- UID
- 926641
- 在线时间
- 小时
- 注册时间
- 2013-8-21
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
还有一个
【V1】
有一种jay每年会和另外一种鸟(暂时叫A)一起迁徙到南方。如果有一只jay落单了,他也不会自己飞去南方,而是要等他找到其他A的鸟群,也能一起飞去南方。由此推出,jay自己是路盲。问什么可以削弱这个说法。
狗主答案:选了E:因为jay可以保护A,使A免受到一种hawk的攻击。狗主觉得这个选项不够严谨,但是也找不出别的了。
By cherubellini (ID: 767227)
【V2】
就是觉得这题在哪看过,这是prep上面的题目,有出入。感谢火药沫儿 (ID: 611647)童鞋~(shaw 觉得直接上prep原题好了)
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.
|
|