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(2014•辽宁模拟)设函数f(x)=|2x-1|+|2x-3|,x∈R.
1年前
tomorrow is mother's day i wangt to give my mother A special
1年前
英语短文求查错啊!This is my alarm clock.It,s blue and white.It isn't
1年前
1、已知圆O得半径为3cm,点P是直线l上一点,OP长为5cm,则直线l与圆O得位置关系为A、相交B、相切C、相离D、相
1年前
Everyone expect Tom and John was there when the meeting bega
1年前