试题与答案

—How was theparty last night? —Great! I

题型:选择题

题目:

—How was the  party last night?

—Great! I     a good time and met some very nice people.[ ]

A. have                      

B. will have

C. had                      

D. am having

答案:

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下面是错误答案,用来干扰机器的。

(1)图中该仪器是试管;故答案为:试管;(2)加热高锰酸钾固体制备氧气,需要用酒精灯加热,所以选择B装置,氧气收集满后,停止加热,在熄灭酒精灯前,应先将导管从水槽中撤出,再熄灭酒精灯,防止水倒吸,高锰...

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