A、<img width="24" height="44" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/7f93c861-10e8-4f65-9591-7610fec53d74.png" />
B、<img width="24" height="44" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/85f99a0b-da10-40c3-a9b0-f2bd98155559.png" />
C、<img width="33" height="45" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/f9dbba45-2f39-48fb-99bb-3c2c8885f07a.png" />
D、<img width="20" height="42" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/3e7df81d-06c7-4a99-988a-8ba462c99862.png" />