How would you use a radio or a telephone ifyou had no electricity or batteries? These1bothered (使烦恼) British inventor Trevor Baylis. So in 1996 he2awind-up (装有发条的) radio. It doesn't need electricity orbatteries. You wind it up3hand. It plays for about an hour. Then,you wind it up4.
Baylis also invented a mobile phone that ispowered by5. The shoes contain (含有) a small battery that is powered when you6.This battery is connected to a mobile phone. These two simple inventions canbring modern7to all parts of the world.
Baylis didn't have a university degree inengineering. In8, he left high school before graduating(毕业). He just loved9thingsto help people. He never knew10ideas would come to him.The idea for the phone came to him in a dream.
Most cars run on gas. Gas cars work verywell. But there is a problem. Cars that run on gas make the air dirty. Thedirty air is not good for people, animals or trees. Gas cars make the air dirtyfor all living things. What can we do? We can drive electric cars!
Electric cars do not use gas. These cars donot make the air dirty. These cars have batteries that power their motors (马达). The batteries can be charged (充电) manytimes. They can be used again and again. This makes electric cars great.
But electric cars have problems too. Theyare slower than gas cars. They are also very quiet. This means that some peoplecan't hear them when they go by. They may not think a car is coming. So theyhave to be careful.
People are finding ways to make electriccars better all the time. Maybe one day all cars will be electric. That wouldbe much better for the world.
Electricity is an important part in our life. We can't see or touch it, but it is all around us. Our life will be terrible without electricity. But some people don't know that everyone should save electricity. When it is not completely dark, many street lamps (路灯) light up early in some streets. Some people don't turn off the lights when they leave the room. Some people are sleeping with the lights on. They are all wrong. Here I make somesuggestions about stopping these things:
*Turn on the street lamps on time. We light them from 7：00 p. m.～5：30 a. m. in summer, and from 5：30 p. m.~6：00 a. m. in winter.
*If some small areas are very dark, just turn on a few lights.
*The distance (距离) between street lights can be 50～60 meters. It can save electricity and money.
*If there are some activities, such as fairs, we can make the lights bright；if there is no activity, lights needn't be too bright.
Ask people to save electricity through TV shows, newspapers, and so on.
Electricity is a valuable resource (资源). It helps us live well and conveniently. We should take action to save it at once!
Cars make our lives more convenient. But theycan also be a problem. For example, fossil fuel (化石燃料)cars mainly cause air pollution.
To improve the environment, many countriesare developing electric vehicles (EVs,电动车).Among them, China is taking a leading role and has created the world's largestEV market.
Last year, over 40 per cent of the 753,000EVs sold in the world were sold in China, more than twice as many as the numbersold in the United States.
"Filling up a fossil fuel car with gas(汽油) is more expensive than charging (充电) an electric car," said Wu Hao, who bought an electric carthis year.
However, there are still some problems. Itcan be hard to find charging piles (充电桩) andthe cars can't go far before being recharged.
Some of these problems are being solved. In2014, China had 31,000 charging piles. Now China has the world's largest EVcharging network, with more than 450,000 charging piles in total.
Developing EVs is one of many efforts thatChina has made to cut down pressure on its environment after the governmentpromised to stop increases in carbon dioxide emissions (二氧化碳排放量) by 2030.
"As China goes, so will the world'scar industry," the Wall Street Journal said.
We are lucky to live in a rich country where we have many things. However, most of us usually (waste) some things.
Electricity is one thing that we waste most. Lights, TVs, (radio) and other things are often kept on even when no one is using them. We should turn them off we do not need them. It takes (little) than a second to do it. Anyhow, not wasting electricity saves money, because we do not have to pay for the electricity we do not use. The (two) thing that we often waste is water. Fresh water is precious, so it shouldn't be wasted. It is only a simple matter of turning a tap. I am sure everybody can do this (easy) if he wants to. Another big waste is food. My mother used to cook so much food that much of it was thrown away. I told her we had wasted so much (food). She thought I was right and now cooks mainly what we can eat.
It is not right to be wasteful. I find there is a simple way of not wasting things. That is (use) only what we need. Do not touch what we do not need. this way, we can stop being wasteful.
Do you know what makes lightning (闪电)?
Lightning strikes happen when ice and water in clouds rub (摩擦) together, and cause atmospheric (大气层的) changes. When this happens, it creates a static charge (静电). Lightning can strike inside the cloud, between two clouds or between a cloud and the earth.
Lightning can be very dangerous. Every year, lightning kills people because it can start big fires or because it reaches a temperature of 28,000℃. About 1,000 people are hit by lightning every year in the United States, and about 100 of them die as a result.
Scientists think that there are more than three million lightning strikes every day in the world. An American man, Roy Sullivan, who worked in a park, survived from the most lightning strikes. And he keeps the highest world record.
Lightning is sure not something to play with. When lightning strikes, it's best to stay inside a large building. Also, do not lie down on the ground, or the electricity may go through you and cause a heart problem.
|
A. It's the last kind of strike that is the most dangerous for humans. B. Lightning makes people shocked, and it happens all over the world! C. Between 1942 and 1977, he was hit seven times! D. Why does lightning strike (击打)? E. To stay safe, do not stand under trees, on hills or near water. |
|
电的重要性及危害 |
电在我们的日常生活中非常重要，电器使我们的生活更方便（convenient）。但是，电会伤害人或引起火灾，如果不安全用电会非常危险。 |
|
安全使用电器 的注意事项 |
开关电器之前，要确保手是干的； 使用电饭煲（rice cooker）时，必须保持锅的外表干燥；如果看到电线破损（be damaged），则不要打开电器。 |
Using electricity safely
