A、<img width="285" height="41" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/e4ac2834-b959-484e-9c88-d176fd892a68.png" />
B、<img width="280" height="46" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/c27234aa-3ba4-424f-8cb1-e9f559672d62.png" />
C、<img width="378" height="37" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/8df97592-66bc-4a75-a3b5-6297fd65bc7b.png" />
D、<img width="411" height="48" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/44dc5249-6b34-480b-9df1-2e58e2f4b473.png" />