Plants and animals have some very clever desi...

Plants and animals have some very clever design features (特征). Scientists study these models. Then they can make new products using the ideas from nature.

Copying what we see in nature can improve how we travel. Japan’s first super-fast trains pushed air through tunnels at high speeds. When a train came out of a tunnel, it made a loud noise. Kingfisher birds hardly make a splash (溅水声) when they dive into water. Engineers changed the front of the trains to match the shape of the kingfisher. Then the air passed over the trains. The problem was solved!

People look underwater for ideas, too. Sharks have skin covered in special scales ( 鳞 ). These scales help sharks move quickly through water. Scientists have copied sharks’ skin to make swimsuits. Aircraft engineers also copied the scales. They made a coating for the wings of airplanes that is similar to sharks’ skin. Both the swimmers and the airplanes now travel faster.

Scientists studied how dolphins communicate to solve a big problem. Some earthquakes happening on the sea floor can cause tsunamis (海啸). People need to be warned if a tsunami is coming. Scientists use special tools to gather information on the sea floor. Then the information is sent to the surface as sounds. But on the way, the sounds can get muddled, so the scientists may not hear them.

Scientists studied the way dolphins “talk”. Dolphins have a clever way to send messages through water. Their system is better than some of our systems. Now, experts have copied the way dolphins send messages. This will help them track tsunami waves. Nature’s designs are built to last. When we observe the natural world, we can find wonderful ways to improve our lives. What ideas from nature will people borrow next?

The possibilities are endless!

1.What did engineers copy from the kingfisher bird?

A.Its high speeds. B.Its special looks.

C.Its sound when it’s flying. D.Its ability to travel in water.

2.What can we learn from Paragraph 3?

A.Swimmers can swim as fast as sharks now.

B.Engineers have copied ideas from swimsuits.

C.People have copied ideas from sharks.

D.Shark scales are used to make wings of planes.

3.What does the underlined word “muddled” in Paragraph 4 probably mean?

A.Not clear. B.Very loud.

C.Really strange. D.Quite terrible.

4.What is the purpose of the system inspired by dolphins?

A.To look for dolphins. B.To help people ride waves.

C.To keep tsunamis away. D.To give early warnings.

九年级英语阅读单选中等难度题查看答案及解析

--- Can we find 　　　　　　 before an earthquake?

--- Yes. Some animals will run wildly and some plants will come out in the wrong season.

A. something unusual

B. anything unusual

C. unusual something

D. unusual anything

九年级英语单项填空中等难度题查看答案及解析

We have only one earth. It is the only environment for humans, animals and plants to live or grow in. However, we are polluting our earth every day. Good news is that the whole world has realized the serious problems and has taken actions to fight against it.

World No Tobacco Day (May 31)

The first World No Tobacco Day is April 7, 1988. Since 1989, it was changed to be May 31st every year. The purpose of the World No Tobacco Day is to encourage people not to smoke.

World Water Day (March 22, 1993)

United Nations named 22 March as the first World Water Day in 1993. It’s a day to celebrate water. It’s a day to prepare for how we manage water in the future. It is celebrated around the world every year.

Earth Hour ( 2007)

Earth Hour started for the first time on March 31, 2007 in Sydney, Australia. Since then, the last Saturday of every March was named as Earth hour day that year. In March 19, 2016, more than 350 famous buildings in 178 countries around the world turned off the lights for one hour to remind people to save electrical power.

What does China do to save our environment?

Smoking is not allowed in all indoor public places from 2014.This is the first time for China to care about personal health in public places.

Ban(禁令) on free plastic bags

Since June1, 2008, free plastic shopping bags are not allowed to provide in all supermarkets, shopping malls, and other places. It is to encourage people to go back to carry cloth bags and use baskets for their shopping things.

九年级英语填空困难题查看答案及解析

请先阅读下面的短文，掌握其大意，然后用方框中所给的词的适当形式填空，并将答案填写到答题卷的相应位置。每个词限用一次。

What do people, plants and animals have in　 　 1.　 ? We all need water. All　 　　 2.　 　　 things must have water to survive, whether they get it from a river, a rain cloud or a water bottle.

3.　 water, your body would stop working properly. Water makes up more than half of your body　 4.　 　 and a person can’t survive for more than a few days without it. Why? Your body needs water to do many important jobs. For example, your blood contains a lot of water. It　 5.　 　　 oxygen (氧气) to all the cells (细胞) of your body. Without oxygen, the cells would　 　 6. 　 and your body would stop working.

Water can also help you fight off　 7.　 . You need water to digest (消化) your food and get rid of waste, too. 　 8.　 water is so important, you might wonder if you’re drinking enough. In fact, there is no certain amount of water that you need to drink every day.

You can help your body by drinking when you’re　 9.　 　 and drinking extra water when the weather is hot, especially　 10.　 　　 playing sports or exercising. Then your body will be able to do all of its important jobs and you’ll feel great!

九年级英语选词填空中等难度题查看答案及解析

Why do plants grow in some places and not in others? Why does some land have so much growing on it, while other land has almost no plants growing on it at all? To grow, plants need several things. One is warmth. In very cold places almost nothing grows. That’s why dry deserts everywhere are almost not covered by trees or grass.

Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on hard land. The town is built on hard land. The paints here have only the soil found between thecracksof the stones to grow in.

Another thing plants must have before they can grow is food.

What will happen if we try to make things grow on the sandy beach? A few plants, such as beach grass, will grow in sand, but most plants won’t. Even if the weather is warm enough and we water the plants each day, many of them will die because the sand on this beach has almost no food for plants.

1.

A. two　　 B. three　　 C. four　　 D. five

2.

A. 缝隙　　 B. 表面　　 C. 夹层　　 D. 底部

3.

A. easy　　 B. difficult

C. impossible　　 D. important

4.

A. there isn’t enough sunlight

B. there is too much water

C. it is too crowed there

D. it has little food for plants

5.

A. science　　 B. history　　 C. travel　　 D. math

九年级英语阅读理解中等难度题查看答案及解析

Why do plants grow in some places and not in others? Why does some land have so much growing on it， while other land has almost no plants growing on it at all?

To grow， plants need several things. One is warmth. In very cold places almost nothing grows. Plants also need water. In very dry parts of the Earth only a few unusual plants can grow. That's why dry deserts(沙漠) everywhere are almost not covered by trees or grass.

Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on hard land. The town is built on hard land. The plants here have only the soil(土壤) found between the cracks of the stones to grow in.

Another thing plants must have before they can grow is food.

What will happen if we try to make things grow on the sandy beach? A few plants， such as beach grass， will grow in sand， but most plants won't. Even if the weather is warm enough and we water the plants each day， many of them will die because the sand on this beach has almost no plant food.

1.The passage can most probably be found in 　　　　　　 .

A. a science book　 B. a newspaper

C. a magazine　 　　 D. a report

2.Plants need 　　　　　 things to grow well according to the passage.

A. two　　　　　 B. three　　 C. four　　 D. five

3.The reason why most plants can’t grow on the sandy beach is that　　　　　 .

A. there isn’t enough sunlight

B. there is too much water

C. it is too crowded there

D. it has little food for plants

4.Which of the following is true?

A. Beach grass can hardly grow in sand.

B. Plants need food to help them grow.

C. Plants want a place where their flowers can come out.

D. Dry deserts everywhere are almost covered by trees or grass.

九年级英语阅读理解中等难度题查看答案及解析

Would you like to adopt an animal? Although this sounds very unusual, some children have done just this. The Natural Zoo has given people the chance to adopt animals by paying for all of its food for one year. One of the animals that needed parents was a young tiger named Brocky. The people at the zoo said that it would cost about $900 a year for the food for Brocky.

Not many boys and girls have $900 to spend. That is why several hundred children and grown-ups each have sent a little money to the zoo to help pay for Brocky’s food. Some children sent in only a quarter because that was all the money they had. Other children sent in more money than that.

Since so many people sent money to the zoo to help pay for Brocky’s food, he now will be able to eat as much as he wants. Brocky surely must be a happy tiger to know that he has so many adopted parents. Many children must also be happy to know that they have helped to feed him. It really will be thrilling for those children to go to the Natural Zoo to visit their adopted tiger Brocky.

1.Brocky is________.

A. an animal zoo

B. an adopted child

C. a tiger without children’s love

D. a tiger in need of adoption

2.Several hundred people give money to the zoo to help Brocky because ________.

A. its food is too expensive for one person to afford

B. people don’t want to spend too much money on Brocky

C. people don’t love Brocky enough

D. the zoo forces them to do so

3.Children will be ________ if they go to the zoo to visit the tiger Brocky.

A. frightened　　　　　　 　　 B. excited and happy

C. nervous　　　　　　　　　　　 D. surprised

4.With so many people’s money, Brocky now can _________.

A. play with many toys

B. live without being hungry

C. eat meat every day

D. have an air-conditioned room to live in

5.We can infer(推断)from the passage that ________.

A. zoos are too poor to feed the animals

B. there are too many animals in the zoo

C. many people are kind to animals

D. children love animals better than adults do

九年级英语阅读理解中等难度题查看答案及解析

Forests are very important because some birds make their nests _________　 trees and some small animals and insects look for some fruit _________ trees as their food.

A.In in B.on ,in C.on, on D.in, on

九年级英语单选题中等难度题查看答案及解析

A science book gives facts. Some science books tell us about animals. Some tell us about plants. Some tell us about outer space. This page tells us about animals.

Do you know that not only the fish but also some animals live in the sea? For example, the whale is not a fish. It can’t breathe in the water. It swims in the water. But it comes up for air.

The blue whale is the world’s biggest animal. There are other sea animals, too. One is called the dolphin. Dolphins need air to live. They breathe air, as whales do. Dolphins are very clever. They sometimes seem to speak to each other.

Many other animals live near the sea. Seals（海豹）and otters（水獭）love the sea. They swim and play there. They eat fish and sea plants. Seals and otters have thick fur. The fur keeps them warm.

1.The passage mainly tells us about ____________.

A．fishes            B．plants            C．science           D．sea animals

2.The blue whales live in the sea. They breathe air as ______do.

A．dolphins          B．fish              C．crocodiles         D．sea plants

3.Which of the sentences below is NOT true?

A．The whale can swim in the sea like a fish.

B．The whale can breathe in the sea like a fish.

C．Both whales and dolphins are sea animals.

D．Seals and otters like living near the sea.

4.What food do seals and otters like eating?

A．Meat.            B．Fruits.            C．Both fish and sea plants.   D．Leaves.

5.Some sea animals can keep themselves warm because ___________.

A．they are big animals                     B．they like playing in the sea

C．they have thick fur                      D．they eat enough food every day

九年级英语阅读理解中等难度题查看答案及解析

Many animals use some kinds of “language”. They use signals (信号)and the signals have meanings. For example, _________a bee has found some food it goes ___________its home. It is difficult for a bee to tell _________bees where the food is by speaking to them, but it can do a little dancing. This tells the bees where the food is and_________it is.

Some animals show___________ they feel by making sounds. It is not difficult to tell if a dog is angry because it barks. Birds make several different sounds and_________ has its meaning. Sometimes we humans make sounds in the same way. We make sounds like “Oh” to _________how we feel about something or we drop something on our feet.

We humans have languages. We have words. These words have meaning of things, action, feeling or ideas. We are able to_________ each other information, to tell other people _______we think or we feel. By writing down words, we can remember what has happened or send messages to people far away.

Languages, like people, live and die. If a language is not used by people, it is called a dead language. This language cannot live and grow because ____________speaks it.

A living language, of course, is often spoken by people today. It grows and changes with time. New words are created and some old words have new meanings.

1.A.because B.since C.when D.as

2.A.out of B.back from C.away from D.back to

3.A.each other B.another C.the other D.others

4.A.how long B.how far C.how many D.how old

5.A.why B.which C.how D.what

6.A.each B.every C.all D.some

7.A.show B.say C.talk D.speak

8.A.give B.put C.show D.take

9.A.that B.which C.what D.why

10.A.someone B.no one C.anyone D.everyone

九年级英语完型填空困难题查看答案及解析