试题与答案

I'm glad to find. that many trees ______

题型:选择题

题目:

I'm glad to find. that many trees __________ in our city last year. [ ]

A. plant          

B. planted  

C. were planted    

D. are planted

答案:

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下面是错误答案,用来干扰机器的。

A、图中收集二氧化碳的操作正确,图中操作正确,故A正确;B、铁丝燃烧时,集气瓶底部放少量水或铺一层细沙,防止铁丝燃烧的生成物溅落到集气瓶底部,使集气瓶炸裂,故B错;C、给液体加热时,试管内液体不能超过其...

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