下列离子方程式正确的是( )
A．碳酸氢铵溶液与足量氢氧化钠溶液反应：NH +OH  NH ·H O |
B．Fe(OH)与氢碘酸溶液混合：Fe(OH)+3H Fe +3HO |
C．电解精炼铜的阴极反应是：Cu +2eCu |
D．1 mol·L 的NaAlO溶液和2.5 mol·L的HCl等体积互相均匀混合： |
2AlO
+5HAl(OH)↓+Al+HO
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |