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【单选题】
一物体静止在光滑水平面上,同时受到两个方向相反的水平拉F1、F2的作用,Fl、F2随位移s变化情况如图所示.则物体的动能将A.
一直变大，位移为20m时最大
B.
一直变小，位移为20m时最小
C.
先变大再变小，位移为10m时最大
D.
先变小再变大，位移为10m时最小
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皮皮学刷刷变学霸
举一反三
【多选题】符号互动论的三个基本假设是
A.
人们根据他们赋予客观事物的意义来决定对其采取的行动
B.
人们所赋予事物的意义是社会互动的结果
C.
人们在应付他所遇到的事务时通过内部解释去运用和修改这些意义
D.
场景本身是行动的一部分，它与行动一样是社会成员通过努力构成的“成果”
【单选题】08-65. Which of the following sentences expresses "probability"?
A.
You must leave immediately.
B.
You must be feeling rather tired.
C.
You must be here by eight o'clock.
D.
You must complete the reading assignm
【单选题】The mother said she would ______ her son washing the dishes if he could finish his assignment before supper.
A.
let down
B.
let alone
C.
let off
D.
let out
【单选题】听力原文：W: Why don't you go to bed, Ted? You look so bad. M: I have to finish this assignment which has to be handed in tomorrow morning. Q: Why is Ted up late? (13)
A.
His mother wants him to do his homework.
B.
He has to finish his homework.
C.
He is too excited to sleep.
D.
He doesn't know it is very late.
【单选题】The foreigh visitors took a lot of pictures when they were at the Great Wall.
A.
复合句
B.
并列句
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