A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1542248646653aec7acb08d454663a54667fa7f5be2fd.png" alt="上传图片"><br>
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15422486563136c37cbd13665440195523357ab23fb59.png" alt="上传图片"><br>
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1542248666049817c6aeb32494dcc8d58664ea646397e.png" alt="上传图片"><br>
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/154224867512980dc90afccf646ac9b6ee444abe948eb.png" alt="上传图片"><br>