Dictionaries say that &ldquo;spring fever&rdquo; is a lazy or restless feeling . People usually have the feeling on the...

题型：阅读选择题类：真题难易度：容易

   Dictionaries say that “spring fever” is a lazy or restless feeling . People usually have the feeling on the first warm day of spring. Everyone has probably felt it at one time or another . people have talked about it for years.
   Recently, scientists have taken a good look at spring fever. What they found is quite surprising.
   In many places we live in , the winter months often seem dark and dreary. When spring comes late March , the world becomes colorful . The number of daylight hours grows with each passing day. According to many scientists, all the sunlight sets off chemicals in the brain (大脑). The chemicals make our feeling change and bring on spring fever.

（1）、 How do people who have spring fever feel ?

A、active B、awake C、energetic D、restless

（2）、Scientists think that _________ cause(s) spring fever .

A、colors B、sunlight C、dark D、illness

（3）、According to the passage ,the underlined word “dreary ”means“______” in Chinese.

A、沉闷的 B、暖和的 C、晴朗的 D、明亮的

（4）、The best title for the passage is ______________ .

A、How to Get Over Spring Fever B、Spring Fever C、Darkness in winter D、Spring and winter

举一反三

A plant(植物) makes its own food in its leaves .Water comes to the leaves through the roots（根）. Air gets into the leaves through very small holes（孔） . The green coloring in the leaves uses the water and air to make the food for the plant . It also needs sunshine because a plant can make food only when the sun is shining.
Animals and people could not live without green plants . They both eat plants .People and some animals also eat the meat of some animals and these animals eat plants.

Fun Facts about animals

●After killing an animal, a cheetah waits half an hour to catch its breath.	●The biggest horses are the Shire horses. The tallest on record is 198cms from shoulder to leg.	●The only mammal that can fly is the bat. Bat's wings are overgrown hands.
●Gorillas are actually very gentle animals although they have bad reputation (声誉). ●Gorillas build nests in tree tops to sleep in.	●The rhino has the thickest skin of any animal. Its skin is 2cms thick and covers their body like armor.	●An elephant's trunk has no bones in it, only 100,000 muscles!!! ●Elephant babies take 22 months to develop inside their mothers before they are born.
●A kitten is born blind and helpless and stays close to its mother for protection. In just nine weeks, it can grow big enough to leave its mother and look after itself.	●A camel's hump is actually used to store food. It is made of extra (多余的) fat. ●They have long legs to keep them as far away from the ground as possible	● Bears usually walk on 4 legs, but when they are frightened, they stand up and walk on two legs to make themselves appear bigger.

根据理解，完成阅读

Life will be different in the future, because many changes will come. But what will the changes be? Let's have a look now.

Children will not use pens or books in the future. Every student will have a computer at school. Just use their computers and they will find everything they are interested in.

People will wear a kind of clothes. They are made of newspapers. People don't have to wash them because the clothes won't get dirty.

People needn't work for eight hours a day. They will have more free time for sports, watching TV and family trips.

Robots will help people to clean the room. What's more, they can play chess with people, play the piano and talk to people.

I think we will live a happy and healthy life in the future.

阅读理解

Once people thought that dinosaurs were brown or gray in colour, but the answer is to be found out. After examining the remains of a dinosaur, scientists say the colour of the feathers is bright. American and Chinese scientists rebuilt the feathers of a flightless(不能飞的)dinosaur

that lived about 150 million years ago, and researchers studied melanosomes(黑素体)in the feathers. The researchers compared them to the melanosomes that control the colour of feathers on modern birds. They were then able to make out the colours of dinosaurs' feathers. Richard Prum, a biologist(生物学家)at Yale University, said the dinosaur would be a beautiful creature if it were still alive. The discovery is useful to scientists in another way. It helps them better understand not only how dinosaurs looked but also how they lived in their daily life. Some researchers plan to use this way to study the colours of other feathered dinosaurs.

阅读理解

DNA is the whole" map" of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Mr. Mendel discovered why we look the same as other people in our family. It is because of small things called "genes" (基因)in our body. In 1953, two scientists, Watson and Crick, found out that genes are really messages. They're written in the DNA with a special language.

In 1961, another two scientists found the first" word" that they could understand in that language. It shows how DNA tells the cell(细胞)to build its parts. So far, scientists have found all the words in the DNA map, but we still don't understand what they all do. By understanding what just one" word" means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.

Most people hope that this can help to make better medicine to help sick people. Other people worry that when we learn more" word" and find out more information, we will use it in the wrong way. Just to make people more attractive, or stop sick people getting jobs.

阅读理解

The world's first hydrogen-powered(氢动力) trains have begun running in Germany last month. The new trains will run 100-kilometer trips and can travel up to 140 kilometers an hour.

A French railroad company called Alstom built two hydrogen-powered trains. Teams in Germany and France cooperated on the project, which was supported by the German government. The new train model, called the Coradia iLint, signals the beginning of efforts in Germany and other nations to move away from pollution-producing diesel(柴油) trains.

Compared(与…相比较) with diesel trains, the Coradia iLint is designed to run on non-electrified train lines with low levels of noise. It uses a process that combines hydrogen and oxygen to produce electrical power. If the system produces more energy than the train needs at that time, it can store the extra energy in batteries. The only emissions(排放物)are water and steam.

A single tank of hydrogen can run a Coradia iLint train for about 1,000 kilometers. This is very similar to the distance a diesel-powered train can run on with a single tank.

Hydrogen-powered trains cost more than diesel trains to build. But Alstom officials say the operating costs are much lower. The company plans to provide another 14 Coradia iLint trains by the year 2021. Several other European countries have also expressed interest in developing hydrogen train systems. France has already said it wants its first hydrogen train to be operated by 2022.

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