A、<img width="13" height="37" id="对象 45" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/0ac07f5b-4bdb-4c9b-871c-8d160ea9c00a.png" />
B、<img width="20" height="37" id="对象 46" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/fcc131ac-188c-487f-b5b8-3f2f67cc0382.png" />
C、<img width="27" height="37" id="对象 47" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/81209a3c-d552-4009-ab67-414a69540ae4.png" />
D、<img width="25" height="37" id="对象 48" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/2b3d8681-7daf-4881-bcf4-31b64539fdd1.png" />