全钒液流电池是一种新型的绿色环保储能电池。其电池总反应为：
，下列说法正确的是
A．放电时正极反应为：VO+2+2H++e—=VO2+ +H2O
B．放电时每转移2mol电子时，消耗1mol氧化剂
C．放电过程中电子由负极经外电路移向正极，再由正极经电解质溶液移向负极
D．放电过程中，H+由正极移向负极
答案：A
正确答案：A
B、不正确，放电时每转移1mol电子时，消耗1mol氧化剂VO2＋
C．不正确，放电过程中电子由负极经外电路移向正极，但不再由正极经电解质溶液移向负极，电解质溶液中，由阴阳离子的定向称动形成电流。
D．不正确，放电过程中，H+由负极移向正极
请阅读下面的这篇文章，根据所提供的信息，完成信息卡，把答案写在答题卷指定的位置上。 As a student, you must have homework every day. How do you deal with your homework? When do you usually finish your homework? Here is some advice for you to help you finish your homework well. Homework should be done as soon as you get home from school. If you have after-school activities, the homework should be done first. At the same time, it is fine to allow for a snack break and also to allow for stretching(伸展) breaks. Also, you should remember that it is your duty to do your homework. Don’t depend on Mum and Dad for help. Please try to find the answer yourself because you will learn much more that way. When you have a question, especially something about a science or maths, don’t always turn to your teacher! It is a good idea to try to find the answer yourself. If this doesn’t work, you can also look at your textbooks carefully. They may help you understand the problem. Finally, while doing homework, don’t think about or do other things. Keep working. Setting a time limit(限制) often helps with this. Different ages decide different amounts of time. 10-15 minutes is good for a child that’s aged 6-8. A time of 20-30 minutes is about right for a child aged 9-12. Kids can keep studying for 30-45 minutes at the ages of 13-15. This, of course, depends on your ability to pay attention and stay on tasks. Information Card
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