A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1529375441736e1d4a3e1a0d34862a48c051fb137df69.png" alt="上传图片"><br>
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1529375447865cd03f538688d4ed486b41c8d74f3e628.png" alt="上传图片"><br>
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15293754538299a3b1e76e7424c2c8a8ba097711470ba.png" alt="上传图片"><br>
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1529375459642f385b488ef8146dba04da6cd04f2fe16.png" alt="上传图片"><br>