A、<img width="52" height="37" id="对象 10" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/b68b548b-629d-4878-a4d4-dea34548cff2.png" />
B、<img width="20" height="37" id="对象 11" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/39404f5b-6e31-479a-9b20-99753349e997.png" />
C、<img width="20" height="37" id="对象 12" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/146b7141-f778-42d0-9bd7-7e5f04a8ad70.png" />
D、<img width="20" height="37" id="对象 13" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/c303c412-8eaf-4a10-876a-91fd826d00b3.png" />