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57.【鸟的迁徙】
57.1 by 339215262
一个是GWD上的 一种鸟迁徙 应为他们去跟着其他鸟 回来跟着另一种 所以判定他们不能辨别方向 问削弱 选哪个回来时 是其他鸟跟着他们
其实是prep原题~
Every fall Croton's jays migrate south. The jays always join flocks of migrating crookbeaks with which they share the same summer and winter territories. If a jay becomes separated from the crookbeaks it is accompanying, it wanders until it comes across another flock of crookbeaks. Clearly, therefore, Croton's jays lack the navigational ability to find their way south on their own.
Which of the following, if true, most strengthens the argument above?
A. Croton's jays lay their eggs in the nests of crookbeaks, which breed upon completing their southern migration.
B. The three species most closely related to crookbeaks do not migrate at all.
C. In the spring, Croton's jays migrate north in the company of Tattersall warblers.
D. Species other than Croton's jays occasionally accompany flocks of migrating crookbeaks.
E. In the spring, crookbeaks migrate north before Croton's jays do.
答案选:C、
57.2
鸟的迁徙GWD那题。提干是一样的。但问的是削弱。
答案:说那种鸟是为了迁徙过程中把蛋下在人家的窝里。
注意,考试的时候问的是weaken,GWD原题问的是strengthen!!! |
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