Migratory birds fly in formation to______. Why do echelon leaders change sometimes?

admin2009-06-24 69

问题 Migratory birds fly in formation to______.
Why do echelon leaders change sometimes?

选项 A、It can help optimize orientation.
B、Birds can better avoid collision.
C、The reason is still unclear.
D、Birds can’t determine one leader.

答案C

解析

转载请注明原文地址:https://kaotiyun.com/show/LbTd777K

公共英语五级笔试

相关试题推荐

随机试题

最新回复(0)