“地球村”观念的提出者是()
C
暂无解析
thebossescannotdowithoutprofit,workershaveanedge.
己知万有引力常量为G,地球质量为M,半径为R,则地球表面处重力加速度大小为()
爱情的本质是占有
下列叙述中正确的是()
We_____knowledgefromourfamilies,schools,jobs,andthemassmedia