A、<img width="92" height="41" id="Picture 2" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/d0db2784-d425-4207-ba8f-17f9327aee77.png" />
B、<img width="92" height="38" id="Picture 3" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/a9c28d74-7456-4639-873c-ac61f0b6727a.png" />
C、<img width="95" height="40" id="Picture 4" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/52f74d1f-bd72-4d81-9a97-7b39f1237151.png" />
D、<img width="95" height="35" id="Picture 5" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/7c78a844-d2c8-4ec7-aae8-c7acd07e0573.png" />
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