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1.??
(1)???????????????????????????????46k?2????k?9??3???
(2)??????????????????k?36??23???k?6??3???
2.??
(1)?9??12????200?150??1?(2)??30()30?????157?
(3)?6??30??30?1??????,???()??????(4)30()3060?????????1?78
3.?(1)??...