【单选题】【消耗次数:1】
He wished to earn a living through writing but ( ) doing so.
succeeded in
was proud of
despaired of
was pleased with
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【简答题】 What did the poor farmer and his wife do to earn a living?
【单选题】 He cannot ____ a car, for he does not earn much money.
①  obtain
②  afford
③  donate
④  consume
【单选题】 3. She was so pleased that she felt like _______.
①  to find someone to talk
②  to find some to talk to
③  finding someone to talk
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①  tried
②  succeeded
③  managed
④  endeavored
【单选题】 What role does a teacher play in the following activity? While doing a writing task either individually or in groups, the students need to use a particular word they don’t know. So they ask the teacher.
①  Controller
②  Assessor
③  participant
④  Resource-provider.
【单选题】 He has been writing the essay the whole morning and he still ___ .
①  has been
②  does
③  has
④  is
【单选题】 What [填空] he doing last Sunday?
①  is
②  was
③  are
④  were
【单选题】 The bosses give them low wages, because it is expected that you will ( ). If you don’t, the service person can’t earn a living.
①  make up the different
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【单选题】 Little Tom is an orphan(孤儿). _____, he has to make a living by himself.
①  A child as he is
②  Child as he is
③  Child as is he A child though he is
【单选题】 He is writing his stories ___________ Monday___________Friday.
①  both...and
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③  from...to
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【单选题】 7-1. 点沿其轨迹运动时
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③  若at10、ano0,则点作变速曲线运动;
④  若at10、ano0,则点作匀速直线运动。
【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/C5B250D08760036311B4D98FE05A6C76.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>
①  只有当牵连运动为平移时成立;
②  只有当牵连运动为转动时成立;
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①  必处于平衡;
②  大小相等,方向相同;
③  大小相等,方向相反,但不一定平衡;
④  必不平衡。
【单选题】 点作曲线运动时,
①  若始终有v^a,则必有?v?=常量
②  若始终有v^a,则点必作匀速圆周运动
③  不可能存在某瞬时有v//a
④  若某瞬时v= 0,则其加速度a必等于零
【单选题】 图示三个均质圆盘A、B、C的重量均为P,半径均为R,它们的角速度w的大小、转向都相同。A盘绕其质心转动,B盘绕其边缘上O轴转动,C盘在水平面上向右滚动而无滑动。在图示位置时,A、B、C三个圆盘的动量分别用KA、KB、KC表示,则<img src=https://huaweicloudobs.ahjxjy.cn/897D0AE1E382215A7B095EC4A93061BE.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>
①  KA=KB=KC;
②  KA1KB1KC;
③  KA1KB=KC;
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【单选题】 以下四种情况(F1 = F2 = F)的说法,哪一种是正确的
①  力偶(F,F’)与力2F对圆轮的作用是等效的;<img src=https://huaweicloudobs.ahjxjy.cn/C8450E9B543CCDB2C2E4F1D6F0731D50.png title=1.png alt=1.png/>
②  力F1与力F2和力偶M对圆轮的作用是等效的;<img src=https://huaweicloudobs.ahjxjy.cn/45C9A84B759E2AB5D63156894401029B.png title=2.png alt=2.png/>
③  力F1与力F2和力偶M互相平衡;<img src=https://huaweicloudobs.ahjxjy.cn/F4CE064F1D83454D12C8384B16CC6790.png title=3.png alt=3.png/>
④  力F与力偶M互相平衡。<img src=https://huaweicloudobs.ahjxjy.cn/C77F579D092084D78877BED78653D8B2.png title=4.png alt=4.png/>
【单选题】 点作曲线运动时,在其运动过程中的某瞬时
①  可能有?v?10 ,?a?= 0
②  不可能有?v?= 0 ,?a?10
③  可能有?v?= 0 ,?a?= 0
④  不可能有?v?= 0 ,?a?= 0
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①  必然相同;
②  也可能不相同;
③  只有在运动初始条件相同的条件下才会相同;
④  在运动初始条件相同时也可能不相同。
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①  能使系统平衡的h值是唯一的。
②  任意h值都能使系统平衡。
③  无论h取何值,系统均不能平衡。
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①  当vA=vB,且mA=mB时,该两质点的动量必定相等;
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