A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15447770436413c0505b0fea34cc296e5c62c6d6b948cimage4.png">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15447770437203872b83bb57945ec80a2ce0ca9bfd266image5.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15447770438057a41c43215844446a697e14ef3477028image6.png">