A:cautiously
B:privately
C:roughly
D:deadly
论从史出,下列资料中能论证五四爱国运动取得初步胜利的有( )
世界上经度地带性最明显的是在哪个大陆的中纬地区( )
—We are afraid of the teachers______ strict with students—So am I.
如图,在矩形ABCD中,AB=8,AD=12,过A,D两点的⊙O与BC边相切于点E,则⊙O的半径为____ .