有理数m、n在数轴上的位置如图所示,则下列式子正确的是( )
A:-n<-m
B:n < m
C:n2<m2
D:|n|<|m|
关于家鸽适于空中飞翔特征的描述,错误的是( )
Jane has ______ from school for 2 years. When she ______ the happy time, she always misses her teachers and classmates.
集合A={x|a﹣1<x<2a+1},B={x|0<x<1},若A∩B=∅,求实数a的取值范围.