下列溶液中,微粒的物质的量浓度关系一定正确的是（ ）
A． 的硫化钾溶液中： |
B．常温下,pH=7的CH3COOH与CH3COONa的混合液中: |
C． 的NH4Cl溶液中： |
D．pH=3的一元酸和pH=11的一元强碱等体积混合： |
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’m sure that your letter will get______ attention. They know you’re waiting for the reply. 
| A．continued | B．immediate | C．careful | D．general |
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |