The universe has more than 100 billion s

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问题 The universe has more than 100 billion separate systems of stars and gas known as _____.A.galleriesB.gangstersC.galaxiesD.garments

选项 A.galleries
B.gangsters
C.galaxies
D.garments

答案 C

解析 galaxy银河系。gallery画廊。gangster歹徒。garment服装。

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