A、J=AB,K=<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1526005498386cad499699c734f98ab38c483c90090dcimage10.png">
B、J=AB,K=<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/152600549850323588e284ef74f5abe5037660cfe41d3image11.png">
C、J=<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1526005498637861bb322125c417b834052e083e70cb8image10.png">,K=AB
D、J=<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1526005498811f13d8da616f7489782b57bba3edac19cimage11.png">,K=AB
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