【单选题】Many English houses are known only by a name. If you have difficulty in finding such a house, you may try asking the local shopkeepers.
【单选题】下列化学反应中,属于氧化还原反应的是
A.
Na 2 CO 3 +2HCl==2NaCl+H 2 O+CO 2 ↑
B.
AgNO 3 +NaCl=AgCl+NaNO 3
C.
Fe+CuSO 4 ===Cu+FeSO 4
D.
2NaOH+H 2 SO 4 =Na 2 SO 4 +2H 2 O
【简答题】下列化学反应中,属于氧化还原反应的是( )。
【单选题】下列化学反应中,属于氧化还原反应的是
A.
Na 2 CO 3 + CaCl 2 ==CaCO 3 ↓ + 2NaCl
B.
Fe + CuSO 4 ==Cu + FeSO 4
C.
2NaHCO 3 Na 2 CO 3 + CO 2 ↑ + H 2 O
D.
CaO + H 2 O==Ca ( OH ) 2
【判断题】Many English houses are known only by a name. If you have difficulty in finding such a house, you may try asking the local shopkeepers.
【判断题】Many English houses are known only by a name. If you have difficulty in finding such a house, you may try asking the local shopkeepers