A:间接选举,差额选举
B:间接选举,等额选举
C:直接选举,差额选举
D:直接选举,等额选举
函数y=2-x+1x-1中自变量x的取值范围是( )
Does she often____(play) football on Sunday?
下列各式中,运算正确的是( ).