A、1
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15289536286708c8c15030a804efab21f5af1c1608fb2image31.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/152895362874872bc5873fe804355878af2b4c94f705fimage32.png">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15289536288309463f60c64814a53a06696cffa4907d0image33.png">