A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1504836586495158088f2850b4872af402bf8b841e6c6image19.png">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15048365865835350adb09677458fac8c3a3778f37203image20.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1504836586678b17d861e2d5d46a5b236ff9c789492f8image21.png">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1504836586793c25fcd2aae854da8b59b515aa0910041image22.png">