问题
选择题
某交流电电源电压的瞬时值表达式为u=6 sinl00πt（V），则下列说法中正确的是（ ）A．用交流电压表测该电源电压时，示数是6V B．用交流电压表测该电源电压时，示数是6 C．用此电源给电磁打点计时器供电时，打点的时间间隔为0.01s D．把标有“6V 3W”的小灯泡接在该电源上时，小灯泡将被烧毁 |
V
答案
答案：A
搜题请搜索小程序“爱下问搜题”
| 某交流电电源电压的瞬时值表达式为u=6sinl00πt（V），则下列说法中正确的是（ ） A．用交流电压表测该电源电压时，示数是6V B．用交流电压表测该电源电压时，示数是6 C．用此电源给电磁打点计时器供电时，打点的时间间隔为0.01s D．把标有“6V 3W”的小灯泡接在该电源上时，小灯泡将被烧毁 |
答案：A
| 完形填空 | ||||
| A group of class friends, highly established in their careers, got together to visit their old university professor.Conversation soon __1__ into complaints about stress in work and life. Offering his guests coffee, the professor went to the __2__ and returned with a large pot of coffee and a couple of __3__-porcelain, plastic, glass, crystal, some __4__ looking, some expensive, some delicate-telling them to __5__ themselves to the coffee. When all the students had a cup of coffee in __6__, the professor said :" If you noticed, all the nice looking expensive cups were taken up, __7__behind the plain and cheap ones.While it is normal for you to __8__only the best for yourselves, that is the __9__ of your problems and stress.Be assured that the cup itself __10__ no quality to the coffee.In most cases, it is just more expensive and in some cases even hides what we drink.__11__ all of you really wanted was coffee, not the cup, but you __12__ went for the best cups...And then you began __13__ each other's cups.Now consider this: Life is the __14__, the jobs, money and position in society are the cups.They are just tools to hold and contain life, and the type of cup we have does not __15__, nor change the quality of life we__16__.Sometimes, by concentrating only on the cup, we__17__to enjoy the coffee God has __18__ for us.God brews the coffee, not the cups… Enjoy the coffee!" The happiest people don't have the best of everything.They just __19__the best of everything. Live simply.Love generously.Care deeply.Speak kindly.Leave the __20__to God. | ||||
|