NA为阿伏伽德罗常数的值。下列说法正确的是
| A．常温下，1 mol·L－1的NH4NO3溶液中含有氮原子的数目为2 NA |
| B．标况下，22.4L氯气通入足量氢氧化钠溶液中充分反应，转移的电子数为NA |
| C．18g D2O和18g H2O中含有的质子数均为10NA |
| D．将100 mL 0.1 mol·L－1的FeCl3溶液滴入沸水中可制得Fe(OH)3胶粒0.01NA |
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 |