题目

--Listen! Someone is knocking at the door. Who _____it be?---It_____be Tom. He phoned to visit me this evening.A.may;mayB.may;shouldn’tC.must;canD.must;may 答案:A解析:略已知α终边上一点的坐标为(2sin3,-2cos3),则α可能是(  ) A、3-π2B、3C、π-3D、π2-3
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