A、<img width="99" height="38" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/4bf318ae-e7ab-4311-96c2-ad7f326be6b9.png" />
B、<img width="105" height="36" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/8542a8ca-5e19-43ac-9951-903649d089e4.png" />
C、<img width="45" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/949f22cd-7d21-4671-89c4-00e83296b9dc.png" />
D、<img width="103" height="56" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/3a81c14c-9d4d-4430-80d4-ce21a336f807.png" />