填空题

Once out of the earth’s gravity, the astronaut is affected by the problem of ______ (weight).

【参考答案】

weightlessness
<上一题 目录 下一题>
热门 试题

问答题
This incident stuck in my mind because it confirmed my growing belief that children are changing.
问答题
It is hard to predict how science is going to turn out, and if it is really good science it is impossible to predict.
相关试题