试题与答案

单词拼写。 根据句意和汉语及首字母提示,补全下列各句。 1. Words can

题型:填空题

题目:

单词拼写。

根据句意和汉语及首字母提示,补全下列各句。

1. Words cannot____(表达)my feelings.

2. English is a b____of the Germanic family of languages.

3.You need to offer____(具体)evidences to support your idea.

4. They__(取笑)her about her laziness.

5.The prisoner's statement was_____(矛盾)to the one he'd made earlier.

6.____(改变)this sentence into the passive voice.

7. Are you satisfied with my____(翻译)of the poem?

8. She got a paper____(样式)for a dress.

9. My work_____(工作量)is more than forty hours a week.

10. Nowadays lots of people go to the countryside to enjoy their holidays in a c____ with flowers all around.

11. I don't like s_____ food.

12. I am going to travel abroad, so I go to e____ some RMB for dollars in bank.

13. Jeans(牛仔服)are not a ____for the formal party.

14. Don't be upset about it any more, you see, e____ chances are awaiting you ahead.

15. Have you found out the s____ of our basketball match.

答案:

I. convey 2. branch 3. concrete 4. teased 5. contradictory

6. Transform 7. translation 8. pattern 9.load 10. cottage

11. salty 12. exchange 13. appropriate 14.endless 15. sponsor

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题型:问答题

如图所示,一个三角形物块固定在水平桌面上,其光滑斜面的倾角为θ=30°.物体A的质量为mA=0.5㎏,物体B的质量为mB=1.0㎏(A、B均可视为质点),物体A、B并列在斜面上且压着一劲度系数为k=125N/m的轻弹簧,弹簧的下端固定,上端拴在A物体上,物体A、B处于静止状态.(g取10m/s2

(1)求此时弹簧的压缩量是多大?

(2)将物体B迅速移开,物体A将作周期为0.4s的简谐振动,若以沿斜面向上的方向为正方向,请你在所给的坐标系中作出物体A相对平衡位置的位移随时间的变化曲线图,并在图中标明振幅的大小.

(3)将物体B迅速移开,试证明物体A在斜面上作简谐运动.

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