问题
选择题
如图所示使物体A、B带电的实验为
A．摩擦起电 B．传导起电 C．感应起电 D．以上都不对
答案
答案：C
题目分析：当带电的球靠近Ab时，由于静电的感应，会使左端出现负电荷，右端出现正电荷，当把AB分开之后，A就带了负电，B就带了正电，所以本实验为使物体感应起电，所以C正确．
点评：本题是基础的题目，在平时要注意多积累，掌握住使物体带电的方法．
搜题请搜索小程序“爱下问搜题”
如图所示使物体A、B带电的实验为
A．摩擦起电 B．传导起电 C．感应起电 D．以上都不对
答案：C
题目分析：当带电的球靠近Ab时，由于静电的感应，会使左端出现负电荷，右端出现正电荷，当把AB分开之后，A就带了负电，B就带了正电，所以本实验为使物体感应起电，所以C正确．
点评：本题是基础的题目，在平时要注意多积累，掌握住使物体带电的方法．
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| We always want what we cannot have. When we're young, we want to stay out late, have romantic relationships,and be __1__.However,when we're __2__,we want to go back to being young and we __3__ the days when we didn't have to worry about complex love affairs,__4__ pressure,and money problems.Young people believe adulthood __5__ freedom from parents and schoolwork.When they get older,they feel that __6__ is freedom from work pressure and family responsibilities.To __7__ this feeling, people say,"The grass is always __8__ on the other side." As __9__,we like to be adults, but as young adults, we __10__ to be young again. We think about staying out late,__11__ our own money to spend.Suddenly,they see that love can result in __12__ heart s；staying out late makes it hard to get ready for __13__ the next morning.They find out that adult life is not as __14__ as they thought it would be and suddenly,__15__ becomes very scary. Life is __16__.It gives us time to __17__ but also requires us to work.The time will come when we must grow up and we will always look back wishing we __18__ being young a bit longer.That time will not come back.It is normal to want what we cannot have but the _19_ is that to be happy is to appreciate what we have.That is the first step to growing up.__20__ life becomes more complex we will not regret the time we wasted wishing we were adults. | |||
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