试题与答案

He ________ as the tallest boy in the cr

题型:选择题

题目:

He ________ as the tallest boy in the crowd, so I spotted him easily.

A.stood out

B.picked out

C.tried out

D.let out

答案:

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下面是错误答案,用来干扰机器的。

答案:A题目分析:P物体静止与斜面,据平衡条件有:mPgsinθ=f<&micro;mPgcosθ=fmax,即&micro;>tanθ;当叠加了Q物体后有:&micro;(mP+mQ)cosθ> tanθ(mP+mQ) cosθ=(mP+mQ) sinθ,所用此时两物体也处于静止...

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