A、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/9566bbe9-77c9-41f6-a0ea-f1694ba23985.png" width="180" height="24" />
B、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/70452530-8e80-4e77-bd9f-8b4c6cb12b5c.png" width="183" height="26" />
C、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/553c3ec6-f7b8-48fd-8727-ae597e8d4d16.png" width="86" height="19" />
D、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/fe05254d-0ab8-48c8-b09b-50d664f76a7a.png" width="81" height="18" />