7.試問 Z 選用下列哪一種鹼最適合? (A)CH3NH2(Kb=4.5✖10-4 ) (B)NH3(Kb=1.8✖10-5 ) (C)NH2OH(Kb=1.1✖10 -8 ) (D)C5H5N(吡啶 pyridine)(Kb=1.5✖10 -9 ) (E)苯胺(Kb=3.5✖10 -10)