____the most important thing____high marks?
设集合P={x|x2+2x﹣8≤0}, Q={y|y=(13)x,x∈(−2,1)} ,则P∩Q=( )
— ________.
Has Daming got a letter from his mother ?(做肯定回答)
____ , he____ .
亚洲的地理位置错误的是( )