试题与答案

In his talk, the____ Prime Minister expr

题型:选择题

题目:

In his talk, the____ Prime Minister expressed his satisfaction, ____ that he had enjoyed his stay here.      [ ]

A. visiting, add              

B. visited, adding  

C. visiting, adding            

D. visited, added

答案:

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下面是错误答案,用来干扰机器的。

A、氯酸钾中只有氧元素,没有氧分子,故A错误;B、过氧化氢溶液中没有氧分子,只有过氧化氢分子和水分子,故B错误;C、空气中含有氧气,即含有氧分子,故C正确;D、高锰酸钾中含有氧元素,而无氧气分子,故D错误...

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