关于电的文章素材-关于用电的600字作文

Electricity is the flow of electrical power or charge. It is a secondary energy source which means that we get it from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources. The energy sources we use to make electricity can be renewable or non-renewable, but electricity itself is neither renewable or non-renewable.

Electricity is a basic part of nature and it is one of our most widely used forms of energy. Many cities and towns were built alongside waterfalls (a primary source of mechanical energy) that turned water wheels to perform work. Before electricity generation began over 100 years ago, houses were lit with kerosene lamps, food was cooled in iceboxes, and rooms were warmed by wood-burning or coal-burning stoves. Beginning with Benjamin Franklin's experiment with a kite one stormy night in Philadelphia, the principles of electricity gradually became understood. Thomas Edison helped change everyone's life -- he perfected his invention -- the electric light bulb. Prior to 1879, direct current (DC) electricity had been used in arc lights for outdoor lighting. In the late-1800s, Nikola Tesla pioneered the generation, transmission, and use of alternating current (AC) electricity, which can be transmitted over much greater distances than direct current. Tesla's inventions used electricity to bring indoor lighting to our homes and to power industrial machines.

Despite its great importance in our daily lives, most of us rarely stop to think what life would be like without electricity. Yet like air and water, we tend to take electricity for granted. Everyday, we use electricity to do many jobs for us -- from lighting and heating/cooling our homes, to powering our televisions and computers. Electricity is a controllable and convenient form of energy used in the applications of heat, light and power.

可以自己是适量删去一些

主机,是电脑这一家子的大总管,相当于人的大脑,几乎所有的文件资料和信息都由它掌管,您要电脑完成的工作也都由它主要负责,它还要给其他的家庭成员分配工作,其他的家庭成员因此都叫外围设备。主机具体如何工作,我们在后面还要详细介绍。

显示器,它的任务是将大总管的所思所想展示给大家看,因此是个主要的输出设备,它由一根视频电缆与主机的显示卡相连。

以前,大家多用14英寸(屏幕对角线的长度,1英寸=2.56cm)的球面显示器,但现在15英寸平面直角的显示器已逐渐流行起来了,这种显示器的屏幕几乎在一个平面上,不象以前的显示器那样中间凸起,画面效果有了很大的提高。

键盘,它的功能跟显示器相反,负责对大总管的"输入"用户对大总管的工作要求。用户的指令必须通过它才能告诉大总管。通过它,大总管才知道要做什么。

鼠标,这些年随着Windows图形操作界面流行起来,基本上不再用键盘输入命令,只要通过操作鼠标的左键或右键就能告诉大总管要做什么。别看它很小,却给电脑使用者增添了很大的方便。

音箱,专属于多媒体电脑家族,现在,有声有画的多媒体电脑家族越来越壮大,吸引了很多电脑爱好者,大总管的声音通过声卡告诉音箱,再由它传达出来,现在多媒体电脑的音响效果越来越接近于家庭影院的水准了。

打印机,虽然不属于电脑家庭,但跟它们关系很紧密。与显示器一样,打印机也是一种常用的输出设备,通过一根并口电缆与主机后面的并行口相连。打印机有三种类型:针式打印机、喷墨打印机和激光打印机,其性能是逐级递增的

电在我们的生活中是不可缺少的,它可以让电灯发出亮光,让电扇转动起来,让电视机放出好看的画面,让空调工作,给我们制冷或者制热,让气温变得那么舒适可人,让电脑运作,查阅无数的资料,了解无穷的知识……

在我们中国,由于经济建设的持续发展,用电量越来越大,所以电就成了紧缺的物资,越来越紧张,我们这里,去年就常常拉闸限电。特别是大热天,日常生活中最需要电的时候,却常常拉电,而且一拉就是半天以上,害得我们叫苦连天。可是,没有用,电还是给照常拉掉。所以,我要奉劝那一些还不懂得珍惜用电的人,你们一定不要再像以前那样浪费电了。春天秋天还要开到空调,夏天空调打到十来度,宁愿晚上睡觉盖棉被……电灯开着睡觉,通宵不灭,还会振振有词地说:“我会付钱。”请问,有钱就能够买到一切吗?有钱能够买到电吗?

虽然,现在我们祖国发电已经有水力发电,火力发电,还有风力发电,原子能发电……可是,还是不能够满足广大人民的需要,所以我们不能够随心所欲地用电,必须节约用电。要怎样才能够节约用电呢?那非常简单,请从我们每一个人做起。如果每一个人一个月节约一度电,那么全国人民一个月就可以节约12亿多度电。1 度电别看它少,它可以炼钢40千克,灌溉农田1 个小时,还可以让40支光的电灯亮上一天多。然而,我们夏天开空调,一下子就会用去4到5 度电,那么你改用电扇它所用的电比空调的1/8还不到。朋友,你说我们不论是为国,还是为家都应该节约用电吧!让节约下来的电用到更多更应该用电的地方去,做更多更需要做的事情吧!

总而言之,我们要节约用电,从身边的一些小事做起吧!