A、3
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15276477451370a1f019832a047598ea6992804dd51e3image14.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15276477452576e02cac66d554de2a39b821fc63ab3e5image15.png">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/152764774536334e807d7b331449e9530ada2cf7bdcf6image16.png">
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