A、8、9、10
B、7、8、9
C、<img width="76" height="42" src="http://admintk.100xuexi.com/UpLoadImage/2018-03-27/5214085d-4a0e-4875-a38e-2831a3d8f0bb.png" />
D、<img width="52" height="42" src="http://admintk.100xuexi.com/UpLoadImage/2018-03-27/51ab46e8-dec6-4092-bfc2-9cdd75bc83ba.png" />
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