下列有关电解质溶液中微粒的物质的量浓度关系正确的是
| A．0.1 mol·L－1的NH4Cl溶液中：c(Cl－)>c(NH4+)>c(OH－)>c(H＋) |
| B．将醋酸钠、盐酸两溶液混合后，溶液呈中性，则混合后的溶液中：c(Na+)>c(Cl－) |
| C．已知Ka(HF)=7.2×10-4，Ka(HCN)=6.2×10-10，等体积等浓度的NaF、NaCN溶液中，前者离子总数小于后者 |
| D．浓度均为0.1 mol·L－1的①(NH4)2CO3 ②(NH4)2SO4 ③(NH4)2Fe(SO4)2溶液中，c(NH4+)的大小顺序为：③>②>① |
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
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 |