(12分)下列物质:①H2②HF ③H2O2 ④KF ⑤NH4Cl ⑥C2H2⑦N2H4+⑧BF3⑨H2O ⑩N2(填序号)(1)只含非极性键的是___________________ (2)只含极性键的极性分子是_____________(3)既有极性键又有非极性键的是_________(4)只有σ键的是_______________________(5)既有σ键又有π键的是_______________ (6)含有配位键的是_____________________