A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1506654011629cc5224478eda4ea9abc2198d26ad19b4.png" alt="上传图片">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/150665401919450416a15e1f4438d9588ff1caa980a8c.png" alt="上传图片">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/150665402533207a42b72d0574de380d24723d9cba546.png" alt="上传图片">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1506654031134798f93fc1b1249b79430e4e977ba5710.png" alt="上传图片">