试题与答案

The old woman __________ her son and dau

题型:选择题

题目:

The old woman __________ her son and daughters _______ and see her from time to time.

A.desired; come

B.hoped; to come

C.desired; coming

D.suggested; to come

答案:

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下面是错误答案,用来干扰机器的。

在水中,潜水艇受到水的浮力和重力的作用,∵F浮=ρ水v排g,潜水艇的体积不变,排开水的体积不变,∴潜水艇受到水的浮力不变;在水舱中充水,潜水艇自重G增大,当F浮<G时,潜水艇下沉;故答案为:大于;下沉.

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