题目内容

双分子的简单反应一定是二级反应。

A. 对
B. 错

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具有简单级数的反应是基元反应。

A. 对
B. 错

Australia _________ to have been connected to South America millions of years ago.

A. is believed
B. believes
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D. is believing

The guidebook_________ for those who are going to start a business online in this country. 【2014年6月第16题】

A. is intended
B. to intend
C. intends
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All the members of the club were present when the chairman __________ (elect) last week.