____
已知fx=2-x,x≤0x2-6x+2,x>0,则关于x的不等式f3-x2<f2x的解集为( )
hamburger 蛋糕
——_________do you write a letter to your father?——I seldom or never do that now. Instead, I call or e-mail him almost every day.
巴西储量大、质地优良、产量和出口量都居世界前列的矿产是 ( )
8和9
最大公因数是____.
最小公倍数是____.