A、<img border="0" width="46" height="46" src="http://admintk.100xuexi.com/UpLoadImage/2016-09-29/3ba71382-0b6b-4573-9a4a-44a567843387.png" />
B、<img border="0" width="46" height="46" src="http://admintk.100xuexi.com/UpLoadImage/2016-09-29/159e30a1-d0fc-49e5-9cd4-5d770091ac8d.png" />
C、<img border="0" width="48" height="48" src="http://admintk.100xuexi.com/UpLoadImage/2016-09-29/dc61b3ba-ca9a-4407-8a97-b12bbaf6e16f.png" />
D、<img border="0" width="51" height="51" src="http://admintk.100xuexi.com/UpLoadImage/2016-09-29/54186d85-2377-47b1-80c1-a242648f20d9.png" />