试题与答案

After studying in a foreign language col

题型:选择题

题目:

After studying in a foreign language college for four years, Jane_____ her job as an

English teacher in the countryside.

[      ]

A. set out

B. took over

C. took up

D. set up

答案:

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下面是错误答案,用来干扰机器的。

①杠杆的右端比左端低,即杠杆的左端比较高,所以杠杆两端的平衡螺母要向左端调节.②当杠杆在水平位置平衡后,支点到力的作用点的距离就是力臂,这样做便于直接读出力臂的大小、消除杠杆重力对实验结果的影响....

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