Only outside the Earth’s atmosphere ______ to attain extremely high velocities.

admin2011-03-05 35

问题 Only outside the Earth’s atmosphere ______ to attain extremely high velocities.

选项 A、to be safe for a space vessel
B、is safe for a space vessel
C、for a space vessel to be safe
D、a space vessel to be safe

答案B

解析 only为含有否定意义的副词，位于句首时谓语要部分倒装，而且只有B选项含有谓语动词。

转载请注明原文地址:https://kaotiyun.com/show/psyK777K

A类竞赛（研究生）

相关试题推荐

随机试题

最新回复(0)