已知幂函数f(x)=x(2k﹣1)(3﹣k)(k∈z)是偶函数且在(0,+∞)上为增函数.
(1)求f(x)的解析式.
(2)求x∈[﹣1,1]时,函数g(x)=f(x)﹣mx是单调函数,求m的取值范围.
我们对校园的生物种类进行调查时,首先要确定( )
4对____,1对____,6对____。
Do you have __________ to say about this?
— People are crazy! experts say there is no use eating salt to prevent radiation(辐射), some people still don't believe it.