单项选择题
A.sp³>sp²>sp B.sp²>sp>sp³ C.sp²>sp³>sp D.sp>sp²>sp³
A.N(C2H5)3 B.NH(C2H5)2 C.NH3 D.(C2H5)4N+OH-
A.①>②>③>④ B.④>③>②>① C.②>①>③>④ D.②> ①>④>③