It has revealed that the vitamin D __ slowing down the aging process.到底选什么呢?A.plays an important effect inB.plays a key role in C.takes an important part in我觉得B和C意思差不多吧?
问题描述：
It has revealed that the vitamin D __ slowing down the aging process.到底选什么呢?
A.plays an important effect in
B.plays a key role in
C.takes an important part in
我觉得B和C意思差不多吧?
答
B,上面的解释都很对,play a part (in) 是 在……中起作用,参与； play a role in 是在某方面起作用,在……中扮演一个角色,在……中起作用； 而 take part是指参加活动,而不是参与 作用如果要修改的话应该是 A.has (t...