小为 ( ) A .gh v 420- B .204v gh -C .gh v 220-D .202v gh -6.如图所示,物块P 、Q 的质量分别为m 1和m 2 ( m 1 ≠ m 2 ), 它们由一轻质弹簧连接,静止于光滑水平面上,现用外力分别作用在两物块上,使弹簧被压缩,然后由静止释放,若在弹簧恢复到原长时P 的速度为V ,则:A 、释放前,弹簧的弹性势能为221)(21v m m +;B 、释放前,弹簧的弹性势能为22211)(21v m m m m -; C 、弹簧恢复到原长时Q 的速度为v m m m 211--;D 、弹簧恢复到原长时Q 的速度为v m m 21-。
五年级周周练2
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1.列竖式计算下面各题,按要求用“四舍五入”法保留积的小数位数。
(1)得数保留一位小数。
3.5×0.97 2.8×3.9 27.3×1.29(2)得数保留两位小数。
2.08×0.65 0.87×3.15 57.8×0.03(3)得数保留整数(4)得数保留三位小数1.07×5.8 0.65×0.472、用简便方法计算。
10.4×2.8+7.2×10.4 0.83×99 4.5×3.6+55×0.36 0.4×7.8×2.515×0.4×25 27×3.7+3.7×73 0.125×8.8 8.4×101.3-8.4×1.3(1)6.9628保留整数是();保留到十分位是();保留两位小数是();保留三位小数是()。
(2)—个三位小数,“四舍五人”后,近似数是3.0,这个数最大是(),最小是()。
三、解答题。
1、小兰家每天平均用电2.3千瓦时,八月份她家共用电多少千瓦时?如果每千瓦时0.79元,她家八月份一共应缴纳电费多少元?(得数保留一位小数。
)2、邻居张阿姨从香港出差回来,送给红红一个文具盒,这个文具盒的价钱足8.9港元。
当时的汇率如图所示。
当时这个文具盒的价钱折合人民币大约多少元?(得数保留两位小数)3.李梅家购买了一套住房(平面图如下),现在要进行简单装修。
请你帮助她解决下面的问题。
(1)厨房和卫生间的面积之和是多少平方米?(2)哪个房间的面积仅次于客厅的面积?这个房间的面积是多少平方米?(3)如果客厅铺方砖,每平方米需要4块,买82块够用吗?(不计损耗,墙体厚度忽略不计)。
Starter+Unit+2+周练(2)+2024-2025学年人教版(2024)七年级英语上册++
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周周练2(预备二单元)一.根据中文写英文(1*35)动词:v.坐下__________ 遇见__________ 允许,让___________ 走,去____________能__________ 说__________ 保持___________ 放____________ 找到__________ 看见__________ 等待___________ be动词____________ 名词:n.人们__________ 早晨__________ 班级__________ 名字___________时间__________ 书包__________ 尺子__________ 裤子___________ 鞋子__________ 书桌__________ 椅子__________ 书___________盒子__________ 房间__________ 分钟__________ 头___________形容词:adj.好的__________ 健康的_________ 美妙的__________ 整洁的__________介词:prep.在....上________ 在.....下________ 在.....里__________二.根据英文写出中文以及词性(1*13)unit _________ greet __________ each other __________ start__________ everyone________ conversation _________ spell__________ bell__________ bottle________ eraser________ key ________ thing__________ need__________三.翻译下列句子(2*10)1. How do you start a conversation?2.How do you spell your name?3. It's time for class.4.I have a bottle.5. It's brown.6.你的书包里有什么?7.帽子是什么颜色的?8.我找不到我的新帽子了。
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江苏省沭阳中学高三英语课堂练习(二)第一部分:英语知识运用(共两节,满分35分)第一节:单项填空(共15小题;每小题1分,共15分)1. “Mary, don’t take it ________ when your teacher makes some general and unpopular remarks in class. Just try your best.” said her mother.A. typicallyB. exactlyC. actuallyD. personally2. Australia is a sporting nation, ________ you can feel their absolute love for sport.A. the one thatB. one whereC. the one whereD. it where3. I can hardly remember any occasions __________ I got caught in a traffic jam in trouble.A. thatB. whichC. whereD. when4. ---I wonder what makes you a successful manager.---I ________ as a waiter for five years, which contributes a lot to my today’s work.A. serveB. have servedC. had servedD. served5. __________, as long as I’m with nature, I don’t care.A. However tough the journey isB. Whatever tough the journey isC. However the journey is toughD. Whatever the journey is tough6. --- It’s no easy task to catch a ticket on a website that receives 1 billion clicks daily.--- I can’t agree with you more. There ________ be errors for every single step.A. shouldB. mustC. willD. can7. Chery, a car maker in Anhui province, sold nearly 700,000 units in 2013, with the total value ________ it was in 2005.A. more than three times whatB. three more times than thatC. over three times than whatD. over three times of that8. ---When can I use your computer?---Never! ________ should you touch it.A. In no timeB. At no timeC. At any timeD. At one time9. --- It annoys me a lot that my daughter always contradicts my viewpoints.--- Take it easy. It is common that frictions ______ between parents and children in adolescence.A. drop outB. set outC. work outD. stand out10. My calculations were based on the ______ that house prices would remain steady.A. administrationB. acquisitionC. assumptionD. application11. --- What do you think of the UNICEF?--- Great. Its programs have saved thousands of children in Africa who would ________ have died from lack of food or terrible diseases.A. insteadB. otherwiseC. thereforeD. moreover12. When the disease was spreading across the continent, it caused panic among people. What added to the panic is that doctors find it hard to establish the _________ nature of the virus causing the disease.A. preciseB. fragileC. delicateD. ambiguous13. --- Hi, John. Haven’t seen you for ages!--- I ______ to America to deal with the trade conflict.A. was sentB. had been sentC. will be sentD. have been sent14. --- Did you enjoy yourself at Jack’s birthday party last Saturday?--- ______! I’d never had a better time in my life.A. That’s all rightB. Not reallyC. Don’t mention itD. You bet15. Only since April 1895, when the government of the Qing Dynasty was forced to sign theTreaty of Shimonoseki(马关条约), ________ its own name for the area where the Diaoyu Islands ______.A. did Japan have; are being locatedB. has Japan had; are locatedC. Japan had; are locatingD. had Japan had; are located第二节完形填空(共20小题;每小题1分,共20分)I’m convinced that we can have a profound effect on anyone with whom we come into contact. The right words at just the right time could totally change someone’s life.When I was three years old, my parents discovered I was totally deaf, a situation which forced them to make crucial decisions about my education. After consulting with many doctors, they made a __16__ that would forever change my future. __17__ sending me to a private school for the deaf, they decided to “mainstream” me. All of my schoolmates and teachers would have __18__ hearing.I experienced great __19__ throughout primary school because, in addition to the efforts of “__20__” with the other students, I also __21__ with most of my schoolwork. I was convinced that my parents and teachers were deeply disappointed at me. But, Mrs. Jordan, my 5th grade teacher, changed all of that with a __22__ three-word phrase.On one sunny afternoon, she asked the class a question. I __23__ her lips from my front-row seat and immediately raised my hand. I couldn’t believe it—despite my fears, I felt unusually __24__because—for once—I was sure I had the right answer. I took a deep breath and __25__ answere d Mrs. Jordan’s question. I will never forget what happened next.Her response __26__ all of us. Mrs. Jordan enthusiastically __27__ her right foot on the floor and waved her right finger in a full circle __28__ it pointed directly at me. With shining eyes and a wide smile she cried, “THAT’S RIGHT STEPHEN!”For the first time in my young life, I was an instant star. My heart burst with __29__ and I sat a little __30__ in my chair and puffed out my chest. My confidence __31__ like never before. I decided right then and there that I would make a __32__ for myself in this world. No matter how many obstacles I might encounter in life, I knew I could overcome them. The very three-word phrase had totally __33__ my young life.From that day forward, my __34__ and speech improved fantastically. My peers suddenly looked at me with new respect and my view on life __35__ a complete turnabout(转变). And it all started with Mrs. Jordan. “THAT’S RIGHT STEPHEN!”16. A. plan B. choice C. promise D. decision17. A. Instead of B. Apart from C. Regardless of D. Far from18. A. weak B. sharp C. normal D. different19. A. anxiety B. honour C. sympathy D. excitement20. A. getting away B. putting up C. fitting in D. coming up21. A. handled B. struggled C. disagreed D. engaged22. A. regular B. polite C. simple D. formal23. A. found B. understood C. saw D. read24. A. embarrassed B. frightened C. confident D. jealous25. A. gently B. luckily C. nervously D. carelessly26. A. enjoyed B. surprised C. delighted D. fooled27. A. stamped B. placed C. stepped D. knocked28. A. if B. unless C. since D. until29. A. pride B. regret C. courage D. envy30. A. taller B. shorter C. longer D. wider31. A. declined B. rose C. raised D. acted32. A. home B. fortune C. place D. name33. A. devoted B. surrounded C. occupied D. transformed34. A. grades B. health C. characters D. growth35. A. set B. made C. turned D. got第二部分:阅读理解(共15小题;每小题2分,共30分)ALumberjack ArtWhen people think of an artist, they probably do not imagine a lumberjack(伐木工人) cutting down trees with a chainsaw. Yet many lumberjacks consider themselves to be artists. Instead of patiently working on a large block of hard rock, however, lumberjack artists use chainsaws to carve their masterpieces from wood.Wooden sculptures created with chainsaws are perfect examples of folk art. Everyday tools are used to create art that focuses on subjects found in nature, such as bears or other forest animals. Not all lumberjacks are artists, but some chainsaw artists have been lumberjacks.A lumberjack who is also an artist might cut down a tree during a workday. If the stump, the bottom of the tree, is a good size, the artist might be motivated to sculpt the stump into the shape of a forest animal. The chainsaw artist might also carve other large blocks of wood. Sometimes a homeowner might cut down a tree in the yard and then hire a chainsaw artist to create an outdoor sculpture from the stump. So, this art owes its origins to everyday tasks and nature.The origins of chainsaw art may be humble(不起眼的), but the practice has expanded well beyond turning a stump into a sculpture. In some ways chainsaw artists are like traditional woodcarvers. One artist said that using chainsaws was simply more practical. This person began his work as a traditional woodcarver—that is, he used hand tools to carve the wood into the shapes he wanted. To save time, he began using a chainsaw to remove some parts of the wooden block. This artist realized that the chainsaw not only cut down large pieces of wood quickly, but also produced a distinctive and beautiful pattern on the wood. These patterns would not he seen in other pieces of art. Eventually, the artist began using the chainsaw for nearly all of his carvings.However unusual it may seem, chainsaw art is here to stay. The final test of success for any type of art is the enthusiasm and acceptance of the public. The conclusion is: people love watching chainsaw artists work, and people love the sculptures they create.36. What do we know about chainsaw artists?A. They are originally traditional lumberjacks.B. They create masterpieces in woods and forests.C. They introduce a new concept of artists to people.D. They produce their sculptures while cutting down trees.37. Chainsaw art _________.A. is a kind of folk artB. is hard to be spreadC. focuses on modern themesD. needs time to be mastered38. What is mainly discussed in Paragraph 4?A. The origins of the lumberjack art.B. The experiences of a chainsaw artist.C. The procedure for creating a chainsaw sculpture.D. The application of chainsaw in the lumberjack art.BIt was a dangerous period for Nancy when her own fortunes were concerned. She had to rely on freelance(自由撰稿) work for six months after Quality Weekly Magazine folded. The regular salary cheque had always seemed very small, but now it was like lost riches. She sent many articles to other magazines. Sometimes she struck it lucky and got a task. She once wrote a short article of a politician who appreciated her fair-minded approach and gave her some secret information. Her article was noticed by an editor in search of something sharp and fresh. And Nancy was getting a name for sharp comment. In this trade, she saw, you didn’t need so much to be up to date with things as ahead of them, lying in wait for circumstance, ready to jump.Then one day she walked into the offices of National Daily. It had taken her article and its editor had looked kindly upon her. Having handed over a piece on the latest educational theories she’d written, she fell into conversation with a woman she had known before. She learned that one of the paper’s regular columnists had quitted the job. So Nancy made the necessary phone call to apply for the job.And then, the phone call came. She’d have a weekly column with her photograph next to it. There’d be a salary cheque, and perhaps fame and success to follow that. She realized that the job presented her with a wonderful opportunity.Later, when she was alone, Nancy thought that her appointment had probably been a piece of good fortune. However, she refused to allow the word “luck”. She must have got the job because she was good and experienced. What she never knew was that in fact the editor had been at the point of offering the column to another writer, Alex. When he was about to pick up the phone to call Alex, the colleague he most disliked walked into his office, and spoke with satisfaction of the possibility of closer association with this old friend of his. As soon as the colleague was out of the room, he reached for the phone, and rang Nancy.39. Why did Nancy spend a dangerous period?A. Because freelance work was difficult to do.B. Because she reported some secret information.C. Because her regular salary cheque was too small.D. Because she lost the job in Quality Weekly Magazine.40. Nancy thought the secret of success as a journalist was to _________.A. make positive commentsB. wait and grasp the chanceC. get along well with editorsD. keep up with the latest information41. In the last paragraph, the underlined part “this old friend of his” refers to _________.A. the colleagueB. the editorC. AlexD. Nancy42. What can we infer from the passage?A. The new job presented Nancy with pressure.B. Nancy got the job in National Daily by chance.C. Regular columnists are better than freelance writers.D. Working hard is the key to gaining popularity for a writer.CRunning on EmptyFor almost a century, scientists have assumed, tiredness—or exhaustion—in athletes originates in the muscles. Precise explanations have varied, but all have been based on the "Limitations Theory". In other words, muscles tire because they hit a physical limit: they either run out of fuel or oxygen or they drown in harmful by-products(副产品).In the past few years, however, Timothy Noakes from the University of Cape Town, SouthAfrica, has examined this standard theory. Tiredness, he argues, is caused not by signals springing from overtaxed muscles, but is an emotional response which begins in the brain. The fundamental nature of his new theory is that the brain paces the muscles to keep them well back from the edge of exhaustion. When the brain decides it’s time to quit, it creates unbearable muscle tiredness. This “Central Governor” theory remains controversial, but it does explain many puzzling aspects of athletic performance.A recent discovery that Noakes calls the “lactic acid paradox” made him start researching this area seriously. Lactic acid is a by-product of exercise, and the increase of it is often mentioned as a cause of tiredness. But when research subjects exercise in certain conditions created artificially, they become tired even though lactic acid levels remain low. Nor has the oxygen content of their blood fallen too low for them to keep going. Obviously, something else was making them tire before they hit either of these physiological limits.Noakes conducted an experiment with seven cyclists. It has long been known that during exercise, the body never uses 100% of the available muscle fibres(纤维). The amount used varies, but in some tasks such as this cycling test the body calls on about 30%. His team found that as tiredness set in, the electrical activity in cyclist’s legs declined—even when they were making a great effort to cycle as fast as they could.To Noakes, this was strong evidence that the old theory was wrong. “The cyclists may have felt completely exhausted,” he says, “but their bodies actually had considerable reserves that they could theoretically tap by using a greater amount of the resting fibres.” This, he believes, is the proof that the brain is regulating the pace of the workout to hold the cyclists well back from the point of extreme tiredness.43. Which of the following is supported by the “Limitations Theory”?A. Tiredness is caused by signals from brain.B. Athletes feel tired when they use up all their energy.C. The body uses 100% of the muscle fibres in exercise.D. Athletes become tired though lactic acid levels remain low.44. Noakes has found out that _________.A. muscle fibres control athletes’ movementsB. lactic acid levels remain high in cycling testC. mental processes control the symptoms of tirednessD. different exercises use different amount of muscle fibres45. It is likely that both theories accept that _________.A. lactic acid is produced in muscles during exerciseB. the oxygen content in blood may rise after sportsC. tiredness is a harmful by-product of exerciseD. the energy in human bodies can be balanced46. What is Paragraph 3 mainly about?A. The description of a new test.B. The explanation of the theory.C. The puzzling evidence of a study.D. The whole process of the research.DEarly this morning, I got up to make a batch of Rice Krispie Treats for my neighbor across the hall. She barely greets me when we see each other, and her sweet little boy, who’s now four, has picked up her mother’s manner and will not talk to me, either.La st Monday, she had called the firefighters when a pan I’d forgotten on the stove caused my flat to fog up while I was out taking a walk. When I came home, the street in front of ourapartment house was blocked by a police car, a fire truck and an ambulance! The instant I saw them, I remembered the pan! Luckily, nothing serious had happened, and all my neighbors agreed with the firefighter who said, “It could have happened to anyone.” When I thanked the neighbor who had called the firefighters—let’s call her Ivy—and apologized for causing the trouble, she just asked if my cats were all right. When I said they were fine, she said, “Well, that’s ok then,” and turned into her flat. I felt strangely safe, knowing that even though we don’t get along, she’d done th e right thing and didn’t blame me. So, the Rice Krispie Treats.Last Christmas, my neighbor carelessly let it out that she was holding a grudge(怨恨) towards me because of an incident we’d had four years ago. I had particularly apologized and asked if there was anything I could do to improve our relationship. She would not accept my apology.It had taken me a lot of courage to apologize and ask that question instead of insisting that we both shared responsibility for what had happened. Her flat-out refusal to make amends(补偿) really shocked and saddened me. After that, I decided I’d just leave her be—a relationship takes two to work. So, you see, I was really scared she was going to refuse my offer again, leaving me standing on her doorstep, facing the closed door and holding my plate of treats. I know some people have a hard time understanding how the possibility of rejection can make an adult so afraid, but that’s just the way I felt.Then, I reminded myself of how loving and good I had felt yesterday when I’d done some random acts of kindness(thanks to helpothers. Org), after telling myself: Feel the fear, and do it anyway! So I put the squares of Rice Krispie Treats on a beautiful plate, opened my apartment door—and there she was, standing in the hallway. I smiled and sai d, “Hi,” but when she saw me, she turned on her heels and went back inside, even though she seemed to have just stepped out. I went after her, regardless, and quickly said, “I’m sorry, I’ve got something for you! I just wanted to tell you how grateful I am that you were paying attention on Monday. ” When she heard me speaking, she turned around. As I held the plate towards her, explaining these were very sweet American treats, and that she could just try and see whether she and her family would like them, her eyebrows winged up—and she took the plate. I was so happy and excited. We then talked a bit about how she’d become aware of the smoke in my flat, and parted ways.Back in my place, I did a “happy dance”, because I had dared to be kind even though I hadn’t been sure at all my kindness would be welcome. I do hope that our relationship will slowly get better; I know I was and still am biased(存有偏见) towards her at times, but even if we don’t make amends, I want to be able to be kind without depending on other people’s behaviors and reactions.47. The neighbor held a grudge towards the writer most probably because __________.A. the writer’s cat s disturb her neighbor frequentlyB. the writer didn’t thank her for calling the firefightersC. the writer never apologized to her for her misbehaviorsD. the writer had an unpleasant experience with the neighbor long ago48. From Paragraph 4, we can learn that the author __________.A. was afraid of being rejected again by her neighborB. didn’t know how to get along with her neighborC. didn’t admit it was her fault in the last incidentD. refused to forgive her neighbor’s rude behavior49. After the wri ter said “Feel the fear, and do it anyway!”, she decided to __________.A. do an act of kindnessB. leave her neighbor beC. apologize to her neighbor once moreD. do something to let her neighbor down50. What does the author try to tell us?A. Do n’t punish yourself because of others’ mistakes.B. We should be kind to others, regardless of their behavior.C. We must keep a good relationship with our neighbors.D. When we make a mistake, we should have the courage to admit it.第三部分:任务型阅读(共10小题;每小题1分,共10分)Made In the USA: An Export BoomIn his State of the Union address two years ago, President Obama argued that in order to recover from the economic recession, one of the few things the U.S. needed to do was to export more goods around the world. That night, the president unveiled a new goal: to double U.S. exports over the next five years. It would be an increase that the president said would “support two million jobs in America.”Most economists dismissed the promise at the time as something unrealistic, but two years later, the U.S. is on pace to meet that goal. American exports are up 34 percent since the president gave that speech, and the number continues to rise.Competitive In A Global MarketMarlin Steel, a metal working business in Baltimore, makes parts that ship all across the world. “We export to 36 countries,” owner Drew Greenblatt tells All Things Considered Host Guy Raz. “We’re working around the clock, and we’re growing.”It’s not just advanced manufacturing exports on the rise, but pork, cattle and all kinds of agricultural exports are up as well. Even American craft beer has found an export market.Flying Dog CEO Jim Caruso says that increasingly, people all over the world are trying the beer from the Maryland-base d brewery. Caruso says, “Even in those top beer-producing countries, a competitive American product is finding a market.”Services Are Exports, TooAnother place exports are coming from is New York City—in particular, the 30th floor of a Manhattan skyscraper on 5th Avenue and 52nd Street. That’s where the consulting firm Kurt Solomon lies. It doesn’t actually produce a product for export; it provides management advice and strategy.“Four out of every five Americans is now employed in the service industry,” the nation’s top trade official, Ron Kirk says, “Services are a significant part of our exports, and make up about a quarter of our exported goods.” These services can include everything from legal consulting, finance, information technology and even engineering.And There Are Other FactorsSo why has there been an increase of more than 30 percent for exports in almost everything? Part of the increase, at least for the manufacturing side, is due to better technology, says Tyler Cowen, an economist. “A lot of it is being driven by smart machines,” he tells Raz, “The U.S. has high wage rates, which is a disadvantage, but if machines are doing a lot of the work, that doesn’t matter.”China factors a lot in America’s export economy, too. “Wages in China have bee n going up as the country becomes more productive. Thus China is losing the cheap labor advantage it has held for some time.” Cowen says.Will Jobs Grow, too?“Companies have become more productive by dismissing workers and lowering costs.” Cowen says. “So I don’t view exporting as a way of creating a very large number of jobs, but itwill create more profits.”So not every business or worker is necessarily benefiting from the export boom in the U.S., and Cowen says that could ultimately lead to a polarization(两极) of economic outcomes.在科技日益发达的今天,人们获取知识与信息的途径有很多,但是我们还是鼓励更多的人阅读。