限时训练2

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2019年秋教科版九年级上册:物理限时训练二

2019年秋教科版九年级上册:物理限时训练二

2019年秋教科版九年级上册物理限时训练二一、填空题1.汽车在平直公路上匀速行驶9.2km,消耗燃油1kg,已知汽车的牵引力是2000N,则汽车发动机的效率是_____。

(燃油热值取4.6×107J/kg)2.利用先进工艺和科学方法,可以使垃圾变废为宝。

若从1吨垃圾中能提炼出140kg燃料油,燃料油的热值为4.5×107J/kg,则这些燃料油完全燃烧时释放出的热量为_____J,这些热量可以使_____kg的水温度升高50℃.[水的比热容为4.2×103J/(kg•℃)]3.热水瓶注入一定量的热水后,立即盖上软木塞,软木塞会跳起来,在这一现象中瓶内气体的______能转化为软木塞的_______能,该能量转化过程与汽油机的___冲程相同。

4.太阳能热水器吸收1.4×107J的能量能把质量为20kg的水从25℃加热到75℃,则水吸收的热量为_______J,热水器的热效率为________.[水的比热容为4.2×103J/(kg℃)]5.图中单缸四冲程汽油机正处在_______冲程。

若该汽油机转速为1800r/min,则它每秒钟完成______冲程。

用水循环带走汽油机产生的热量,这是利用了水的________较大的特性。

6.如图所示,在空气压缩引火仪玻璃筒的底部放一小团干燥的棉花,用力将活塞迅速下压,棉花被点燃,此过程的能量转化方式与汽油机的_______冲程相同;某效率为25%的汽油机在一次工作中消耗了体4kg汽油,该汽油机对外做的机械功为______(汽油热值为4.6×107J/kg)7.用液化气灶烧水,把1.5kg初温为20℃的水加热到100℃,需要吸收的热量为_____J.若上述过程中完全燃烧了0.021kg液化气,且只有60%的热量被水吸收,则液化气的热值为_____J/kg。

[c水=4.2×103J/(kg•℃)]8.某种国产汽车,当它在某平直公路上以20 m/s速度匀速行驶时,每百公里的油耗为6 L,汽车行驶500 s,则汽车消耗的汽油是__________________L,假设汽车在运动过程中受到的平均阻力是495 N,则汽油机的效率是____________________% (已知汽油的热值是3.3×107 J/L)。

不等式限时训练二

不等式限时训练二

不等式限时训练二一、选择题(共8个小题,每小题5分,满分40分)1.已知x >0,y >0,lg 2x +lg 8y=lg 4,则1x +13y的最小值是( A )A .2B .2 2C .4D .2 3解析:由lg2x+lg8y=lg4得xlg2+3ylg2=2lg2,即x +3y =2. 于是1x +13y =12(x +3y)·(1x +13y )=12(2+3y x +x 3y )≥12(2+23y x ·x3y)=2,当且仅当x =3y =1时取等号,故1x +13y的最小值是2.2.已知x>0,y>0,x +2y +2xy =8,则x +2y 的最小值是( B )A .3B .4 C.92D.112解析:依题意得(x +1)(2y +1)=9, (x +1)+(2y +1) ≥2x +12y +1=6,x +2y ≥4,即x +2y 的最小值是4.3.设a >0,b >0,且不等式1a +1b +ka +b≥0恒成立,则实数k 的最小值等于(C)A .0B .4C .-4D .-2解析:由1a +1b +k a +b ≥0得k ≥-a +b 2ab,而a +b 2ab=b a +ab+2≥4(a =b 时取等号),所以-a +b 2ab ≤-4,因此要使k ≥-a +b 2ab恒成立,应有k ≥-4,即实数k 的最小值等于-4.4.过定点P(1,2)的直线在x 轴与y 轴正半轴上的截距分别为a ,b ,则4a 2+b 2的最小值( B )A .8B .32C .45D .72解析:因为a >0,b >0,1a +2b=1,所以(2a +b)·1=(2a +b)(1a +2b )=2+2+b a +4ab≥8,当且仅当b a =4a b ,即2a =b =4时等号成立,所以(4a 2+b 2)(1+1)≥(2a +b)2≥64.所以4a 2+b 2≥32,当且仅当2a 1=b 1=4时等号成立.所以(4a 2+b 2)min =32.5.设f(x)=|2-x 2|,若0<a <b 且f(a)=f(b),则a +b 的取值范围是(B )A .(0,2)B .(0,22)C .(0,4)D .(0,2)解析:若0<a <b <2,则有f(a)>f(b),与f(a)=f(b)矛盾;若2<a <b ,则有f(a)<f(b),与f(a)=f(b)矛盾,故必有0<a <2<b ,因此由|2-a 2|=|2-b 2|得2-a 2=b 2-2,∴a 2+b 2=4, 故a +b 2≤a 2+b22=2(a =b 时取等号),∴0<a +b <2 2. 6.(2011·惠州模拟)若x 、y 、z 均为正实数,则xy +yzx 2+y 2+z2的最大值是( A )A.22B. 2 C .2 2 D .2 3解析:∵x ,y ,z ∈(0,+∞),∴x 2+y 2+z 2=x 2+12y 2+12y 2+z 2≥2x 2·12y 2+212y 2·z 2=2(xy +yz),当且仅当x =z =22y 时取等号,令u =xy +yz x 2+y 2+z 2,则xy +yzx 2+y 2+z2≤xy +yz 2xy +yz =22,∴当且仅当x =z =22y 时,u 取得最大值22. 7.设0a b <<,则下列不等式中正确的是 (B )(A ) 2a b a b +<<<(B )2a ba b +<<(c )2a b a b +<<<2a ba b +<<< 【分析】根据不等式的性质,结合作差法,放缩法,基本不等式或特殊值法等进行比较.(方法一)已知a b <和2a b+<,比较a 因为22()0a a a b -=-<,所以a <,同理由22()0b b b a -=->得b <;作差法:022a b b a b +--=>,所以2a b b +<,综上可得2a ba b +<<<;故选B .(方法二)取2a =,8b =4=,52a b +=,所以2a ba b +<<<. 8.函数)(x f 的定义域为R ,2)1(=-f ,对任意R ∈x ,2)(>'x f ,则42)(+>x x f 的解集为 BA .(1-,1)B .(1-,+∞)C .(∞-,1-)D .(∞-,+∞)二、填空题(共3小题,每小题5分,满分15分)9.设f(x)=1ax 2-bx +c ,不等式f(x)<0的解集是(-1,3),若f(7+|t|)>f(1+t 2),则实数t 的取值范围解析:∵1a x 2-bx +c<0的解集是(-1,3)∴1a >0且-1,3是1a x 2-bx +c =0的两根,∴⎩⎪⎨⎪⎧ a>0-1+3=ab -1×3=ac ⇒⎩⎪⎨⎪⎧a>0ab =2ac =-3. ∵函数f(x)=1a x 2-bx +c 图象的对称轴方程为x =ab2=1,且f(x)在[1,+∞)上是增函数,又∵7+|t|≥7>1,1+t 2≥1,则由f(7+|t|)>f(1+t 2),得7+|t|>1+t 2, 即|t|2-|t|-6<0,亦即(|t|+2)(|t|-3)<0,10..已知a 、b ∈R +,且a +b =1,则4a +1+4b +1的最大值是 2 (4a +1+4b +1)2=(1×4a +1+1×4b +1)2≤(12+12)(4a +1+4b +1)=12. 11.设x ,y ,z 为正实数,满足x -2y +3z =0,则y2xz的最小值是____3____.解析:由x -2y +3z =0得y =x +3z 2,代入y 2xz 得x 2+9z 2+6xz 4xz ≥6xz +6xz4xz =3,当且仅当x =3z 时取“=”.12.若,,x y z 是正数,且满足()1xyz x y z ++=,则()()x y y z ++的最小值为______。

备战2022年高考数学寒假选择题+填空题精准限时训练 2(全国卷版)(解析版)

备战2022年高考数学寒假选择题+填空题精准限时训练 2(全国卷版)(解析版)

备战2022年高考数学寒假选择题+填空题精准限时训练2(全国甲乙卷版)(建议用时40-45分钟)一、单选题(本题共12小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的.)1.(2022·全国·高三专题练习)已知集合{}1,3A =,{}03,B x x x N =<<∈,则A B = ()A.{}1B.{}1,2C.{}1,2,3D.{}1,32.(2022·全国·高三专题练习(理))为了解学生体育锻炼情况,某学校随机抽取甲,乙两个班级,对这两个班级某一周内每天的人均体育锻炼时间(单位:分钟)进行了数据统计,得到如下折线图:下列说法正确的是()A.班级乙该周每天的人均体育锻炼时间的极差比班级甲的大B.班级甲该周每天的人均体育锻炼时间的中位数为72C.班级乙该周每天的人均体育锻炼时间的众数为65D.班级甲该周每天的人均体育锻炼时间的平均数比班级乙的大3.(2022·全国·高三专题练习)已知复数z 满足()2i 34i z +=+(其中i 为虚数单位),则复数z =()A.2i-B.2i-+C.2i+D.2i--4.(2022·全国·高三专题练习)“天问一号”是我国自主研发的第一个火星探测器,于2020年7月23日发射升空,2021年2月10日成功地进入火星轨道,并于2021年3月4日传来3幅高清火星影像图.已知火星的质量M 约为236.417110kg ⨯,“天问一号”的质量m 约为35.3410kg ⨯,则lgMm≈()(参考数据:lg 20.30≈,lg30.48≈,lg 50.70≈)A.19.22B.19.92C.20.08D.20.485.(2022·全国·高三专题练习(文))已知双曲线C :22221x y a b-=(0a >,0b >)的左、右焦点分别为1F ,2F ,P 为C 左支上一点,212PF PF =,1260F PF ∠=︒,则C 的离心率为()B.26.(2022·全国·高三专题练习(理))某几何体的三视图如图所示,则该几何体的表面积为()A.48+B.24+C.48+D.24+7.(2022·全国·高三专题练习)下列选项中,为“数列{}n a 是等差数列”的一个充分不必要条件的是()A.()1122n n n a a a n +-=+≥B.()2112n n n a a a n +-=⋅≥C.数列{}n a 的通项公式为23n a n =-D.()2112n n n n a a a a n ++--=-≥8.(2021·河南·温县第一高级中学高三阶段练习(文))如图,悬崖DE 的右侧有一条河,左侧一点A 与河对岸B ,F 点、悬崖底部E 点在同一直线上,一架带有照相机功能的无人机从A 点沿AD 直线飞行200米到达悬崖顶部D 点后,然后再飞到F 点的正上方垂直飞行对线段EB 拍照.其中从A 处看悬崖顶部D 的仰角为60°,sin 7ABD ∠=,100BF =米,当无人机在C 点处获得最佳拍照角度时(即BCE ∠最大),该无人机离底面的高度为()A.B.C.米D.200米9.(2021·全国·高一课时练习)已知,αβ都是锐角,3sin =5a ,12cos()13αβ+=-,则sin =β()A.1C.5665D.166510.(2021·河南·高三阶段练习(理))2021年国庆节期间,小李报名参加市电视台举办的“爱我祖国”有奖竞答活动,活动分两轮回答问题,第一轮从5个题目中随机选取2个题目,这2个题目都回答正确,本轮得奖金500元,仅有1个回答正确,本轮得奖金200元,两个回答都不正确,没有奖金且被淘汰,有资格进入第2轮回答问题者,最多回答两个问题,先从5个题目中随机选取1个题目回答,若回答错误本轮奖金为零且被淘汰,若回答正确,本题回答得奖金2000元,然后再从剩余4个题目中随机选1个,回答正确,本题得奖金3000元,回答错误,本题回答没有奖金.已知小李第一轮5个题目其中3个能回答正确,第二轮每个题目回答正确的概率均为25(每轮选题相互独立),则小李获得2500元的概率为()A.54625B.9125C.18125D.92511.(2021·贵州·高三期末(理))在三棱锥S ABC -中,90SBA SCA ∠=∠=︒,底面ABC 是等边三角形,三棱锥S ABC -的体积为3,则三棱锥S ABC -的外接球表面积的最小值是()A.12πB.24πC.6πD.10π12.(2021·黑龙江·哈尔滨三中高三阶段练习(理))已知函数()1e 1a x a f x -=-+(a R ∈且a 为常数),()g x 的图象与()f x 的图象关于1x =对称,且()g x 为奇函数,则不等式()(21)f x f a <-的解集为()A.(,2)-∞B.(2,)+∞C.(3,)+∞D.(3),-∞二、填空题:(本题共4小题,每小题5分,共20分。

(全国卷)高考英语二轮复习 强化技能限时训练(二)语法填空(有提示词类试题)阅读理解-人教版高三全册

(全国卷)高考英语二轮复习 强化技能限时训练(二)语法填空(有提示词类试题)阅读理解-人教版高三全册

强化技能限时训练(二)语法填空(有提示词类试题)+阅读理解(限时30分钟)Ⅰ.语法填空( A )1. She was put under house arrest two years ago but remained a powerful (symbolic) in last year’s election.2. She wished that he was as easy (please) as her mother,who was always delighted with perfume.3.As time went on,the old man’s health is getting from bad to (bad).4.The (tall) of the two girls is the girl I always talk about with you.5.Only (environment) problems are discussed at the meeting.6.It is a well-known fact that smoking is (harm) to our health.7.As we all know,English is (wide) used in our daily life.8. Mary felt (please),because there were many empty seats in the room.9. What was so (impress)about Jasmine Westland’s victory was that she came first in the marathon bare-footed.10. She turned off her phone and (rejoin) them at the table.答案与剖析:1.symbol 此题考查派生词的用法。

2022年广东省深圳市中考英语限时训练二

2022年广东省深圳市中考英语限时训练二

英语限时训练二预计时间:45分钟第一部分选择题(50分)1.完形填空(10分)Have you ever thought of your purpose in life? If you don't, you have to think about it seriously. Youwill lose yourself and you will 1 to know what you really want in your life.Here are some 2 about taking steps towards finding your life's purpose.Firstly,make a 3 of the things you do for fun, including some jobs that you prefer,yourhobbies and so on. Imagine you're a millionaire with no worries about money, how would you choose to 4 your time? Add those things 5 the list, even if you don't do them at present. This list isabout your passions(热情)—the things that you would do 6 for the pleasure they give you.Then 7 the names of people you admire(钦佩)most, and the reasons why they attract you. Youmight admire an inventor for his love for creating something 8 . Or you might admire an actress foralways being true to herself. Take these admirations of others 9 a way for you to live in the world.Finally, make a list of the things you do naturally without thinking about them. Such talents may bean eye for detail or a great sense of humor. Some people are 10 at math or music, but there areplenty of other types of talents as well. It's better for us to use our talents for our life purpose.1.A.fail B.need C.decide D.want2.A.advantages B.activities C.tips D.systems3.A.survey B.list C.note D.record4.A.take B.spend C.cost D.save5.A.into B.outside C.over D.away6.A.possibly B.hardly C.properly D.simply7.A.talk about B.ask for C.write down D.dream of8.A.awful B.boring C.old D.new9.A.as B.in C.from D.by10.A.good B.shy C.strict D.angryII.阅读理解(40分)第一节阅读下列短文,从下面每小题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将相应的字母编号涂黑。

新教材高中物理限时训练二

新教材高中物理限时训练二

新教材高中物理限时训练一、选择题(每题 6 分,共60 分)1.我们生活中的物理现象随处可见,下列物理现象分别属于波的()(1)“闻其声而不见其人”;(3)学生围绕振动的音叉转一圈会听到忽强忽弱的声音;(2)在春天里一次闪电过后,有时雷声轰鸣不绝;(4)正在鸣笛的火车向着我们急驶而来,我们听到汽笛声音调变高。

A.反射、衍射、干涉、多普勒效应B.折射、衍射、多普勒效应、干涉C.反射、折射、干涉、多普勒效应D.衍射、反射、干涉、多普勒效应2.一单摆做简谐振动,如图为摆绳对摆球的拉力大小F 随时间t 变化的图像,则该单摆的摆长为(重力加速度g 取10m/s2)()A.0.4m B.1.6m C.4m D.16m3.如图所示为两列频率相同的横波相遇时某一时刻的情况,实线表示波峰,虚线表示波谷,则关于M、N 两点的振动情况描述正确的是()A.M 点始终为加强点,N 点始终为减弱点,所以M 点振动频率比N 点振动频率高B.M 点始终为加强点,N 点始终为减弱点,但是M 点和N 点振动频率相同C.M 点此时为加强点,N 点此时为减弱点,半个周期后M 点变成减弱点,N 点变成加强点D.M 点始终为加强点,N 点始终为减弱点,所以N 点始终位于平衡位置不动4.为了从坦克内部观察外部的目标,在坦克壁上开了一个孔,孔内安装一块玻璃,已知坦克壁的厚度为定值,玻璃的厚度(不能超过坦克壁厚度)和折射率有多种规格可供选择,则为了观察到最大的视野,应该选则()A.折射率大厚度大的玻璃B.折射率小厚度大的玻璃C.折射率大厚度小的玻璃D.折射率小厚度小的玻璃5.一列简谐横波沿直线由a向b传播,相距10.5 m的a、b两处的质点振动图象如图中a、b所示,则以下说法正确的是()A.该A.波由a传播到b可能历时11 sB.该波的波长可能是8.4 mC.该波的波速可能是3.5 m/sD.该波的振幅是20 cm6.一水平长绳上系着一个弹簧和小球,弹簧和小球组成的系统固有频率为2Hz,现让长绳两端P 、Q 同时以相同的振幅 A 上下各振动了一个周期,某时刻长绳上形成的波形如图所示。

高三化学限时训练(2)

高三化学限时训练(2)

小题训练(4)1、下列有关物质分类或归纳的说法中,正确的数目有( )①淀粉和纤维素的化学式都可用(C 6H 10O 5)n 表示,它们互为同分异构体②聚乙烯、油脂、铜氨纤维、光导纤维都属于高分子③氨水、冰醋酸、水都是电解质 ④漂白粉、水玻璃、福尔马林都是混合物⑤干馏、裂化、盐析都是化学变化 ⑥植物油、直馏汽油、环己烷都可以用来萃取溴水中的溴单质 A .1 B .2 C .3 D .4 2、下列有关实验原理或实验操作正确的是( ) A .用水湿润pH 试纸测量某溶液的pHB .用量筒量取20mol ▪L -1H 2SO 4溶液于烧杯中,加水80mL ,配制成0.1000 mol ▪L -1H 2SO 4溶液C .实验室用图2所示装置制取少量氨气D .实验室用图3所示装置除去Cl 2中混有的少量HCl3、下列有关实验操作或判断正确的有 ( ) ①用10 mL 量筒准确量取稀硫酸溶液8.0 mL ;②用干燥的pH 试纸测定氯水的pH ;③能说明亚硝酸是弱电解质的是:用HNO 2溶液作导电试验,灯泡很暗④使用容量瓶配制溶液时,俯视液面定容后所得溶液的浓度偏大;⑤将饱和FeCl 3溶液滴入蒸馏水中即得Fe(OH)3胶体;⑥圆底烧瓶、锥形瓶、蒸发皿加热时都应垫在石棉网上⑦除去铁粉中混有的少量铝粉.可加入过量的氢氧化钠溶液,完全反应后过滤⑧为测定熔融氢氧化钠的导电性,可在瓷坩埚中熔化氢氧化钠固体后进行测量⑨用食醋除去水壶中的水垢A .3个B .4 个C .5个D .6个 4、下列叙述中,不正确的是 ( ) ①熔点:金刚石>晶体硅>单质硫 ②气态氢化物稳定性:H 2O>HF>H 2S③同一主族的元素的氢化物,相对分子质量越大,它的沸点一定越高④因为常温下白磷可自燃,而氮气须在放电时才与氧气反应,所以非金属性:P>N⑤ⅥA 、ⅦA 族元素的阴离子与同周期稀有气体元素的原子具有相同的核外电子排布A .①②③B .②③④C .②④⑤D .①③⑤ 5、下列判断正确的是 ( )A .某一元酸(HA )溶液加入一种强碱溶液,反应后溶液呈中性。

八年级下册物理限时训练(二)含答案

八年级下册物理限时训练(二)含答案

八年级下册物理限时训练(二)1.关于力、力和运动的关系,下列说法中不正确的是()A.施力物体一定也是受力物体B.物体不受力,运动状态一定不改变C.两个不接触的物体间一定没有力的作用D.力不能脱离物体而单独存在2.忽略空气阻力,抛出的铅球在空中运动轨迹如图所示,则下列对抛出后的铅球,分析正确的是()A.铅球受到沿运动方向的推力,在这个力作用下继续运动B.铅球受到重力和推力,在这两个力作用下继续运动C.铅球不受力,靠惯性继续运动D.铅球受到重力作用,运动状态不断发生变化3.下列现象中,不能用惯性解释的是()A.人走路时有时会绊倒B.子弹从枪膛飞出枪外后,继续向前运动C.用力将伞上的水甩掉D.地上滚动的球最终会停下来4.如图所示,跳水运动员站在跳板上静止不动,下列说法正确的是()A.跳板被压弯说明力可以改变物体的运动状态B.运动员对跳板的压力和运动员所受的重力是一对平衡力C.跳板对运动员的支持力和运动员对跳板的压力是一对平衡力D.跳板对运动员的支持力和运动员所受的重力是一对平衡力5.如图所示的各种情形中,两个力是平衡力的是()A. B. C. D.6.如图是运动员顶足球时的情景,忽略空气阻力,下列说法正确的是()A.球被顶出,说明力可以改变物体的运动状态B.顶出去的球在上升过程中,受到平衡力的作用C.球在上升过程中,受到一个向上的力D.顶出去的球最终落地,是由于球具有惯性7.下列实例中,目的是为了增大摩擦的是()A.旅行箱安装小轮子B.给自行车的车轴上机油C.自行车轴承中装有滚珠 D.自行车轮胎上制有凹凸的花纹8.如图所示,某同学沿水平方向用75N的力推箱子,下列分析不正确的是()A.若该同学没有推动箱子,箱子所受摩擦力为75NB.若箱子被推动,箱子在滑行过程中所受摩擦力大小为75N,方向水平向左C.若该同学推箱子的推力增大,箱子所受摩擦力也可能增大D.若箱子被推动,箱子在滑行过程中撤去推力,箱子会由于惯性继续运动一段时间9.秋千荡到最高点时,如果受到的力全部消失,下列现象可能会发生的是()A.继续来回摆动 B.做匀速直线运动C.保持静止状态 D.做匀速圆周运动10.下列关于惯性的说法中,正确的是()A.人走路时没有惯性,被绊倒时有惯性B.交通规则中要求司机系安全带,是为了减小司机的惯性C.物体没有受外力作用时有惯性,受外力作用后惯性被克服了D.物体的惯性与物体的运动状态及受力情况均无关11.2022年3月23日,“天宫课堂”上王亚平轻推静止的“冰墩墩”,“冰墩墩”沿直线运动到对面叶光富的手中。

山东德州2014届高考英语一轮语法限时训练2

山东德州2014届高考英语一轮语法限时训练2

山东德州2014届高考英语一轮语法限时训练2(时间:15分钟分数:27分)Ⅰ.单项选择(每题1分,共20分)1.(2012·江西卷)By 16:30,________ was almost closing time,nearly all the paintings had been sold.A.which B.when C.what D.that答案A[句意:到了16:30,差不多是关门的时间了,几乎所有的画都卖完了。

定语从句缺少主语,使用关系代词which引导。

when是关系副词;what 不能引导定语从句;that不能引导非限制性定语从句。

]2.(2012·湖南卷)Care of the soul is a gradual process __________ even the small details of life should be considered.A.what B.in whatC.which D.in which答案D[句意:对于心灵的关爱是一个渐进的过程,在这个过程中,即使是生活的小细节也应该考虑到。

根据主从句之间的关系可知,空格处所填词引导定语从句,且在从句中作状语,所以选D项,in which指代in the process。

] 3.(2012·四川卷)In our class there are 46 students,______ half wear glasses.A.in whom B.in them C.of whom D.of them答案C[句意:在我们班上有46个学生,其中有一半的学生戴眼镜。

做此题可用排除法。

因空格前有逗号,而无连接词,再分析句子结构可以判断,这是个非限制性定语从句,故首先排除B、D两项。

再根据句意可知,此处指其中的一半,表所属关系应该用of。

]4.(2010·重庆卷)In China,the number of cities is increasing ________ development is recognized across the world.A.where B.which C.whose D.that答案C[考查定语从句。

2021届高考英语一轮复习课下限时训练作业2Word版含答案

2021届高考英语一轮复习课下限时训练作业2Word版含答案

必修1Unit 2English around the worldⅠ.单项填空1.(2022·江西六校高三联考)—Will you join us in the Talent Show?—Thank you,________A.but why not?B.but I’d rather not.C.and I won’t.D.and I’ll join.2.(2022·桂林部分学校高三质量检测)The happiest people don’t have the best of everything.Theyjust________everything.A.get away from B.make the best ofC.fix attention on D.catch up with3.(2022·江西六校高三联考)The decision about which college to go to cannot be made by any one ofus________yourself.A.more than B.other thanC.rather than D.better than4.(2022·安徽省芜湖三校一模)A recent study has ________an unexpected conclusion that the African elephant should be divided into two different species.A.kept up with B.made up withC.caught up with D.come up with5.—He failed the exam again!What should I do,Miss Wang?—In my opinion,your son is________than stupid.A.quite lazier B.much lazierC.more lazy D.lazier rather6.(2022·南京一模)When________comes to an interview day,we’ve got many things in mind,such as being on time and giving proper answers.A.that B.thisC.it D.one7.(2022·苏锡常镇四市调研)You know it’s love when all you want is that person to be happy,________you’re not part of their happiness.A.even if B.as ifC.if only D.if ever8.—According to my grandma,it is a good idea to eat chicken soup when you have a cold.—________,scientists agree with her.A.Sooner or later B.Once in a whileC.To be exact D.Believe it or not9.She will tell us why she feels so strong that each of us has a role________in making the earth a better place to live in.A.to have played B.to playC.to be played D.to be playing10.(2022·福州模拟)Oprah (奥普拉),the queen of American daytime talk TV,is________as one of the most powerful women in the world.A.raised B.recognizedC.requested D.recommended11.(2022·衡水中学月考)You________scold such a pupil who always keeps silent so seriously thatyou________hurt him.A.should;can B.may;willC.mustn’t;may D.can’t;must12.(2021·绵阳二诊)—I happened to meet Lily yesterday.—Lucky dog!You ________each other for two years.A.haven’t seen B.hadn’t seenC.didn’t see D.don’t see13.(2021·台州高三检测)Linda’s health is improving________day by day,and the doctor has advised her to stay home for a couple of weeks.A.frequently B.graduallyC.fluently D.actually14.(2021·北京四中高三质检)There is________as a free dinner in this world.As the saying goes,“No pains,no gains.”A.no such a good thing B.such no good thingC.no such good thing D.not so a good thing15.As everybody knows,kangaroos are native________Australia and are often regarded as one of Australia’s national treasures.A.in B.toC.from D.withⅡ.阅读理解A(2021·江西省重点中学协作体第一次联考)Do you want to live with a strong sense of peacefulness,happiness,goodness,and self-respect?The collection of happiness actions broadly categorized (把……归类) as “honor” help you create this life of good feelings.Here’s an example to show how honorable actions create happiness.Say a store clerk fails to charge us for an item.If we keep silent,and profit from the clerk’s mistake,we woulddrive home with a sense of sneaky (暗中的) ter we might tell our family or friends about our good fortune.On the other hand,if we tell the clerk about the uncharged item,the clerk would be grateful and thank us for our honesty.We would leave the store with a quiet sense of honor that we might never share with another soul.Then,what is it to do with our sense of happiness?In the first case,where we don’t tell the clerk,a couple of things would happen.Deep down inside we would know ourselves as a type of thief.In the process,we would lose some peace of mind and self-respect.We would also demonstrate that we cannot be trusted,since we advertise our dishonor by telling our family and friends.We damage our own reputations by telling others.In contrast,bringing_the_error_to_the__clerk’s__attention causes different things to happen.Immediately the clerk knows us to be honorable.Upon leaving the store,we feel honorable and our self-respect is increased.Whenever we take honorable actions we gain the deep internal rewards of goodness and a sense of nobility.There is a beautiful positive cycle that is created by living a life of honorable actions.Honorable thoughts lead to honorable actions.Honorable actions lead us to a happier existence.And it’s easy to think and act honorably again when we’re happy.While the positive cycle can be difficult to start,once it’s started,it’s easy to continue.Keeping on doing good deeds brings us peace of mind,which is important for our happiness.1.According to the passage,the positive action in the example contributes to our________.A.self-respect B.financial rewardsC.advertising ability D.friendly relationship2.The author thinks that keeping silent about the uncharged item is equal to________.A.lying B.stealingC.cheating D.advertising3.The underlined phrase “bringing the error to the clerk’s attention”means________.A.telling the truth to the clerkB.offering advice to the clerkC.asking the clerk to be more attentiveD.reminding the clerk of the charged items4.How will we feel if we let the clerk know the mistake?A.We’ll be very excited.B.We’ll feel unfortunate.C.We’ll have a sense of honor.D.We’ll feel sorry for the clerk.5.Which of the following can be the best title of this passage?A.How to Live TruthfullyB.Importance of PeacefulnessC.Ways of Gaining Self-respectD.Happiness through Honorable ActionsB(2021·济宁高考模拟)A euphemism (from the Greek words eu—well and pheme—speak) is a word or expression that is used when people want to find a polite or less direct way of talking about difficult or embarrassing topics like death or the bodily functions.Most people,for example,would find it very difficult to say in plain language that they have arranged for their sick old dog to be killed.They would soften the pain by saying:We had Ruby put down or We had Ruby put to sleep.Many people prefer to call someone plain than ugly,or cuddly rather than fat.Euphemisms are an important part of every language,but it seems that English has an ever-growing number of them.The non-native speaker not only has to make sense of the euphemisms he hears,he also has to learn which euphemisms are appropriate in any particular situation.He might be aware that his American friend needs to use the toilet when she asks where the bathroom (or restroom,or comfort station) is,but he is less likely to guess that his English friend has the same need when he says he has to see a man about a dog.He might have learned,for example,that in the family way is a euphemism for pregnant.If,however,he says to his boss,“Congratulations!I hear your wife is in the family way,” he would be using an expression that is too familiar for the circumstances.Schools are full of euphemisms.At Frankfurt International School,for example,the special lessons given to students who are having difficulties in their school subjects are called Study Center (in the middle school) and Academic Workshop (in the high school).Teachers rightly do not want to upset students or parents by being too frank or straightforward,and usually choose a softer word or expression to convey the same message.6.According to the passage,people use euphemisms in order to________.A.make themselves understoodB.avoid embarrassmentC.to sound straightforwardD.attract attention7.A person who is described as plain and cuddly is in fact________.A.tall and handsome B.pretty and slimC.ugly but tall D.ugly and fat8.When an English lady says she has to see a man about a dog,she might want to________.A.have her old dog killed B.see an ugly friendC.go to the toilet D.see a pregnant woman9.The main purpose of Paragraph 2 is to________.A.stress that euphemisms are an important part of every languageB.inform readers that English has an ever-growing number of euphemismsC.suggest non-native speakers use euphemisms as often as possibleD.warn English learners to be careful about the meaning and use of euphemisms10.At Frankfurt International School,the students who receive lessons in Study Center________.A.have poor grades in the subjectsB.do well in schoolC.work hard at their lessonsD.prefer to learn more课时作业(二)Ⅰ.单项填空1.解析:考查情景交际。

基础知识限时训练二—人教版九年级物理全一册习题课件

基础知识限时训练二—人教版九年级物理全一册习题课件

基础知识限时训练(二)—2020秋人 教版九 年级物 理全一 册习题 课件(共 18张PP T)
6. 如图J2-2所示电路中,各元件及连接均完好. 下
列对该电路的描述正确的是 A. 开关闭合时,电流表无示数
( D)
B. 开关闭合时,两灯并联
C. 拆去导线b,两灯并联
D. 只须改变一根导线的接法,即可使电路中的两灯
L1和L2并联
基础知识限时训练(二)—2020秋人 教版九 年级物 理全一 册习题 课件(共 18张PP T)
基础知识限时训练(二)—2020秋人 教版九 年级物 理全一 册习题 课件(共 18张PP T)
7. 如图J2-3所示,R为定值电阻,电源电压不变,在a、 b间接一个“2.5 V 0.5 A”的小灯泡时恰能正常发光. 若换接一个“2.5 V 0.6 A”的小灯泡时,则( C )
A. 仍能正常发光 B. 比正常发光亮 C. 比正常发光暗 D. 条件不足,发光程度不能确定
基础知识限时训练(二)—2020秋人 教版九 年级物 理全一 册习题 课件(共 18张PP T)
基础知识限时训练(二)—2020秋人 教版九 年级物 理全一 册习题 课件(共 18张PP T)
二、填空题(本大题7小题,每空1分,共21分) 8. 在干燥的天气里,用塑料梳子梳头,发现越梳头 发越蓬松,同时梳子还能吸引碎纸屑. 前者是因为头 发带_____同_____(填“同”或“异”)种电荷而相互 ____排__斥____;后者是因为带电体有___吸__引__小__物__体____ 的性质.
基础知识限时训练(二)—2020秋人 教版九 年级物 理全一 册习题 课件(共 18张PP T)
基础知识限时训练(二)—2020秋人 教版九 年级物 理全一 册习题 课件(共 18张PP T)

2014版(鲁教版江苏专用)总复习限时规范训练 限时规范训练2-3

2014版(鲁教版江苏专用)总复习限时规范训练 限时规范训练2-3

第3讲地球公转的地理意义(时间:45分钟满分:100分)一、单项选择题(每小题3分,共48分)(2013·南京模拟)读“某日晨昏线图”,图中表示一根完整的晨线或昏线,此时地球公转速度较大,回答1~2题。

1.此日,丙地正午太阳高度为()。

A.70°B.50°C.30°D.10°2.此日,北京的昼长时间大约为()。

A.9.5小时B.10.5小时C.12小时D.16小时解析第1题根据此时地球公转速度较大,说明地球运行到近日点附近,为北半球的冬半年,太阳直射南半球,由于甲位于70°N,可知太阳直射20°S,可以计算出丙地正午太阳高度为30°。

第2题根据上述分析,北半球应该是昼短夜长,甲地以北有极夜现象,北京位于40°N附近,即是丙的位臵,昼长时间大约为9.5小时。

答案 1.C 2.A我国古代人民根据日月运行位置和天气及动植物生长等自然现象,把一年平分为二十四等份,这就是二十四节气。

二十四节气能反映季节的变化,指导农事活动。

读二十四节气分布图(图甲),回答3~4题。

3.在下列各组节气中,北京的昼长时间最接近的是()。

A.清明、雨水B.立冬、立秋C.小雪、大寒D.雨水、处暑4.图乙是北半球晨昏线与纬线的切点变化示意图,图中四点的日期所处的节气正确的是()。

A.①表示大雪B.②表示立春C.③表示秋分D.④表示芒种解析第3题,图中显示小雪与大寒两个节气关于冬至对称,则这两天太阳直射点位臵相同,故北京在这两天昼长最接近。

第4题,依题意,图中③表示切点位于北极圈,则可能是冬至或夏至。

若为夏至,则①为冬至后、②为春分后、④为冬至前节气,结合题中选项分析都不符合;若为冬至,则①为夏至后、②为秋分后、④为夏至前节气,结合选项分析,唯有④表示芒种合适。

答案 3.C 4.D(2013·江苏省泰州市学情调研)读地球公转示意图,完成5~6题。

限时训练(二)识记并正确书写现代常用规范汉字

限时训练(二)识记并正确书写现代常用规范汉字

限时训练(二)识记并正确书写现代常用规范汉字1、下列各句中,没有错别字的一项是()A.面对美国次贷危机蔓延引发全球的金融风暴,我们的企业表现出强烈的忧患意识,政府千方百计落实各项扶持政策,大家团结一心,共度时艰。

B.在印度,水和修行关联密切,在酷热难当的季节,即便你有深厚的定力,心绪恐怕也会被天气扰乱,只有凉凉的河水或井水才能让人安心修练。

C.现代医学研究发现,过量摄入食醋会有碍钙的代谢,使骨质疏松,而胃溃疡和胃酸过多的人,食醋过多会使征状加重,至于骨伤患者更不宜多食。

D.影片不是通过影像以及对时间跨度极大的真实事件的编篡来再现主人公的一生,而是截取了格瓦拉生命中的一个片段来讲述为梦想而前行的故事。

【答案】A【答题指要】B修炼,C症状,D编纂2、下列句子中,只有一个错别字的一项是()A.吉卜赛人操起各种乐器,大吹大擂地走遍了全村,暄闹之声振耳欲聋。

B.人是什么?爱因斯坦用非常明确的语言回答了这个万古衡新的问题。

C.一朵水莲花在凉风中表现着婀娜的姣羞,诗人借此形容这位日本女郎温柔的缱倦。

D.如果干任何事都易如拾介,那就不会有"人间万事出坚辛"。

【答案】B【答题指要】A暄-喧,振-震;B衡-恒;C姣-娇,倦-绻;D介—芥,坚—艰。

3、下列各句中没有错别字且注音全对的一项是()A.《论lún语》中有一段中国人很熟悉的话:“吾十有五而志于学,三十尔立,四十而不惑,五十而知天命,六十而耳顺,七十而从心欲,不愈矩(jǔ)。

”B.怀着激动心情的代表们来到了向往已久的2008年北京奥运会主体育场“鸟巢cáo”。

有的用数码像机,有的用摄像机,有的用手机,大家纷纷与“鸟巢”合影留念。

C.语言随着时代的变迁,形成较大的古今差异,给我们带来了阅读的困难。

但只要潜心其中,由流溯源,就一定能觅得学习文言文的津梁,汲(jí)取古代经典的智慧。

D.人们在记录历史、追踪历史时,往往会浮现出许多联想,引发出许多感慨(kǎi),其中有英雄的喟叹(kuìtān),有智者的思索,也有文人骚(sāo)客的歌吟。

限时训练(2)圆周运动测试题2(3.15)

限时训练(2)圆周运动测试题2(3.15)

2014-2015年广东肇庆中学高一下学期圆周运动限时训练(二)03.15命题人:张军红 审题人:李芳(50分钟完成,满分100分)班级 学号 姓名 成绩 一.单选题.(本题共4小题,共16.每小题给出的四个选项,只有一个选项正确.) 1.下面关于匀速圆周运动的说法正确的是( )A .匀速圆周运动是一种平衡状态B .匀速圆周运动是一种匀速运动C .匀速圆周运动是一种速度和加速度都不断改变的运动D .匀速圆周运动是一种匀变速运动2.用材料和粗细相同、长短不同的两段绳子,各栓一个质量相同的小球在光滑水平面上做匀速圆周运动,那么( )A .两个球以相同的线速度运动时,长绳易断B .两个球以相同的角速度运动时,长绳易断C .两个球以相同的周期运动时,短绳易断D .无论如何,短绳易断3.小球m 用长为L 的悬线固定在O 点,在O 点正下方L/2处有一个光滑钉子C ,如图所示,今把小球拉到悬线成水平后无初速度地释放,当悬线成竖直状态且与钉子相碰时 A.小球的速度突然增大 B.小球的角速度突然减小 C.小球的向心加速度突然减小 D.悬线的拉力突然增大4.如图所示,有一质量为M 的大圆环,半径为R ,被一轻杆固定后悬挂在O 点,有两个质量为m 的小环(可视为质点),同时从大环两侧的对称位置由静止滑下。

两小环同时滑到大环底部时,速度都为v ,则此时大环对轻杆的拉力大小为( )A .(2m +2M )gB .Mg -2mv 2/RC .2m (g +v 2/R )+MgD .2m (v 2/R -g )+Mg二.双选题.(本题共5小题,共30分.在每小题给出的四个选项中,只有两个选项正确.全部选对的得6分,选不全的得3分,有选错或不答的得0分.)5.关于匀速圆周运动的向心力,下列说法正确的是( )A .向心力是指向圆心方向的合力,是根据力的作用效果命名的B .向心力可以是多个力的合力,也可以是其中一个力或一个力的分力C .对稳定的圆周运动,向心力是一个恒力D .向心力的效果是改变质点的线速度大小6.如图所示,从A 、B 两物体做匀速圆周运动时的向心加速度随半径变化的关系图线中可以看出( )A 、A 物体运动时,其线速度的大小不变B 、A 物体运动时,其角速度不变C 、B 物体运动时,其角速度不变D 、B 物体运动时,其线速度随r 的增大而减小7.如图所示,固定的锥形漏斗内壁是光滑的,内壁上有两个质量相等的小球A 和B ,在各自不同的水平面做匀速圆周运动,以下说法正确的是( )A. V A >V BB. ωA >ωBC. a A =a BD.压力N A >N B8.铁路在弯道处的内外轨道高低是不同的,已知内外轨道平面与水平面倾角为θ(如图),弯道处的圆弧半径为R ,若质量为m 的火车转弯时速度小于θtan Rg ,则( ) A.内轨对内侧车轮轮缘有挤压; B.外轨对外侧车轮轮缘有挤压;C.这时铁轨对火车的支持力等于mg/cosθ;D.这时铁轨对火车的支持力小于mg/cosθ.9.如图所示,质量分别为m 1、m 2的小球A 、B 可以在光滑的水平杆上滑动,两球之间用一根水平细线相连,m 1=2m 2.当装置以角速度ω绕中心轴线匀速转动,达到平衡时,两球离轴的距离保持不变,则有( )A.两球的向心力大小相等B. 两球的线速度大小相等C.两球的向心加速度大小相等D. 212r r =B v A三、计算题(共54分)10.用长为L 的细绳栓住一个质量为m 的小球,如图所示,当小球在水平面内做匀速圆周运动时,细绳与竖直方向成θ角,求: (1)小球做匀速圆周运动的周期 (2)细绳对小球的拉力。

选择题限时训练(二)

选择题限时训练(二)
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高二选修6模块4限时训练2

高二选修6模块4限时训练2

高二年级选修6module4限时训练(2)I.词汇填空在下面这篇文章中填入合适的动词形式。

London was known for its terrible fogs. During my visit, it was terribly foggy. Cars and buses moved slowly, with their lights on and their horns 1 (blow) wildly. When evening fell, the weather got worse. All traffic came to a stop. I had an important meeting 2 (attend) on the other side of the town. I was 3 (be) there at six o'clock. It was impossible to find a taxi, so I decided 4 (walk).Minutes later I was completely 5 (lose). I couldn't even find a street sign 6 (know) where I was. Then I heard a voice 7 (come) in the fog. "Can I help you?" I could hardly see the young woman who had spoken to me, but I was glad 8 (find) someone in the fog. I explained where I wanted to go, and she said she knew exactly how 9 (get) there. I was 10 ( puzzle) for a moment, and then I followed her through the dark streets.11 (lead) me right to the place where I wanted to go the woman stopped . When I asked her how she could see anything in the darkness, she told me that she was made to 12 (blind.) for many years by the disease.II.阅读理解AAn unusual group of musicians from the land of Mozart have just starteda nine-day European tour.The First Viennese Vegetable Orchestra (管弦乐队) from Austriacontains eight musicians, one sound technician and one cook.This mix of people may seem strange until you know the orchestra playinstruments they have carved (雕刻) out of vegetables. At the end of theperformance, the cook cuts up the instruments and makes a tasty vegetablesoup for the audience.It takes the band about half an hour to make a carrot flute (长笛). Otherinstruments include eggplant cymbals (茄子铙钹) and pumpkin (南瓜) drums. Microphones make the vegetable sounds loud enough for the audience to hear."The audience has the possibility of enjoying what they just heard," the band said. "We employ a real cook for the preparation of the soup so it is indeed tasty and very special."1. Which of the following should be the best title of the passage?A. A Special OrchestraB. Uses of VegetablesC. A Special MealD. Eatable Instruments2. From this passage we can infer that ______.A. all the musical instruments are made by a cookB. vegetables can be excellent materials for musical instrumentsC. the shapes and sizes of the vegetables decide what kind of instrument they will be made intoD. the cook makes the band famous and particular3. Which of the following is true according to the passage?A.Music produced by the vegetable instruments is especially sweet.B.The sound produced by the vegetable instruments is weak.C.Pumpkins can be made into very good drums.D.The band stayed in the land of Mozart for nine days.4. The sound technician ______.A. helps to make soundsB. makes the instruments to be used at the concertC. operates the electrical sound equipments to make the music loud enoughD. tests the quality of the musical instruments to be used by the orchestra5. The passage intends to tell us that ______.A.vegetables can be very useful materialsmon things can be made into things of funC.the orchestra has made a great discoveryD.the band is popular with epicures (美食家)BListening to music while you drive can improve yourspeed and ability to get away from accidents, according toAustralian psychologists (心理学家) . But turning your carradio up to full volume could probably make you end up inan accident. The performance of difficult tasks can beaffected if people are in loud noise. The experience ofpulling up at traffic lights alongside cars with loud musicmade some psychologists in the University of Sydney lookinto whether loud music has something to do with driving.The psychologists invited 60 men and women aged between 20 and 28 as subjects and tested them on almost the same driving tasks under three noise conditions: silence, rock music played at a gentle 55 decibels(分贝), and the same music at 85 decibels.For 10 minutes the subjects sat in front of a screen operating a simple machine like a car. They had to track a moving disk on screen, react to traffic signals changing color, and brake(刹车) in response to arrows that appeared without warning.On the tracking task, there was no difference in performance under the three noise conditions. But under both the loud and quiet music conditions, the performers “braked” at a red light about 50 milliseconds sooner than they did when there was no rock music at all. That could mean a reduction in braking distance of a couple of meters actually, the difference between life and death for a pedestrian.When it came to the arrows that appeared across the visual field, the psychologists found that when the music was quiet, people responded faster to objects in their central field of sight by about 50 milliseconds. For the people listening at 85 decibels, response times dropped by a further 50 milliseconds—a whole tenth of second fa ster than those “driving” with no music.“But there’s a trade-off,” the psychologists told the European Congress of Psychology. “They lose the ability to look around the whole situation effectively.” In responding to objects thatsuddenlyappeared, people in 85—decibel rock music were around 100 milliseconds slower than both the other groups. Since some accidents—such as children running into the road—take place without any notice,drivers listening to loud music must be less safe as a result.6. Which of the following is the best way to make driving safer?A. Loud music.B. Quiet music.C. Silence.D. Heavy metal music.7. What does the phrase “pulling up ” in paragraph two mean?A. StoppingB. Giving somebody a liftC. Putting up withD. Driving8. Where did the researchers do the experiment?A. At crossroads.B. At a police traffic stationC. In a crowded streetD. Under the same conditions as those of the streets.9. Which of the foll owing didn’t help the performers to “brake” sooner at red lights?A. SilenceB. Loud musicC. Quiet musicD. Rock musicIII.任务型阅读Getting your children to study can be a little like getting them to eat their vegetables.__10_ Make a study time and have it at the same time every day.This will help your kids to learn to schedule their day and will give them a sense of control over how they spend their time.Allow them to study in blocks of time,such as for half an hour with a fiveminute break in the middle.__11_ Ideal(理想的) study times are after dinner or right after school before dinner.Never allow your children to study in front of the television,as that will encourage passive activity.__12__You'll also need to help your kids find the right place to study.After you've set up a good study time for little learners,set up a good place where they can get those creative juices flowing._13__ Make sure there is a table or a desk and a comfortable chair.__14__ This includes helping them out with their homework sometimes and being there for them with the answers to any questions.The input you give your children during study periods will help form a bond and help make studying enjoyable.A.Pick a place where your children can study properly.B.Hold them to the schedule they create for themselves.C.Finally,spend time with your kids when they're studying.D.Keep the atmosphere light and offer lots of encouragement,too.E.Instead,use TV as a treat or a reward when the homework is completed.F.Try to stop this bad habit by offering some sort of reward.G.One of the best ways to form good study habits for your kids is to design a schedule that they keep to. 答题卡:姓名班级I.词汇填空1 2 3 4 56 7 8 9 1011 12II. III.阅读理解任务型阅读1. blowing2. to attend/attended3. to be4. to walk5. lost6. to have known7. coming8. to find9. to get 10. puzzled 11. Leading 12. to have been blind阅读理解1—9 A C C C B B A D A任务型阅读10—14 G B E A C。

2013高考英语二轮(阅读理解)25分钟限时训练(2)及答案

2013高考英语二轮(阅读理解)25分钟限时训练(2)及答案

2013高考英语二轮(阅读理解)25分钟限时训练(2)及答案阅读理解A 篇IS IT TIME TO GET MP3?Your computer has been playing music for years, one CD at a time. Now hundreds of songs can be stored in your PC (personal computer) if they’re in the MP3 format.What is it?MP3 compresses music into small computer friendly files. You access MP3 music several ways : Mus ic can be downloaded from websites that have converted vast music libraries into MP3. Or you can prerecord CDs into your PC and convert songs in minutes into MP3. Once MP3 music is on your PC’s hard drive, you can play it through your computer’s speakers, “burn” it onto blank CDs or exchange MP3 files with friends using E-mail.How much?Software needed to play and convert MP3 music is often free. It comes preinstalled on most new computers or can be downloaded from many websites, including MP3. com. Some MP3 sites are free. Just type “MP3 sites” into any search engine. The popular MP3 players start at around $50and can hold hundreds of songs. A blank CD on which you can record music costs about a dollar. AdvantagesMP3 turns your home PC into a tape recorder. Tiny MP3 players are the size of a card, making it easy to take hundreds of songs with you.DisadvantagesYou may find that music at many sites is limited. And some only allow you to listen rather than download offerings. Others let you d ownload music that then can’t be copied to MP3 players. Anda growing number of new CDs make it impossible to copy songs to a computer.46. How can you get MP3 music?A. By turning your home PC into a tape recorderB. By taking your own music or songs with youC. By copying songs to a PC through the speakers.D. By downloading from websites which have converted music libraries into MP3.47. Which is NOT true to the passage?A. Software needed to play and convert MP3 music is often free of charge.B. MP3 music can be with friends by e-mail.C. MP3 music ca n be downloaded for free at any site.D. A greater number of new CDs make it possible to copy songs to a computer.48.The underlined word “burn” probably means_____.A. fireB. changeC. downloadD. play49. How much will you pay for a MP3 player?A. Free of charge.B. Free downloading.C. At least fifty dollars.D. About a dollar.B篇Toky o: The world’s oldest man, retired Japanese silkworm breeder Yukichi Chuganji, died in his home at the age of 114, on Monday. Family m embers found him dead on his mattress. Born on March 23, 1889, Chuganji worked as a silkworm breeder and bank employee after leaving school.He also served as a community welfare(福利) officer. He had been in god health, talking daily with his family members.Washington: Every American dislikes people who talk on cell phones while driving, even those who do that kind of act. In the State of New Jersey, 84 percent of 968 cell phone owners said in recent telephone survey that they would support a state ban(禁令) on the use of cell phones while driving. However, 42 percent of cell phone owners also said t hey used the devices “very often” or “sometimes” while driving. Although most agree that the banning is good, only 38 percent believed such a ban would be easy to enforce(实施).New York: A woman in the US who was being attacked by a dog said she was saved from further harm when her 13-year-old daughter distracted the dog by screaming “You want a piece of me?” and kicked it repeatedly in the head. Jane Howell said she and her daughter, Elizabeth, were taking a walk around the n eighborhood on Saturday evening when they came across he big dog, unchained.50. The main idea of the second news is _____.A. most Americans don’t like cell phoneB. a ban on the use of cell ph ones has been madeC. few people use cell phones while drivingD. using cell pho nes while driving will be banned because most Americans don’t like it51. The woman in the US ____.A. was not harmed by the dogB. raised the dog, which attacked her laterC. was protected from being seriously hurt by her daughterD. had escaped when her daughter was kicking the dog52. From the news we can infer ____.A. Chuganji was living alone when he diedB. the woman’s 13-year-old daughter was very braveC. cell phones are not g od devicesD. it’s easy to enforce the ban n th e use of cell phones while driving参考答案46-52 DCBC DCB********************************************************结束HIt was an early September day, cool and bright and just right for running, and I was in the first few miles of a 10-mile race over a course (路线) with a few high hills. Still, I felt energetic; despite the hills it was g oing to be a fine run.Just ahead of me was Peggy Mimno, a teacher from Mount Kisco, New York. She too was running easily, moving along at my speed. The pac e(步速) felt comfortable, so 1 decided to stay where I was; why pay attention to pace when she was setting such a nice one? I'd overtake (追上) her later on when she tired.So I ran behind her. The course headed north for five miles, wandered west for a hilly mile,then turned south again along a winding road. The race was getting harder. We had four miles left and already it was beginning to be real work.Peggy overtook a young runner. She seemed to know him, for they exchanged a few cheerful words as she passed him. Their exchange worried me. You don't chat during a race unless you are feeling good, and Peggy plainly was.Still, I was close enough to overtake her if she tired, so I didn't give up hope completely. We were getting nearer to a long punishing hill now and it would be the test. We were a mile from the finish line, so whatever happened on the hill would almost certainly determine who crossed it first.As I moved up the hill, my attention wandered for a few minutes. When I looked up, Peggy was moving away--first five yards, then ten, then more. Finally it was clear that there was no hope of catching her. She beat me soundly.There is an important lesson in that race. Women are thought to be weaker, slower and not nearly as skilled in sport. Yet as Peggy Mimno so clearly showed, the similarities between men and women runners are more important than the differences. I have run with a number of women, andI can say that it is often hard work.1. What did the writer think of the race in the beginning?A. It would be hard work.C. It would be an easy race.C. It would be a test of his strength.D. It would be a good learning experience.答案: B 指导:首先要审清题干,注意题干中的inthebeginning。

高三化学限时训练(2)

高三化学限时训练(2)

高三化学限时训练(2)原子量;C 17 N 14 O 16 Na 23 Mg 24 P 31 Cl 35.5 K 39 Ca 40 Fe56 一、单选题(8×6=48分)题号 1 2 3 4 5 6 7 8答案1.能与人体血液中血红蛋白结合的一种有毒气体是()A.氯气B.氮气C.一氧化碳D.甲烷全部转化成BaSO4沉淀,此时铝元素的主要存2.把Ba(OH)2溶液滴入明矾溶液中,使SO-24在形式是()D.Al3+和Al(OH)3 A.Al3+ B.Al(OH)3C.AlO-23.2003年,IUPAC(国际纯粹与应用化学联合会)推荐原子序数为110的元素的符号为Ds,以纪念该元素的发现地(Darmstadt,德国)。

下列关于Ds的说法不正确...的是()A.Ds原子的电子层数为7B.Ds是超铀元素C.Ds原子的质量数为110D.Ds为金属元素4.下列说法中不正确...的是()A.磷酸的摩尔质量与6.02×1023个磷酸分子的质量在数值上相等B.6.02×1023个氮分子和6.02×1023个氢分子的质量比等于14∶1C.32g氧气所含的原子数目为2×6.02×1023D.常温常压下,0.5×6.02×1023个一氧化碳分子所占体积是11.2L5.常温时,以下4种溶液pH最小的是()A.0.01mol ·L-1醋酸溶液B.0.02mol ·L-1醋酸与0.02mol ·L-1NaOH溶液等体积混合液C.0.03mol ·L-1醋酸与0.01mol ·L-1NaOH溶液等体积混合液D.pH = 2的盐酸与pH = 12的NaOH溶液等体积混合液6.下列离子方程式正确的是()A.澄清的石灰水与稀盐酸反应Ca(OH)2 + 2H+ === Ca2+ + 2H2OB.钠与水的反应Na + 2H2O === Na+ +2OH-+ H2↑C.铜片插入硝酸银溶液中Cu + Ag+ === Cu2+ + AgD.大理石溶于醋酸的反应CaCO3 + 2CH3COOH === Ca2+ + 2CH3COO- +CO2↑+ H2O7.取a g 某物质在氧气中完全燃烧,将其产物跟足量的过氧化钠固体完全反应,反应后固体的质量恰好也增加了a g 。

吉林省长春市十一中2014届高三下学期限时训练(二)地理试题

吉林省长春市十一中2014届高三下学期限时训练(二)地理试题

体验探究合作展示长春市十一高中2013—2014学年度高三下学期地理学科限时训练(二)(限时40分钟完成)第Ⅰ卷(选择题,44分)本卷共11个小题,每小题4分,共44分。

在每小题给出的四个选项中,只有一项是符合题目要求的。

朝鲜中央通讯社2012年12月13日报道,朝鲜于当天7时38分55秒(北京时间6时38分55秒),从西海卫星发射场(39°39′35″N,124°42′21″E)发射了首颗应用卫星“光明星3号”。

结合图1回答1-3题。

1、下列关于图中各地的叙述正确的是A.甲区域比例尺大于乙区域 B.③地方时比②早C.②地与④地的距离为2220km D.飞机从④地飞往③地的最短距离是向西南2、关于图中各点所在区域叙述正确的是A.①-水资源短缺,畜牧业为主 B.②-地势较平坦,旱作农业为主C.③-盛产柑橘等亚热带水果 D.④-太阳能、地热能丰富,畜牧业为主3、下列说法正确的是A.“光明星3号”发射21分05秒后,全球两天正好各占一半B.卫星发射时美国白宫正是上班时间,获得消息后立刻开会研究C.西海卫星发射场位于东八区D.西海卫星发射场比北京日出早1小时,昼长长2小时环北极地区是指北极圈以北的地区,表1示意环北极部分国家的北极地区土地、人口、GDP占全国的比重。

完成4-5题。

表1(人口为2006年数据;GDP为2005年数据)4、环北极国家中,北极地区对本国经济发展作用最大的是A.加拿大 B.丹麦 C.俄罗斯 D.美国5、近年来,环北极国家日益重视北极地区的经济发展,主要得益于A.地理位置重要B.陆地面积扩大C.人口快速增加D.全球气候变暖图2为我国某地区等温线示意图,图中右表为乙地气候资料图,完成6-8题。

图26、图中乙所在的地区是A.松嫩平原 B.辽河平原 C.华北平原 D.黄土高原7、影响图中等温线分布的原因正确的是A. 甲1月冬季风迎风坡气温低,乙是冬季风背风坡气温比甲高B.乙地夏季比丙地气温高主要是受夏季风影响C.甲地7月气温大于18℃D.丙地冬夏等温线走向主要影响因素是地形8、乙地发展农业的区位优势劣势对应不.正确的是A.地形平坦,土壤肥沃----可能有盐碱化问题B.温带季风气候,夏季高温多雨----热量不足C.有河流,灌溉水源充足----易发洪灾D.地广人稀,机械化程度高----劳动力不足图3为我国东南沿海某区域等高线图和地质剖面示意图,读图回答9-11题。

英语限时训练一,二有答案

英语限时训练一,二有答案

英语限时训练一,二有答案英语限时训练一姓名_______ 学号________ 分数_________第二部分:词汇知识运用(共两节,满分40分)( 用时不超过20分钟)第一节:多项选择(共10小题;每小题1分,满分10分)从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

21.My Dad did not the idea that I would go camping with my friends this weekend.He said it was dangerous for girls to live outside.A. depend onB. approve ofC. leave outD. give up22. After the meeting was over, the secretary _____ the new workers to the master’s office.A. aimedB. pointedC. guidedD. imitated23. I was grateful to Anna for being open and giving me the opportunity to explain and ______ the misunderstanding between us.A. handleB. clarifyC. raiseD. develop24.—Hi, I hear you’re going to London this summervacation.—, I was going to, but now I have changed my plan.A. PreviouslyB. RecentlyC. AbsolutelyD. Partly25. At the end of the year 2010, some species of birds didn’t survive the _____ winter in some European countries.A. severeB. seriousC. mildD. extreme26. The only drawback of the voyage was the ______ sea, which made me very seasick.A. calmB. roughC. patientD. tough27.We need to spend more time researching these suggestions so that we can make a(n) choice.A. knownB. talentedC. advise dD. informed28.The sentence doesn’t make any , no matter how you read it.A. contributionB. roomC. senseD. use29. The term paper was due to December 1, but hard as he tried, he was unable to meet the _____ for it.A. challengeB. needC. deadlineD. date30. I like to put everything so that I can find it easily.A. in timeB. in placeC. in allD. in general第二节:完型填空(共20小题;每小题1.5分,满分30分)阅读下面短文,从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

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高一英语限时训练(7)制卷人:黄云霞审核人:鞠海燕2014/3/10第一节:完形填空(共20小题;每小题1分,满分20分)Old friendsThey finish your sentences, they remember the cat that ran away when you were twelve, and they tell you the truth when you’ve had a bad haircut. But most ly, they are always there for you —whether it’s in person or 36 late night phone calls — in good times and 37 . But as the years pass, it becomes increasingly 38 to see each other, to make new memories. 39 , my high school friends and I promised long ago not to let this happen. We promised to have reunions.A few months ago, we met up for a two-day 40 in the American Southwest. We grew up together in Maine and have said for years that we should have a(n) 41 event, yet it’s often put off or 42 due to schedule conflicts. Not this year.The weekend 43 long talks by the pool, wonderful meals, and a hike that brought the entire group to 44 . Not tears of sadness or anger, but an outpouring of emotion over the complete wonderment that we can be this close —twelve years after graduation —with such physical 45 between us. It’s heartbreaking that we can’t spend our days together in the same neighborhood, walking the same streets, reading the same newspaper at the same coffee shop. But that’s 46 . Grown-up life.Most 47 is the group’s a daptability to one another. The time we spend 48 is non-existent. No need to get reacquainted (重新熟悉), we jump back in the saddle (车座) and it’s as comfortable as ever. Old friends — friends with an ever-present 49 of support and sisterhood, friends that know each other innately (天生地) — are hard to come by and yet we remain as 50 today as we were, years ago, giggling in the back row of Mr. McKechnie’s 9th grade math class.Life today, 51 , is no math class. Our world is full of 52 , full of fear. Y et it 53 me — now, more than ever — how important it is that we stay 54 . We may have questions about our future, but we have true faith in our past, and though this 55 of friends has come to a close, we are already drawing up plans for the next one.36. A. at B. through C. in D. above37. A. bad B. convenient C. happy D. lucky38. A. smooth B. unpopular C. difficult D. easy39. A. Fortunately B. Obviously C. Importantly D. Accidentally40. A . party B. meeting C. weekend D. weekday41. A. unusual B. annual C. excited D. important42. A. damaged B. destroyed C. cancelled D. changed43. A. consisted of B. made up C. aimed at D. resulted in44. A. happiness B. excitement C. sadness D. tears45. A. distance B. difference C. contact D. condition46. A. truth B. theory C. life D. fact47. A. amazing B. disappointing C. embarrassing D. confusing48. A. together B. away C. off D. apart49. A. imagination B. sense C. idea D. duty50. A. close B. interested C. relaxed D. regretful51. A. however B. therefore C. besides D. somehow52. A. doubt B. chances C. confidence D. hopes53. A. informs B. reminds C. persuades D. warns54. A. in charge B. in brief C. in person D. in touch55. A. contact B. conversation C. reunion D. party第二节:阅读理解(共15小题;每小题2分,满分30分)请认真阅读下列短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

AWeather is the subject matter of Westerners whenever they meet. Housewives, businessmen, factory workers as well as farmers all talk about the weather. It is everyday news, whether or not conditions change. Many newspapers carry a regular front page news story in addition to the full reports on as inside-page provided by the weather service. Here are several different types of weather reports taken from the western papers.No.1 Regional ForecastNew JerseyToday. Considerably cloudy with showers likely. High: 75-79. Southwesterly winds at 15 to 20 m.p.h.. Precipitation(降水) probability 70 percent. Tonight: Warm and cloudy, rain likely. Low. 55-63. Southwesterly winds at 15 to 20 m.p.h.. Tomorrow: showers and thunderstorms likely. High: 75-79. Wind S to SW at 15 to 20 m.p.h..No.2 Three-Day ForecastWestchester, RocklandFriday: Mostly fine to partly cloudySaturday: Cloud with some showers.Sunday: Mostly fine.Temperatures: Daytime highs will average in the upper 60’s to 70’s while overnight lows will average in the low to mid 50’s during the period.No.3 Weather StoriesBitter cold, intensified by high winds, gripped (控制) the Upper Midwest today, sheets of ice and snow left by the winter’s first major storm on highways all over the area.At least six deaths were blamed on the storm.Hundreds of schools closed all over the Upper Midwest yesterday and thousands of travelers waited out the weather at roadside shelters.Temperatures dropped well blew zero early today from the Northern Plains through the Western Great Lakes under clearing skies. A 25-below-zero reading was forecast.Nearly a foot of snow fell on northern sections of Minnesota, Winsconsin and Michigan. And hardest hit were Duluth, Minn and Superior, Wis, where 12 inches were recorded. Winds went up to 50 miles an hour.56. In a street corner of London, two strangers may begin their talk with ______.A. What are you doing here? Waiting for someone?B. Hi, how are you?C. Didn’t you listen to the weather report last night?D. A nice day, isn’t it?57. The noon temperature of ______ is nearly 70’s at the weekend.A. Duluth, MinnB. Western Great LakesC. New JerseyD. Westchester, Rockland58. It seems that______ has plenty of rain at the present season.A. Western Great LakesB. WinsconsinC. New JerseyD. Westchester, Rockland59. Which of the following is most probable according to No.3?A. Many schools were damaged in the snow storms.B. The Five Great Lakes were covered by heavy snow.C. The temperatures might drop to 50℃.D. The traffic was terribly affected.BOne winter evening, a storekeeper was going to close up his shop. Suddenly he saw Seth, a lazy, good-for-nothing fellow grab a pound of fresh butter and hid it in his hat. No sooner had the storekeeper seen the act than he hit upon exactly the right revenge (报复) . He would punish the thief, and satisfy his own appetite for fun.Seth had his hat on his head, and the butter in his hat. He was anxious to leave. However, the rightful owner of the butter offered him a cup of hot drink, took him by the shoulders and planted him in a seat close to the stove. The grocer stuffed in the stove as many sticks of wood as he could possibly fit inside.Seth already could feel the butter settling down closer to his hair, so he jumped up, declaring that he must go.“Sit down; don’ t be in such a hurry,” replied the grocer, pushing him back into the chair again.Streak after streak of the butter came pouring from under the poor man’s hat. The fun-loving grocer kept on stuffing wood into the stove. Then, as if surprised, he remarked, “You seem to be perspiring (排汗) as if you were warm! Let me put your hat away for you.”“No!” exclaimed poor Seth at last, unable to stand it a moment longer. “No, I must go; let me out.”A greasy (油腻的) waterfall of butter was now pouring down the poor man’s face and neck, soaking(浸泡) into his clothes, and trickling (滴) down his body into his boots. He was bathed in oil from head to toe.Just as his victim darted out the door, the grocer said, “I reckon (估计) the fun I’ve had out of you is worth the money, so I shan’t charge you for that pound of butter in your hat.”60. Why did Seth put the butter in his hat?A. Because he just wanted to play a trick on the grocer.B. Because he had nowhere to put the butter but in the hat.C. Because he wanted to revenge himself on the grocer.D. Beca use he didn’t want to pay for it.61. What is not the action that the grocer took as a revenge?A. The grocer offered Seth a cup of hot drink.B. The grocer overcharged Seth for the butter.C. The grocer forced Seth to take a seat near the stove.D. The gr ocer offered to take off Seth’s hat.62. What is the best title of the passage?A. Great funB. A fun-loving grocerC. The right revengeD. A foolish customerCExpensive and new gloves allow chatterboxes (话匣子) to take the term “handsfree” to a new level—by talking into them as they make a call. The gloves are known as “Talk to the Hand” and cost £1,000 a pair. They fixed a speaker unit into the thumb and a microphone into the little finger that can be connected to any mobile handset using Bluetooth.Artist Sean Miles designed the new gloves that double as a phone in part of his project that shows the possibilities of gadget (小玩意) recycling. He uses outdated gloves and combines them with parts from mobile handsets recycled through O2, which commissioned (承担) the project. Mobile phone users will be able to keep their hands warm while they chat without taking their phones out of their pockets or handbags.Mr. Miles designed two pairs of the new gloves — one in pink and the other in brown and yellow. They will appear in an exhibition this July and visitors will be able to win the gloves. If demand is high, they will then be produced on a larger scale(范围). O2 Recycle, which backed the project, estimates that there are already 70 million unused mobile handsets in the UK. The service pays up to £260 to those who recycle gadgets including phones, handheld consoles (操纵台), MP3 players and digital cameras.Designer Sean Miles hopes his work will get people thinking about recycling. The 41-year-old said, “I hope that my ‘Talk to the Hand’ project will get people to think again about the waste created by not recycling gadgets. If a few more people recycle their gadgets rather than send them to trash, I think this project will have fulfilled its aim.”Bill Eyres, head of O2 Recycle, urges people to recycle their phone responsibly. He said, “There’s a pressing need for all of us to look at outdated handsets, and a ll the gadgets that we move on from or upgrade each year. Whether they are consoles or cameras, we should think of them as a resource that we need to recycle responsibly rather than throw them away.”63. The underlined word “O2” in Paragraph 2 is probably the name of ______.A. an artistB. a companyC. a mobileD. an exhibition64. Consumers can buy the “Talk to the Hand” gloves ______.A. in the exhibitionB. from Mr MilesC. when they are mass-producedD. after they recycle the gadgets65. The purpose of the project is to _______.A. promote the technology of ITB. enable people to talk to their handsC. raise people’s awareness of recyclingD.attract visitors’ attention in the exhibition66. What is the passage mainly about?A. New mobiles which are fashionable.B. Outdated handsets which are upgraded.C. Outdated gadgets which can be used for recycling.D. New gloves which can be used for making phone calls.DLast year, CCTV journalists approached pedestrians (行人) with their cameras, held a microphone to their mouth and asked a simple question, “Are you happy?”The question has caught many interviewees off guard. Even Mo Yan, who just won a Nobel Prize, responded by saying, “I don’t know”.While the question has become a buzz phrase and the Internet plays host to heated discussions, we ask: What exactly is happiness? And how do you measure it?In the 1776 US Declaration of Independence, Thomas J efferson set in writing the people’s unalienable right to “Life, Liberty and the Pursuit of Happiness”. 235 years on, Wen Jiabao told the nation, “Everything we do is aimed at letting people live more happily.” At National People’s Congress, officials agreed that increasing happiness would be a top target for the 12th five-year plan.US psychologist Ed Diener, author of Happiness: Unlocking the Mysteries of Psychological Wealth, describes happiness as “a combination of life satisfaction and having more posi tive than negative emotions” according to US broadcasting network PBS. This may sound straightforward enough, but it still doesn’t explain what determines people’s happiness.Many argue that happiness is elusive and that there is no single source. It also means different things to different people. For some, happiness can be as simple as having enough cash.Researchers believe happiness can be separated into two types: daily experiences of hedonic (享乐的) well-being; and evaluative well-being, the way people think about their lives as a whole. The former refers to the quality of living, whereas the latter is about overall happiness, including life goals and achievements. Happiness can cross both dimensions (范围).Li Jun, a psychologist and mental therapy practi tioner at a Beijing clinic, says, “Happiness can mean both the most basic human satisfaction or the highest level of spiritual pursuit. It’s a simple yet profound topic.”Chen Shangyuan, 21, a junior English major at Nanjing University of Aeronautics and A stronautics, said his idea of happiness always evolves. “At present it relates to how productive I am in a day,” he said. “It might be linked to job security or leisure time after I graduate.”Then there is the question of measuring happiness. Does it depend on how many friends we have, or whether we own the latest smart phone? Is it even quantifiable?Economists are trying to measure happiness in people’s lives. Since 1972, Bhutan’s GDP measurement has been replaced by a Gross National Happiness index. It is calculated according to the peoples’ sense of being well-governed, their relationship with the environment, their satisfaction with economic development, and their sense of national belonging.In 2009, US economist Joseph Stiglitz proposed “to shift (转移) emphasis from measuring economic production to measuring people’s well-being”. But is well-being more easily measured?67. From what Thomas Jefferson and Wen Jiabao mentioned in the passage, we know ________.A. people’s happiness is determined by grea t peopleB. people’s happiness is an important target for the development of a countryC. people in all countries have the right to ask the government for a happy lifeD. people both in China and America are living a happy life68. According to the passage, the writer may most likely agree that ________.A. CCTV journalists are concerned about people’s happiness out of sympathyB. the question has led to heated discussions about who are the happiest people in ChinaC. Bhutan’s new index shows that people there are the happiest in the worldD. it is not easy for us to decide what determines people’s happiness69.What does the underlined word “elusive” in the sixth paragraph mean?A. availableB. easy to getC. hard to describeD. unimaginable70. The best title of the passage is ________.A. Are you happy?B. The Measurement of HappinessC. GDP and HappinessD. The Secret of Happiness高一英语限时训练(7)答案第一节:完形填空BACAC BCADA CADBA AABDC第二部分阅读理解DDCD DBC BCCD BDCA。

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