--I have a cold and my head hurts a lot.
--Oh, sorry to hear that. I hope better soon.
A:you feel
B:your feel
C:you to feel
D:you feeling
以下几组材料中.都是绝缘体的是( )
本初子午线是( )
忽略空气阻力,抛出后的小球在空中运动轨迹如图所示,抛出后的小球由于( )