如图：一种微型纽扣电池，其电极材料分别为Ag2O和Zn，电解质溶液是KOH溶液。负极的反应式：Zn-2e－+2OH－==ZnO+H2O，该电池总反应式为：Zn+Ag2O==ZnO+2Ag。
根据以上提供的资料，判断下列说法正确的是
A．正极的反应式： Ag2O +2e－+H2O=2Ag+2OH－
B．放电时负极附近溶液的pH不变
C．放电时每消耗6.5gZn，转移电子0.1mol
D．放电时溶液中阴离子向正极极方向移动，阳离子向负极方向移动
答案：A
电池总反应式为：Zn+Ag2O==ZnO+2Ag
负极的反应式：Zn-2e－+2OH－==ZnO+H2O
正极的反应式：Ag2O+2e－+H2O ==2Ag+2OH－
B项：由反应式可知，负极反应消耗OH－，故PH减小；
C项：负极式可知，每消耗6.5gZn，转移电子0.2mol
D项：放电时溶液中阴离子向负极方向移动，阳离子向正极方向移动
| 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 |