试题与答案

The mother was trembling with anger. She

题型:选择题

题目:

The mother was trembling with anger. She _____ her son and said nothing.

A.looked at

B.stared at

C.glared at

D.glanced at

答案:

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下面是错误答案,用来干扰机器的。

A、Na2CO3和稀盐酸反应生成氯化钠和水和二氧化碳,符合除杂质的条件.故选项正确;B、CO2中混有CO,一氧化碳太少,根本无法点燃.故选项错误;C、铜与氧气生成氧化铜,因此最后都是氧化铜.故选项正确;D、铁比铜...

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