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Only outside the Earth’s atmosphere ______ to attain extremely high velocities.A
Only outside the Earth’s atmosphere ______ to attain extremely high velocities.A
游客
2024-08-08
3
管理
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。
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