试题与答案

一定量的镁溶液一定浓度的硝酸的反应中,产生标准状况下的N2O气体11.2L,在所

题型:选择题

题目:

一定量的镁溶液一定浓度的硝酸的反应中,产生标准状况下的N2O气体11.2L,在所得的溶液中加入适量的氢氧化钠溶液,完全反应后过滤出沉淀,经洗涤,蒸干并充分灼烧,最后得到固体物质的质量为(  )

A.80g

B.58g

C.40g

D.20g

答案:

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题型:填空题

根据下列句子及所给单词的首字母,写出各单词的完全形式(每空限填一词)。

1. Of the twelve m_____ in the year, January comes first.

2. Jackie, do remember to wash your hands b_____ the meal!

3. Mary's suitcase was too heavy; Mike c_____ it upstairs for her.

4. I'd like to s_____ the last cake with you; you have half and I'll have half.

5. Mobile phones cost less now; they are much c_____ than they once were.

6. Many people believe that it is a good h_____ to get up early in the morning.

7. Shakespeare was b_____ on April 26, 1564 and died on the same day in 1616.

8. If something happens s_____, it happens quickly and unexpectedly.

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