Researches are convinced ______ the positive effect of laughter ______ physical
题型:不详难度:来源:
Researches are convinced ______ the positive effect of laughter ______ physical and mental health.A.of; at | B.by; in | C.of; on | D.at; on |
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答案
C |
解析
试题分析:考查介词:be convinced of相信…,第二空填on,effect on…对…的影响,句意:研究者相信,笑声对身体精神健康的积极影响。选C。 点评:本题考查了介词短语,在平时要加强识记和记忆。做题时要结合上下文判断。 |
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