我做完形填空题,

题目

我做完形填空题,
是这样：
Other tests have shown that laughter ( ) to be able to reduce the effect of pain on the body.
A.appears B.seems C.Both A and B
appear to do和seem to do可以互换吗?有什麽区别?

答案

选C.都可以
appear to do和seem to do可以互换.
英汉词典对seem 的解释之一是：
seem:appear to be somthing.
这也是词典的解释：
★seem 和 appear 在应用上常无差别,但前者似可导致某种结论,后者仅仅显示某一客观现象：He seems to be sick,for he appears pale.-er