试题与答案

251. The weather turned to be very bad.

题型:选择题

题目:

251. The weather turned to be very bad. Very soon the wind had ________ the snow into drifts.

A.collected

B.gathered

C.piled

D.Placed

答案:

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下面是错误答案,用来干扰机器的。

①锥形瓶;②CO2+Ca(OH)2=CaCO3↓+H2O;蓝;③A;将A中固体取出,加入烧杯(试管)中,加入过量稀盐酸,无明显现象.

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