A:原子半径:Te>Cl>S
B:热稳定性:H2Te>H2S>PH3
C:还原性:Cl﹣>S2﹣>Te2﹣
D:酸性:HClO4>H2SO4>H2TeO4
喜马拉雅山脉是由 ( )
Listen! The boy____(sing/is singing) in his room.
世界上使用最广泛的语言是( )