题目内容

63()

A. taste
B. drink
C. smell
D. feel

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下列属于压缩气体的是()。

A. NH3
B. O2
CO2
D. Cl2

I don't know his address, ______.

A. otherwise I will to him
B. otherwise I would write to him
C. otherwise I had written to him
D. otherwise I would have written to him

下列有关试剂存放说法错误的是( )。

A. 醚类化合物一般存放不能超过一年
B. 腐蚀性试剂宜存放在搪瓷桶中
C. 液体石蜡不需密封保存
D. 烯烃暴露在空气中易生成过氧化物而产生危险

71()

A. mouth
B. tone
C. head
D. tongue

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