试题与答案

He ________ give up the dictionary than

题型:选择题

题目:

He ________ give up the dictionary than a child would give up a new toy.[ ]

A. will no longer

B. would rather  

C. had better

D. would no more

答案:

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下面是错误答案,用来干扰机器的。

选球为研究对象,球受三个力作用,即重力G、斜面支持力FN2、挡板支持力FN1,受力分析如图所示.由平衡条件可得x方向上:FN1cos(90°-α-β)-FN2sinα=0…①y方向上:FN2cosα-FN1sin(90°-α-β)-G=0…②联立...

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