已知集合A={-1,0,1,2},B={-2,1,2},则A∩B=[ ]
A.{1}
B.{2}
C.{1,2}
D.{-2,0,1,2}
答案:C
已知偶函数y=f(x)有四个零点,则方程f(x)=0的所有实数根之和为 ______.
I’m sorry that I can’t pass you any salt because there is_________ in the bottle.
A.little
B.few
C.a little
D.a few