A:1
B:2
C:3
D:4
They found __________ impossible to finish so much work in such a short time.
为了表示n个点与相应直线在整体上的接近程度,我们常用( )表示
Su Bingtian broke the record. He runs ______ than anyone else in Asia.
(2015·四川)集合A={x|(x+1)(x-2)<0},集合B={x|1<x<3},则A∪B=( )