【单选题】配合反应 [FeF 6 ] 3- + 6 CN - = [Fe(CN) 6 ] 2+ + 6 F - 的 K 稳 [FeF 6 ] 3- = 2×10 14 , K 稳 [Fe(CN) 6 ] 2+ = 1×10 42 ,在标准状态下,该反应进行的方向是( )
【单选题】When the Witch began to speak, what did she call Cabby?
【单选题】B超检查子宫内可探及妊娠环的最早孕周大约为
【单选题】下列配合反应向右进行的是( )。
A.
[Ag(CN) 2 ] - +2NH 3 ====[Ag(NH 3 ) 2 ] + +2CN -
B.
[FeF 6 ] 3- +6SCN - ====[Fe(SCN) 6 ] 3- +6F -
C.
[Cu(NH 3 ) 4 ] 2+ +Zn 2+ ====[Zn(NH 3 ) 4 ] 2+ +Cu 2+
D.
[HgCl 4 ] 2- +4I - ====[HgI 4 ] 2- +4Cl -
【单选题】The old woman tried to look calm at the sad news, but the moment she began to speak, she __ ____ herself.
【判断题】She began to speak very fast at the meeting at ten o’ clock.