A、<img width="305" height="30" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/4c45faf3-5f43-4032-9724-14c35bbabebb.png" />
B、<img width="298" height="43" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/c3c7f6c0-6d38-4f5f-8d74-dca77a813f34.png" />
C、<img width="260" height="38" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/1e7dbef7-d690-409d-a2a7-1e1e1ee634ff.png" />
D、<img width="495" height="40" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/d619fdb8-6f7e-4e59-85b4-10c98bfb294f.png" />