【单选题】She still remembers Beijing University, ____________she graduated five years ago.
【单选题】下列电离方程式书写正确的是( )
A.
把H 2 SO 4 放入水中:H 2 SO 4 H 2+ +SO 4 2 ﹣
B.
把Ba(OH) 2 放入水中:Ba(OH) 2 Ba 2+ +(OH) 2 ﹣
C.
把NaHSO 4 放入水中:NaHSO 4 Na + +H + +SO 4 2 ﹣
D.
把CaCl 2 放入水中:CaCl 2 Cu 2+ +Cl 2 ﹣
【单选题】She still remembers Beijing University, _____ she graduated five years ago. [ ]
【单选题】下列电离方程式书写正确的是()。
A.
NH 3 •H 2 O=NH 4 + +OH -
C.
NaHCO 3 =Na + +H + +CO 3 2-
D.
KClO 3 =K + +Cl - +3O 2-
【单选题】下列电离方程式书写正确的是( )
A.
Ba(OH) 2 = Ba 2 + + (OH) 2 -
B.
FeCl 3 = Fe 2 + + 3Cl -
C.
K 2 CO 3 = K + + CO 3 2 -
D.
H 2 SO 4 = 2H + + SO 4 2 -
【单选题】下列电离方程式书写正确的是 ( )
A.
Al 2 (SO 4 ) 3可逆 2Al 3 + + 3SO42-
D.
Ca(OH) 2可逆 Ca 2 + + 2OH -
【单选题】She still remembers the things and persons they talked about last year.
【单选题】She still remembers Beijing University ______ she graduated five years ago.
【单选题】下列电离方程式书写正确的是( )
A.
H 2 CO 3 ⇌2H + + CO 3 2-
B.
NaHCO 3 = Na + + H + + CO 3 2-
C.
Fe(OH) 3 = Fe 3+ + 3OH --
D.
KHSO 4 = K + + H + + SO 4 2-