题目

---Is everyone here? ---Not yet.Look,there_______ the rest of our students! A.come          B.comes        C.is coming          D.are coming 答案:A已知集合A=(x,y)|x一2y一l=0},B={(x,y)|ax-by+1=0},其中a,b∈{1,2,3,4,5,6},则A∩B=φ的概率为(  )A.112B.16C.14D.13
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