已知关于x的方程kx2-4x+4=0有实数根,则k的取值范围是( )。
k≤1
—— It’s been raining for a whole week. I think it’ll get fine soon.
—— We’re getting into the rainy season now.
A.Of course not.
B.It’s hard to say.
C.Yes, it will.
D.It’s possible.
自动数据配置台提供()功能和()功能,此外还提供()功能。