—Yes, please.
A:some
B:any
C:many
D:a
本文在选材上有什么特点?
设函数f(x)=|2x+1|﹣|x﹣4|.
(1)求不等式f(x)>2的解集;
(2)求函数f(x)的最小值.
—How long have you read this book?—_________________.