You must think a computer is the best thing in the world, right? You must think it works at a super speed and can do everything? Well, it’s not! In fact, the brain is much more powerful than any super computer! Think about when a glass is just about to fall off the table. Your brain controls everything that you need to do to save that glass from falling. First your eyes check out what’s going on, then tell your brain, and your brain decides how quickly you need to react (反应), and then your muscles (肌肉) go into action. That is just from your brain. No computer could ever come close to that!

The brain weighs just 3 pounds, but it controls everything you do from thinking, learning, feeling even to breathing and your heart beating. Even though the brain is just 2% of your body weight, it uses around 20% of all your energy in your body. That is a lot for such a small organ (器官). There are about 100 billion tiny, tiny little cells in your brain. There are so many that it would take you over 3,000 years to count them all!

Your brain stops growing when you’re 18, but it actually keeps on developing and learning new things. So your parents are really super smart! You won’t be able to fool them! Believe it or not, your brain NEVER stops working. Even during sleeping, the brain works for long-term memory establishment (建立). It is realized that the brain is the second organ in the body as the heart that never stops during human lives.

So everyone should be proud of such a gift of nature.

1.In Paragraph 1,the writer wants to tell us .

A.eyes and muscles react quickly B.the brain controls everything in your body

C.the computer is the best thing in the world D.the brain is more powerful than any computer

2.What can we know from the passage?

A.The brain doesn’t work during sleeping. B.The brain is the only organ that never stops.

C.The brain keeps growing during human lives. D.The brain keeps on developing during human lives.

3.Which word can best describe the brain according to the passage?

A.Magic. B.Quick. C.Light. D.Developing.

4.In which magazine can the passage be found most probably?

A.Business Weekly. B.Medicine. C.Science. D.Sports.

Fresh green grass. Hundreds of colorful wild flowers. Water running into little pools. Birds making their homes in boxes. The 9, 500-square-metre Augustenborg Botanical Garden may look just like any other well-organized park but there’s a difference. It lies on the roofs(屋顶) of industrial and office buildings in the city of Malmo in Sweden.

Green roofs are not a new invention. And now they are getting popular again. The common roofs of a modem city have endless black surfaces with no life or water. Perhaps that’s why a garden on a roof becomes such a perfect choice for more and more people.

Green roofs are not just pretty. They also help to moderate the city temperature. The high temperatures on common roofs in the summer can make top floor flats uncomfortably hot. What is more, they play a part in making the cities hotter than the countryside around them, causing the “urban heat-island effect”. On a green roof, however, with its plants and water, temperatures change only a little, as they do in a park. This can greatly cut the costs of heating and cooling in the building below.

Also, a green roof takes in rain water, and protects the city drainage(排水) system. ____ And small animals and birds can make their homes on it. Thanks to this, the city may become part of nature, rather than something completely separate from it.

While the cost of building such a roof can still be higher, it can be cheaper in the long term as a result of energy savings. And wouldn't it be wonderful to be able to walk out into a garden high above the city’s noise and traffic, whether you're at school or in an office or just at home in a ten-floor block.

1.With the example of Augustenborg Botanical Garden, the writer wants to explain ____.

A. how wildlife is protected B. what a green roof is like

C. how to organize a good park D. what to do with a spare roof

2.The underlined word “moderate” in Paragraph 3 is the closest in meaning to “____”.

A. raise B. check C. record D. control

3.Which of the following is the best sentence to fill in the blank in Paragraph 4?

A. A green roof is alive. B. A green roof stops pollution.

C. A common roof is noisy. D. A common roof increases the cost.

4.The purpose of the passage is to ____.

A. discover the problems with green roofs B. introduce the change of green roofs

C. show the amazing beauty of green roofs D. describe the advantages of green roofs

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网