Man has known that ______. A galaxy is the name of ______.

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问题 Man has known that ______.
A galaxy is the name of ______.

选项 A、a large group Of stars
B、the sun
C、planets like the earth
D、the universe

答案A

解析 本题是对星系(galaxy)的解释,星系是由很多恒星组成。但星系不等于宇宙,也不仅指像地球一样的行星,更不仅指太阳,故B、C、D均错误。
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