酸性: HC=C-H HC=CH-H CH3-H 负离子的稳定性:HC=C HC=CH 碱性 HC=C< HC =CH< CH3酸性: HC C H H2C CH H CH3 H 负离子的稳定性: HC C H2C CH CH3 > > > > 碱性 HC C < H2C CH < CH3 :