A、<img width="345" height="20" id="图片 1" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/d10276e6-5d06-4334-ae86-c334f16df5a9.png" />
B、<img width="345" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/5d40597f-8185-414e-9ad6-23afc2c4fd1b.png" />
C、<img width="360" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/3a799e17-63fc-4f9d-8a73-ef56ad9a98ef.png" />
D、<img width="354" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-08-23/6878b780-1358-411b-80d6-a08a4acdeb64.png" />