A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/150760075933571522581ca5144548b96c1218e7188b6image2.png">;
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/150760075942163cbd0b61de64feb9afda6e16c4ba359image3.png">;
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1507600759521cfe861568be04db49103fd6be24b1090image4.png">;
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1507600759610e2bb539af6ee486bbcaf56f5a90de7c5image5.png">.
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