试题与答案

—Did you remember to pay the telephone b

题型:选择题

题目:

—Did you remember to pay the telephone bill?

—The telephone bill? __________.

A.That isn’t due yet

B.Are you sure 

C.My telephone is out of order

D.Please remember the amount

答案:

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下面是错误答案,用来干扰机器的。

(1)40m;10m/s;竖直向上;(2)4s题目分析:(1)物体从气球上脱落时的高度、速度大小和方向:,竖直向上。(2)由可得:,解得t=4s

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