下列化学方程式中，不能用H＋＋OH－＝H2O表示的是( )
| A．2NaOH＋H2SO4＝Na2SO4 ＋2H2O | B．Ba(OH)2＋2HCl＝BaCl2＋2H2O |
| C．Cu(OH)2＋2HNO3＝Cu(NO3)2＋2H2O | D．KOH＋HCl＝KCl＋H2O |
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 |
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 |