把下面这句话改为反问句。

老师没想到一个孩子对别人能产生如此大的影响。

小华家的电能表上标有“600revs（kW•h）”的字样，表示接在这个电能表上的用电器，每消耗1kW•h的电能，电能表上的转盘转过600转，她想用电能表测量家中空调的功率，便单独使用空调1min，同时观察到电能表上的转盘转过了10转，则空调的功率为____W．家庭电路如果电流过大，会导致温度升高，造成火灾，电流过大有两个原因，一是____，二是____．

. How can you expect to get everything ______ you never give?

阅读理解
    James is a good student and he has lots of friends，but he also has a problem. Some older boys are bullying(欺负)him at school. James is very unhappy and he doesn't know what to do about it. Here are some suggestions to him and other teenagers in this situation.
    Don't feel worried. It's not your fault(过错)! Being bullied can make you feel very lonely and angry，but you are not alone. Don't feel that you have to hide the problem. You should find a person you can trust，and tell them. It might be your teacher，your parents，or even your friend's parents. After you tell someone，you will get some support and feel some relief(解脱).
    Speaking to an adult might make you nervous，but here are other things you can do. Some people express their feelings more easily on paper. Write a letter to someone or keep a diary. Include all the details(细节)about what the bullies do, as well as when and where the bullying happens. You can use it as proof to show what is going on. And it is a wonderful idea to show your letter or diary to a teacher or another responsible adult. Then the bullies will feel very afraid if their names appear in a letter!
    Also，don't show you are sad and don't try and fight with the bullies. You could get in trouble yourself. Ignore them and just walk away. The bullies will soon stop.

如丙图所示，a是垂直纸面放置的闭合电路的部分导体，请画出能产生感应电流的一种导体运动方向（用箭头表示）．