题目

This area experienced ________ heaviest rainfall in ________ month of May. A.不填;a         B.a;the           C.the;the          D.the;a 答案:C 函数y=2sin(-2x)(x∈[0,π])为增函数的区间是 [  ] A.[0,] B.[,] C.[,] D.[,π]
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