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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