A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1545212516187c9c32d8bc39a464cb1aa8476f3b52712.png" alt="上传图片"><br>
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1545212544334647edb6c35d84ccb8139df06b76b31b0.png" alt="上传图片">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1545212561250ab4f38698d9345afae8a69829c0b1f4d.png" alt="上传图片"><br>
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15452125809195491ee3946ff455e93e1698240b3bc94.png" alt="上传图片"><br>