题目

--- I want someone to write the composition for me.--- No! As a student, you _________ depend on yourself. A. shall                 B. will                  C. can                        D. may 答案:A   函数y=tan(2x+π4)的一个单调区间是(  )A.(-π4,π4)B.(-π8,3π8)C.(-π2,0)D.(-3π8,π8)
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