A、N！
B、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/513aa416-5f3c-4172-97e6-9e097a524d03.jpg" width="59" height="42" />
C、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/9fa7ead2-3473-4a98-b95e-27788e606230.jpg" width="71" height="43" />
D、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/92cd8df2-9c8f-4178-ae9c-ba7fb1010b91.jpg" width="59" height="45" />