问题
选择题
一个正方形闭合线圈，在足够大的匀强磁场中运动，能产生感应电流的是：
A．甲图
B．乙图
C．丙图
D．丁图
答案
答案：D
穿过闭合电路的磁通量发生变化，便产生感应电流，D对
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一个正方形闭合线圈，在足够大的匀强磁场中运动，能产生感应电流的是：
A．甲图
B．乙图
C．丙图
D．丁图
答案：D
穿过闭合电路的磁通量发生变化，便产生感应电流，D对
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| Most adults want to return to their childhood, because they believe how happy it is to be a child. But they forget that times have changed a great deal, and they never honestly change places with a child. Think of the years at __1__: the year spent living in __2__ fear of examinations and school reports. Every movement you made was __3__ by some adults. Think of the __4__ when you had to go to bed early, you had to eat __5__ things that were supposed to be good for you. Remember how "gentle" __6__ was given to you with words like"If you don't do what I say, I will…". I'm sure you will __7__ forget! __8__, these are only part of children's trouble. No matter how kind and loving parents may be, children often __9__ from some terrible and illogical fears since they can't understand the world around them. They often have such 10 in the dark or in the dream. 11 can share their fears with other adults while children have to face their fears 12 . But the most 13 part of childhood is the period when you begin to go out of it, the period when you go into 14 . Teenagers start to be 15 their parents and this causes them great unhappiness. There is a complete 16 of selfconfidence during this time. Adolescents pay much attention to their appearance and the 17 they make on others. They feel shy, awkward and clumsy(笨拙的). 18 are strong but hearts are easily broken. Teenagers 19 moments of great happiness or black despair, 20 through this period, adults seem to be more unkind than ever. | ||||
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