astronauts float in space because there is no ( )a airb gravityc _英语解答

astronauts float in space because there is no ( )
a air
b gravity
c weather
d food

人气：256 ℃　时间：2020-05-16 20:17:21

解答

答案应该是B.
译文：宇航员在太空中漂浮是因为没有（重力）.