【单选题】在pH=10.0的氨性缓冲溶液中用EDTA滴定Zn 2+ 至50%处时 ( )
【单选题】在 pH 为 10.0 的氨性缓冲溶液中,用 EDTA 滴定 Zn 2+ 至 50 %时
D.
pZn 与 [NH 3 ] 和 c ( Zn )均有关
【单选题】在 pH=10.0 的氨性缓冲溶液中,以 EDTA 滴定同浓度 Zn2+ 溶液至 50% 处 ( )
【单选题】对味觉的叙述,错误的是 ( )
B.
人舌表面的各个部位对不同味刺激的敏感度差不多
【单选题】在pH=10.0的氨性缓冲溶液中,以EDTA滴定同浓度Zn2+溶液至50%处( )
【单选题】26 I have seldom seen my mother——pleased with my progress as she is now
【单选题】在 pH 为 10.0 的氨性 缓冲 溶液中 , 已知, , , , 。则在此条件下 为 :
【单选题】下列关于味觉感受器的叙述,哪项是错误的?
【单选题】In Para. 3, it is implied that ______.
A.
my grandfather seldom talked his history with his family
B.
my grandfather took part in the World War Two
C.
my father knew more about history
D.
my grandfather talked with us face-to-face