A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1607650125651d27023ba0c0c4e8b97a49deef435d78d.png">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16076501314741aee53de07714d48816f121f4b97f21a.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16076501540674454935140d24d089dbfec3e503b9354.png">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/160765016344237706dcc0fd44d9b8646ebb62f78bb6f.png">
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