单项选择题
A.漂心;后 B.浮心;前 C.漂心;前 D.船中;后
A.45 B.52 C.60 D.65
A.9.3 B.12.6 C.15.7 D.20.2
A.1254,1968 B.1022,2038 C.910,2275 D.810,2175
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