A、<img width="51" height="48" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/57aa41f9-0930-49e6-ba4d-e22e548adc9a.png" />
B、<img width="50" height="47" id="图片 103" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/ed0dae00-b489-402a-8116-601fcadb9a7c.png" />
C、<img width="50" height="47" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/d25c526f-952c-4d46-8d22-5b5d70f220d0.png" />
D、<img width="50" height="47" id="图片 105" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/5c845f47-54fe-42a8-ab31-942c927f7bf8.png" />