This week we learnt a lot about science. We also did a lot of 36.e
2 . In the past 200 years,the earth's temperature has increased greatly.It's reported that a marked increase in the temperature of about 0.7℃ appeared at the end of last century.Some scientists think mini-umbrellas(微型伞)might reduce the global(全球的)temperature.
Building a single umbrella,which is big enough to cover the whole earth,seems to be impossible.Roger Angel,a scientist from the USA,has carried out research to deal with this problem.He came up with an idea of mini-umbrellas.In fact,each mini-umbrella is made up of two parts,a spaceship and a sunshade(遮阳篷).A spaceship weighing about 1g would carry a sunshade that is half a meter long.It would be mostly transparent.That means light can pass it directly to reach the earth,with lands and oceans clearly in view.
Pressure(压力)from the sunlight would keep the little spaceships in position around the earth at a distance of about 1.5 million kilometers.As a result,sending over 1,000 billion mini-umbrellas into space would reduce the amount of sunlight reaching the earth.This allows sunlight to be reflected(反射)back to space easily,causing the temperature of the earth's ground to fall off.Covering large areas of the earth,mini-umbrellas together could reflect 1.8 percent of sunlight back.In Roger's plan,scientists will send up 800,000 mini-umbrellas at a time,20 million times in all during ten years.Scientists suggest the earliest launch could be in just 16 years.
Not all the scientists agree with the idea.Some suppose there should be easier and much cheaper ways to prevent the earth from getting too hot,such as to slow down the pollution people bring and to reduce the human activities.Whatever the result of the argument is,this idea of mini-umbrellas in space is certainly creative.
1. The underlined word“transparent”here probably means “ ”.| A．透明的 | B．透气的 | C．透风的 |
| A． | B． | C． |
| A．pressure from the sunlight would allow the mini-umbrellas to be reflected back to space easily |
| B．the mini-umbrellas would reduce the amount of sunlight reaching the earth |
| C．sunlight would never come into the earth |
| A．Scientists suggest that the earliest launch could be in just 16 years. |
| B．A spaceship weighing about 1g would carry a sunshade. |
| C．Roger will send up 800,000 mini-umbrellas into space during 20 years. |
| A．THE TEMPERATURE OF THE EARTH |
| B．A MINI-UMBRELLA PLAN |
| C．CHEAPER WAYS TO PREVENT THE POLLUTION |
3 . Nanotechnology is a new type of science that will be wideIy used in many fields. Do you want to know more about it?
Imagine: A television screen has the size and thickness of a piece of paper. You carry it around in your pocket and take it out when you want to watch a show. (1) A guitar is so tiny thatis so tiny that you can’t see it with the human eyes, but you can hear sounds when its strings are pulled.
(2)Naotechnology is the science, this kind of science can deal with doing things in a very small way, and it is being studied and developed all over the world. Many scientists say nanotechnology will prodece the next industrial revolution （工业革命）.
(3)也许纳米技术对医学将有最大的影响。Imagine nanobots in medicine. Thousands or even millions of tiny machines can be sent into the human body with specific tasks. For example, (4)they can be designed to find and destroy cancer cells or viruses（病毒）. Other machines may stay in the human body forever to help organs（器官）that are not working properly.
When could all of these happen? Scientists predict that most of these are possible in the next 30 years. Thousands of scientists around the world are working on these micro-machines. Nanotechnology is just around the corner.
根据短文内容，完成下列各题。
1. 将(1)处翻译成中文。
2. 将(2)处改成复合句。
3. 将(3)处翻译成英文。
4. 写出(4)处“they”指代的内容。
5. 找出该文章的中心句。
The robot fish are about 1.5 metres long. There will be a detector (探测器) in each fish’s
body. It can find the pollution in the water, and then the robot fish will eat part of it.
Unlike other robots, the robot fish don’t need to be operated (操作) by people far away. The robots all have a big battery (电池) that can last for about eight hours. They can “swim” in the sea freely and send back information to people on the beach. After their batteries run down, they will go back to the beach by themselves.
There are five robot fish altogether. Each costs about 29,000 dollars. They are part of a three-year project by the joint effort of the engineering company BMT Group and University of Essex in England.
1. The robot fish will help people find out in the water.
| A．more fish | B．the treasure | C．some batteries | D．the pollution |
| A．They will eat part of it. | B．They will stop working. |
| C．They will tell people where it is. | D．They will take it to the beach. |
| A．They can work for five hours. | B．They can work for eight hours. |
| C．They can work for twelve hours. | D．They can work for one day. |
| A．14,500 | B．29,000 | C．145,000 | D．1,450,000 |
| A．The robot fish can eat anything in the water. |
| B．The robot fish need to be operated by people. |
| C．The robot fish are 1.5 metres long and they look like sharks. |
| D．The robot fish can go back to the beach when the batteries run down. |
