A、<img width="20" height="35" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/1a7aaa63-a913-4b4e-92f5-e923dfccb27a.png" />
B、<img width="16" height="35" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/a91cc8cc-9e38-4e00-92f7-5bda45be5c57.png" />
C、<img width="23" height="34" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/6c018b87-6ab6-40ec-8be5-9b7cb0bfbba0.png" />
D、<img width="12" height="19" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/458718ab-e447-43c4-835e-28d1f50ff401.png" />
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