once out of the earth's gravity,the astronaut is ____by the problem of weightlessness.填什么?
问题描述：
once out of the earth's gravity,the astronaut is ____by the problem of weightlessness.填什么?
答
is affected by 受...影响
affect, 动词,一般指 影响的过程.
effect, 名词,也可以是动词.但一般情况下作名词, 指已经知道的影响.此处“被失重的问题影响”