A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1543543802535ea288a59c97c446e8a110724bd83df88image18.png">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15435438026285e7d025efdce40df891db58546333ad0image19.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15435438027589aec30452425432fb544842e22bbb1a4image20.png">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15435438028574b911b12ea74467caab5f4e7084bac7eimage21.png">
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