- UID
- 583174
- 在线时间
- 小时
- 注册时间
- 2010-11-16
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
【类似prep题】 by yaoyaochloe (题干意思一致,但它问的是加强) 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.
鸟儿题 削弱 有两个答案 1. J 要产蛋再 C的巢里 2. 可以防御天敌 如果照这样描述 我会选 2. 因为 可以先飞去 等C出现在产蛋呀~ 但飞的过程中 如果没有C 可能就会被天敌吃了 |
|