Scientists are convinced ______ the posi...

Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.

A．of；at　　　

B．by；in

C．of；on　　　

D．on；at

C 【解析】试题分析：考查固定词组。固定词组be convinced of相信…；have an effect on…对…有影响；句意：科学家们相信微笑对于身体很精神健康都有积极的影响。故C正确。考点：考查固定词组

考点分析：

相关试题推荐

In American there are more households with pets than ______ with children.

A．those

B．these

C．ones

D．that

查看答案

They are said to have developed a new ______ to teaching, which is said to improve classroom teaching greatly.

A．method

B．means

C．way

D．approach

查看答案

The first one ______ will get a beautiful gift.

A．arrived

B．arriving

C．arrives

D．to arrive

查看答案

Children, who grow up in a friendly family, are more ______ to get along well with others.

A．similar

B．probable

C．likely

D．possible

查看答案

______ where to go, he asked a passer-by for help.

A．Having lost his way and didn’t know	B．Losing his way and didn’t know
C．Having lost his way and not knowing	D．Lost his way and didn’t know

查看答案

试题属性