OG-139 求救

爱维的天

139. Which of the following, if true, would be most useful in supporting the conclusions drawn from recent observations about globular clusters?

(A) There is firm evidence that the absolute age of the Milky Way galaxy is between 10 and 17 billion years.

(B) A survey reveals that a galaxy close to the Milky Way galaxy contains globular clusters of ages close to the age of Palomar 12.

(C) A mathematical model proves that small gas clouds move in regular patterns.

(D) Space probes indicate that the stars in the Milky Way galaxy are composed of several different types of gas.

(E) A study of over 1,500 individual stars in the halo of the Milky Way galaxy indicates wide discrepancies in there ages.

OG-139的答案是﹙E﹚，这个答案是可以接受啦!但我觉得﹙A﹚比﹙E﹚更好啊!

﹙E﹚只有说在age上有差异，但﹙A﹚答案中确实的说有10~17 billion的差异。

请牛人赐教

思谦

偶认为A只是说有证据说age在10-17billion之间，这有可能是不能准确估计age,和题目问的它形成的时间长短无关，而E中说有 over 1,500 individual stars 在age上有差异，正好说明它整个形成的时间很长。

不知道说得对不对，请大家指正

wangyu73cn

偶认为A只是说有证据说age在10-17billion之间，这有可能是不能准确估计age

嗯，是啊。我觉得，between 10 and 17 billion years是比较模糊的时间段。例如，星系内所有的天体年龄是12 billion years也可以符合这个时间段的条件。不过，不知这样理解是不是正确。

differentchen

是啊,尤其是E选项特别强调了"wide discrepancies in their ages"