A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15463943267508200e4cc0da5473f85c82bf6819dad59image29.png">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15463943268913e8d219ca90647fc8880809f8db94fbbimage30.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1546394326984328ee5c9e69a46d093717b33bcc875aeimage31.png">
D、1