The space station spins slowly in ________ space to imitate ________ pull of the earth’s gravity.
A.the; / | B./; the | C./; / | D.the; the |
相关知识点
推荐套卷
The space station spins slowly in ________ space to imitate ________ pull of the earth’s gravity.
A.the; / | B./; the | C./; / | D.the; the |