-
[高一数学名师视频讲堂] 高一数学名师视频讲堂第23讲: 圆与圆的位置关系
高一数学名师视频讲堂第23讲: 圆与圆的位置关系。相离外切相交内切内含 由圆距与两半径度确定 圆距用d表示两圆半径别用r,R表示2014-08-15 编辑:alice
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
2014-08-15 编辑:alice