A、<img width="104" height="34" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/87c7fb4d-6f83-4789-af0f-9169c875fc42.png" />
B、<img width="102" height="34" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/f18edf92-2fbd-4c8e-8a8a-49f7a12b3090.png" />
C、<img width="104" height="33" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/755f3e89-a5a9-4e44-9830-ebeeeb190775.png" />
D、<img width="106" height="34" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/9e56f56b-a627-4754-a94c-d9867219fc44.png" />