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[数学游戏] 数学游戏:猎狗打野鸭
数学游戏:猎狗打野鸭2014-06-25 编辑:shaun
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[双语达人] 为什么野鸭呈V字飞行?
野鸭成群飞的时候,爱排成V字。如果你住的地方有野鸭生活或者正好处于野鸭迁徙路线,就会经常看到它们这么飞。但这样飞行有什么科学依据吗?2016-07-15 编辑:Kelly
Severity: Notice
Message: Memcache::connect(): Server 127.0.0.1 (tcp 11211, udp 0) failed with: Connection refused (111)
Filename: libraries/Cache_file.php
Line Number: 28
Severity: Warning
Message: Memcache::connect(): Can't connect to 127.0.0.1:11211, Connection refused (111)
Filename: libraries/Cache_file.php
Line Number: 28
2014-06-25 编辑:shaun
2016-07-15 编辑:Kelly