A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1517447448236fb9e97894cbf450999fe1c41db8a523e.png" alt="上传图片">

B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1517447453068958d06b7bf3d4be180d0fb31db413d86.png" alt="上传图片">

C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1517447458574c5733e4d7835458087727fed4b0dcdcf.png" alt="上传图片">

D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1517447464389005713e915c847e5bb482a06f105f026.png" alt="上传图片">