A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15075986709787436464f1c144b198ca9a1dc7474651dimage18.png">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1507598671116dd19d01b70a6421bb5e63fc28a7f3422image19.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/150759867119135b23258cc3847dbbaa3567f5597f2daimage20.png">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1507598671331f65c4a87e230431e860462ce5e653beeimage21.png">
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