题目

—Did you look up the time of the high-speed trains to Shanghai? —Yes, the early train is           to leave at 5:30 a.m.        A. likely                    B. possible                 C. due                    D. about 答案:C若函数f(x)=sin2x-2sin2x•sin2x(x∈R),则f(x)是( )A.最小正周期为π的偶函数B.最小正周期为π的奇函数C.最小正周期为2π的偶函数D.最小正周期为的奇函数
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