once out of the earth's gravity,the astronaut is ____by the problem of weightlessness.

问题描述:

once out of the earth's gravity,the astronaut is ____by the problem of weightlessness.
once out of the earth's gravity,the astronaut is ___by the problem of weightlessness.
A. affectedB. effeccted
为什么选A不选B请详解,谢谢.

affect 动词 影响 effect作影响讲是名词,它作动词是生效的意思