下列反应的离子方程式正确的是
A．醋酸铵溶液和盐酸反应 CH3COONH4+H+
CH3COOH+NH4+
B．硫化钠溶液呈碱性 S2－+2H2OH2S+2OH－
C．硫酸铝溶液和小苏打溶液反应 Al3++3HCO3－==3CO2↑+Al(OH)3↓
D．向稀氨水中加入稀盐酸 OH-+H＋
H2O
答案：C
A．醋酸铵为强电解质，应拆为离子：CH3COO—+H+
CH3COOH
B．水解反应一般是分步进行的，并且以第一步为主：S2－+H2O HS－+OH－
C．双水解反应，正确
D．氨水为弱碱，不能拆为离子，不正确
答案为C
| 阅读理解。 | ||||
Films in Grand Movie Theater This week
| ||||
| 1.There will be ______ in Grand Movie Theater this week. | ||||
| A. one Chinese film B. two Chinese films C. three American films D. a lot of foreign films | ||||
| 2. If a man with his child goes to Grand Movie Theater on Sunday, they will pay ______ for the film. | ||||
| A. $12 B. $9 C. $6 D. $5 | ||||
| 3. If you are free on Friday morning, you can see the film in Grand Movie Theater. | ||||
| A. KUNGFU HUSTLE B. A WORLD WTTHOUT THIEVES C. TROY D.HAPPY POTTER（Ⅲ） | ||||
| 4. You can see three films either on ______ or on ______. | ||||
| A. Wednesday; Friday B. Tuesday; Wednesday C. Thursday; Friday D. Saturday; Sunday | ||||
| 5. From the poster, we know ______ is a director and actor in the film. | ||||
| A. Alfonso Cuaron B. Feng Xiaogang C. Wolfgang Peterson D. Zhou Xingchi |
