单选题：When a large star explodes, the gravity compacts ever piece

题目分类：理工类
题目类型：单选题
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题目内容：

When a large star explodes, the gravity compacts ever piece into __________ A．the creation of new entities
B．an explosion of huge stars
C．the tiniest particle
D．the same amount of mass
E．the existence of black holes
F．a fraction of an inch

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答案解析：

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