The human body is a living machine, and, like all machines, it needs “fuel” to supply it with energy. This is provided by the food we eat. But how much do we need to stay healthy?
The energy value of food is usually measured in calories(卡). A calorie is the amount of heat required to raise the temperature of 1 kg of water by 1℃. The number of calories people need per day is different, as the picture shows. Also, the number of calories you use at any one moment normally depends on the activity you are in. For example, you need more calories for standing than for sitting, more for running than for walking, and so on.
The energy in food is in the form of three kinds of chemical materials—carbohydrate（碳水化合物）, protein（蛋白质） and fat. Carbohydrate provides 3.8 Cal /gm of the energy, protein 4.0 Cal/gm, and fat 8.8 Cal/gm. Each food contains different amounts of these materials, as the round pictures show.
(P= protein      C= carbohydrate    F=fat)
【小题1】How many calories are needed to raise the temperature of 5kg of water from 35℃ to 90℃?

完形填空（10分）阅读下列短文，选择可以填入空白处的最佳选项。
Water, it’s a problem for the whole world. A bottle (瓶) of water may not seem like much to us,  1  it can help the people who live in drought-hit (遭受旱灾的) areas in China.
　　In the past few months, many places in southwest China have 2     a serious drought. There has been very little  3 since last autumn. More than 20 million people are 4   trouble finding safe drinking water.
　　After learning about the drought, many people around the country helped by  5   away water, money and other resources (资源) to the people there.
　　Last week, the Young Pioneers and the Communist Youth League in China called on (号召) each student to give one bottle of water to the drought-hit area. In Xi’an, 900 students bought over 1000 bottles of water 6     their pocket money. They also wrote their  7   on the bottles. “I hope you get more rain there. I hope you are happy.”
　　A bottle of water isn’t much, but thousands of bottles will be very  8  . The serious drought has also made students  9  the importance of saving water. One student said, “I have decided to take a shower twice a week  10   every day to save water.”

We each have a memory(记忆力). That’s why we can still remember things after a long time. Some people have very good memories and they can easily learn many things by heart, but some people can only remember things when they say or do them again and again. Many of the great men of the world have got surprising memories.
　　A good memory is a great help in learning a language. Everybody learns his mother language when he is a small child. He hears the sounds, remembers them and he learns to speak. Some children are living with their parents in foreign countries. They can learn two languages as easily as one can , because they hear, remember and speak two languages every day. In school it is not so easy to learn a foreign language because the students have so little time for it, and they are busy with other subjects , too. But your memory will become better and better when you do more and more exercises.
根据短文内容，选择正确答案（10分）
【小题1】Some people can easily learn many things by heart because      .
A、they always sleep very well
B、they have very good memorie
C、they read a lot of books
【小题2】Everybody learns his mother language     .
A、at the age of six
B、when he is a small child
C、after he goes to school
【小题3】Before a child can speak, he must     .
A、read and write
B、make sentences
C、hear and remember the sounds
【小题4】In school the students can’t learn a foreign language well because    .
A、they have no good memories
B、they have no recorders
C、they are busy with other subjects
【小题5】Your memory will become better and better     .
A、if you have plenty of good food
B、if you do more and more exercises
C、if you do morning exercises every day

We are all busy talking about and using the Internet, but how many of us know about the history of the Internet?
　　Many people are surprised when they find that the Internet was set up(建立) in the 1960s. At that time, computers were large and expensive. Computer networks(网络) didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system(系统) had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent through another part. In this way the computer network system would keep on working all the time.
　　At first, the Internet was only used by the government, but, in the early 1970s, universities, hospitals and banks were allowed to use it too. However, computers were still expensive and the Internet was difficult to use. By the start of the 1990s, computers become cheaper and easier to use. Scientists had also developed software(软件) that made “surfing(浏览)” the Internet more convenient (方便).
　　Today it is easy to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students.
The Internet has now become one of the most important parts of people’s life.
根据短文内容，选择正确答案（10分）
【小题1】The Internet has a history of ______ years.
A、about 40             B、less than 30         C、more than 45
【小题2】Scientists set up a new network system to ______.
A、make the computer cheaper
B、make the system work well
C、make the computer go well
【小题3】The Internet was widely used in the ______.
A、1960s                B、1970s                C、1990s
【小题4】The underlined words “get on-line” in Chinese mean ______.
A、上机               B、上网                 C、接线
【小题5】Which of the following is NOT true?
A、People had enough softwares to get on-line fifteen years ago
B、Computers are much cheaper than before.
C、Today the Internet is used everywhere.

As many as 10 of the 17 kinds of penguins（企鹅）may be in danger of disappearing. The number of penguins have decreased(减少) by 30% since 1987.
　　Penguins are black and white birds that live in the southern part of the world. They are common in South America，New Zealand，Australia and South Africa. Many live near cold waters. But some live near warm waters in Galapagos Islands. Penguins cannot fly，but they are fine swimmers. Penguins eat fish and krill(磷虾).
　　The warming of the earth is the decrease in penguin populations. The heating of the air has caused ocean waters to become warmer. Higher water temperatures have reduced the supply of fish and krill. Some years later these birds are completely unable to reproduce(繁殖).　 Besides，many adult penguins die of hunger.
　　Widespread(广泛的) fishing，exploration for oil and oil leaks(漏) also make penguins be in danger. Poisonous organisms(生物) in ocean water are another danger. Penguins also have their enemies，including wild dogs，sharks，seals and sea lions.
　　News about penguins is not all bad，however. Several years ago，oil leaking from a ship hurt 40% of the penguins in South Africa. The penguins became covered with oil. But thousands of people helped clean and treat the birds well. Then they returned the penguins to the wild.　 Now these South African penguins are reproducing in higher numbers than before the oil leaking.
【小题1】Penguins ___________.