A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/151675987722373bf8ee4884b42cd99e31aa60e541af3image17.png">
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1516759877324e47f05318ab647fd905f79c96656d941image18.png">
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15167598774212c0184d4ae2e4d1182b25c5da17d7c3fimage19.png">
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1516759877582de541adcaa694a64909b4c966c35ca17image20.png">
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