求助。。。

timdaniel · 发表于 2011-11-11 08:17:08

Q28: PP77.

Like any star of similar mass would do, once the Sun has exhausted the hydrogen in its store, it expands into a red giant, eventually ejecting its outer envelope of gases to become a white dwarf.

A.Like any star of similar mass would do, once the Sun has exhausted the hydrogen in its store, it expands into a red giant, eventually ejecting

B.Like any star of similar mass, once the hydrogen in the Sun’s core is exhausted, then it expands into a red giant and eventually ejects

C.As in the case of any star of similar mass, once the hydrogen in the Sun’s core is exhausted, it will expand into a red giant, and eventually ejecting

D.As any star of similar mass would, once the hydrogen in the Sun’s core is exhausted it will expand into a red giant and will eventually eject

E.As would be the case with any star of similar mass, once the Sun exhausts the hydrogen in its core, it will expand into a red giant and eventually eject

答案是E，不是很理解题目。。

timdaniel · 发表于 2011-11-26 11:00:26

自己顶顶

求助。。。

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