【導(dǎo)讀】來(lái)看一下渦流式全自動(dòng)洗衣機(jī)的構(gòu)造。這種洗衣機(jī)有各種各樣的型號(hào)，其基本構(gòu)造如圖。洗衣機(jī)之所以能兼具洗條和脫水的功能，是因?yàn)樗幸粋€(gè)雙層水槽。在積滿水進(jìn)行“洗條”。和“漂洗”時(shí)，振動(dòng)機(jī)旋轉(zhuǎn)，產(chǎn)生水流。用力使衣服貼近內(nèi)層。由于水和洗條劑會(huì)從內(nèi)槽的空洞向外甩出，因此能快速?gòu)囊路写┩福眠@種沖擊力去除污后。這種機(jī)器的另一個(gè)好處是由于在水中衣物不會(huì)纏繞，因此不必?fù)?dān)心。衣物扭曲,變形或壞掉。也許很多人認(rèn)為洗衣機(jī)中的水是在以同樣方式旋轉(zhuǎn)。它具有使衣服不易纏繞，并能均勻清洗。是時(shí)的沖力將污后祛除。式脫水機(jī)出現(xiàn)為止。雖然脫水時(shí)需要將衣物取出更換地方，目前科學(xué)家正在想方設(shè)法減少洗衣時(shí)的用水量。通過(guò)汽熱化將食品的熱量帶走，從而使它。在從液體轉(zhuǎn)變?yōu)闅怏w的同時(shí)，發(fā)生帶走汽化熱的交換作用。目前許多公司正在進(jìn)一步開(kāi)展“無(wú)。波導(dǎo)管送入內(nèi)部。位于微波爐正中央的是轉(zhuǎn)盤(pán)。是否注意到在用微波爐加熱時(shí)，轉(zhuǎn)盤(pán)總是會(huì)不停的旋轉(zhuǎn)？

　　

【正文】 ping outside. In the middle of the microwave oven is the turntable. Do you notice that when you heat something in a microwave oven, the turntable is always turning? When the waveguide tube we talked about before injects microwaves into the inside of a microwave oven, there are always some areas that get hit with a lot of waves and some areas that don’t. If food was warmed up like that, there would be parts that were hot and parts that were cold, so the food wouldn’t taste too good. How do you get the microwaves to hit all parts of the food evenly? Scientists mulled over this question for a very long time and realized that moving the food was a lot easier than trying to make the microwaves reach every corner of the oven evenly. That’s why scientists started using turntables to spin the food inside microwave ovens. Have you ever seen a snow crystal? Sometimes it’s possible to see them for a short moment when snow lands on your hand, but most of the time it melts before you get to see the beautiful hexagonshaped (six said) crystals. Crystals are made up of particles that are arranged in a regular its crystal shape. Do you know that there are three states for most objects: solid, liquid and gas? Most things only e in these three forms. However, some material can remain in a state that is somewhat between a solid and a liquid, In this state, the object is a liquid but still maintains the regular crystal like arrangement. The existence of this state has been known for a very long time. In fact, there was a research article titled “the flowing crystal “ that was published in 1889, over 100 years ago. It took many, many years of research and development to get liquidcrystal display TVs to the point that they are at now. If you put a nail in the middle of two mags, the ends of the nail try to point towards each mag. Similarly, crystals do not have a round shape but have a long narrow shape and when electricity is passed through a crystal, it tries to align itself in the direction of the electrical flow. In a Liquid crystal TV, many small partments are left between two pieces of glass. Each of these Compartments holds liquid crystals that are colored red, blue or green. Even if light is shined on the back of the screen, the screen remains black because the liquid crystals are not active and block any light from passing through it. However, when electricity passes through a blue partment, the liquid crystal in that partment bee active and allowed light through. That’s how a screen bees blue. The way different colors are made by bining the three primary colors of light (red, blue and green) is the same as the cathode ray tube TV, but in this case, the shutters of the liquid crystals block or let light pass and that’s how different colors are made. The space between the two sheets of glass that we talked about is only 5/1000th of a millimeter. That is 1/10th the thickness of a piece of hair. It’s amazing that people have invented a way to control the movement of liquid crystals in such a small space. What’s more amazing is that people have developed a way to support these two pieces of glass between such a small space without letting it bend or sag. In fact, making a 30’ TV of this size is a very, very different task. An nother different part of the liquid crystal TV is that the screen looks dark from an angle because the technology is based on a shutter closing or opening to allow light through. Yet, people have found a way to solve these difficulties and made liquidcrystal TVs that some said could never be made. You never know what kind what kind of liquid of liquid crystal TVs will be around when you bee an adult.