把x=2y=-1代入方程2x-3y=a,得
4+3=a,
解得a=7.
下列各句中朗读节奏正确的一项是( )
A.今/子欲以子/之梁国/而吓我邪?
B.我孰与/城北徐公/美?
C.窈窕/淑女,君子/好逑。
D.所谓/伊人,在/水一方。
All over the world the mobile phone has leaped from being an impossible luxury in the early 1980s to most people would now call a necessity.
A.which
B.that
C.what
D.when