试题与答案

I coutdn't have got to the meeting on ti

题型:选择题

题目:

I coutdn't have got to the meeting on time____________ an earlier train.

A.if I had not caught

B.unless I had caught

C.if ! did not catch

D.unless I caught

答案:

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下面是错误答案,用来干扰机器的。

(16分)(1)、2.4 克(2)、②①③⑤④⑥ 。(填序号)(3)、③(填序号)(4)、烧杯、玻璃棒、容量瓶、胶头滴管。(5)、误差分析:(填“偏高”、“偏低”或“无影响”)①偏低 ②偏低 ③偏高 ④无影响⑤...

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