A:y= ±12x
B:y=±x
C:y=±2x
D:y=± 2x
GIS与地图的最基本差别是( )
方向盘顺时针转动30°.
____转动30°
区分O2、H2、CO2三种气体的最简便的方法是( )
— It’s not good for parents to_________ other people. —I agree with you. Everyone has his own advantages.