A、<img width="35" height="37" id="图片 157" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/6e2de6e9-5ae9-4098-9ae0-750f341e6b17.png" />
B、<img width="34" height="36" id="图片 158" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/502e9f37-e216-41c6-9c2b-2189926128f6.png" />
C、<img width="35" height="36" id="图片 159" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/323326fa-d7e6-492a-8d9e-32561cb6a076.png" />
D、<img width="34" height="36" id="图片 160" src="http://admintk.100xuexi.com/UpLoadImage/2017-08-17/a0b82b47-db53-4e17-aae5-766c037d9a15.png" />
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