A:not think; interesting
B:think; not interesting
C:don't think; interesting
D:think; isn't interesting
已知f(x)=(3a-1)x+4a,(x<1)logax,(x≥1)是-∞,+∞上的减函数,那么a的取值范围是( )
How was your _____?
隋朝以来,历朝统治者都沿袭使用科举制度,其根本原因是科举制( )
翻译横线上的单词:____
I have a blue ruler.