A、<img width="93" height="42" id="图片 1" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/d90b0d51-c75d-460e-93b9-1919a1e49b0a.png" />
B、<img width="95" height="39" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/e8443108-818a-4a19-8e7a-470ea2434cb6.png" />
C、<img width="93" height="40" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/25f71b72-3a9b-4c71-86ec-83fcdf4bccc8.png" />
D、<img width="94" height="41" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/705e5ebf-1f0f-41a0-bbb4-b13fff8afbf9.png" />
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