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完形填空
Scientists study the world and learn about things using a process called the scientific method. By asking important questions and the answers, it is possible to make amazing discoveries! Sometimes a scientist is to answer his own questions, but if he has taken good notes ,another scientist may come along later who is able to use new knowledge to answer it.
When you use the scientific method to an experiment, you start by making observations(观察) about something that you. Based on your observations, you make a hypothesis(假设）. This is using you know to make a smart guess about what you think could happen. Then you are ready to begin your experiment. All your experiment you take down notes, which are experiment date(资料). You are constantly(不断地） making observations during this time. You may make discoveries that cause you to improve your experiment as you go. , you conclude your experiment and begin to look over your notes to decide what it all means. Based on what you have learned, you make a final statement about your hypothesis was correct or not. You have to have reasons and evidence to support what you are saying.
Using the scientific method can be difficult, but worthy. Because all the steps are organized in a process, the are more valid(可信的). When you provide observations as evidence to support what you are saying, your ideas are more likely to be accepted.
1.A. waiting for B. searching for C. worrying about D. complaining about
2.A. unable B. sure C. ready D. surprised
3.A. read B. refuse C. prevent D. conduct
4.A. hurts B. represents C. interests D. attacks
5.A. what B. when C. why D. which
6.A. without B. including C. except D. during
7.A. controlled B. decided C. called D. carried
8.A. Firstly B. Suddenly C. Finally D. Mostly
9.A. whether B. what C. how D. when
10.A. problem B. results C. services D. aims
九年级英语完形填空中等难度题查看答案及解析
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Scientists study the world and learn about things using a process called the scientific method(方法). By asking important questions and16the answers, it is possible to make amazing discoveries! Sometimes a scientist is17to answer his own questions, but if he has taken good notes another scientist may come along later who is able to use new knowledge to answer it.
When you use the scientific method to18an experiment, you start by making observations(观察) about something that19you. Based on your observations, you make a hypothesis. This is using20you know to make a smart guess about what you think could happen. Then you are ready to begin your experiment. All21your experiment you take down notes, which are22 experiment date(资料). You are constantly making observations during this time. You may make discoveries that cause you to improve your experiment as you go.23, you conclude your experiment and begin to look over your notes to decide what it all means. Based on what you have learned, you make a final statement about 24your hypothesis was correct or not. You have to have reasons and evidence to support what you are saying.
Using the scientific method can be difficult, but rewarding. Because all the steps are organized in a process, the25are more valid(可信的). When you provide observations as evidence to support what you are saying, your ideas are more likely to be accepted.
1. A．waiting for B．searching for C．worrying about D．complaining about
2. A．unable B．sure C．ready D．surprised
3. A．read B．refuse C．prevent D．conduct
4. A．hurts B．represents C．interests D．attacks
5. A．what B．when C．why D．which
6. A．without B．including C．except D．during
7. A．controlled B．arranged C．called D．carried
8. A．Obviously B．Suddenly C．Finally D．Mostly
9. A．whether B．what C．how D．when
10. A．problem B．results C．services D．aims
九年级英语完型填空中等难度题查看答案及解析
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One way that scientists (科学家) learn about man is by studying animals．In this lab, the scientists are studying the relationship between diet and health．
They are studying the relationship between the amount (数量) of food the mice eat and their health．The mice are in three groups．All three groups are receiving the same healthy food．The first group is eating one cup of food each day, the second group is eating two cups, and the third group is eating three cups．
After three years, the healthiest group is the one that is only eating one cup of food each day．The mice in this group are a little thinner. But they are more active．Most of the day, they are running, playing with one another．Also, they are living longer．Mice usually live for two years．Most of the mice in this group are still alive after three years．
The second group of mice is healthy, too．They are active, but not as active as the thinner mice．They are only living about two years．
The last group of mice is receiving more food than the other two groups．Most of the day, these mice are eating or sleeping．They are not very active．These mice are living longer than the scientists thought－about a year and a half．But they are not healthy．They are sick more often than the other two groups．
1.People give each group of the mice _______ amount of food every year.
A. a different B. the same C. a small D. a large
2.The experiment (实验) lasted for at least _______ years．
A. one and a half B. two C. two and a half D. three
3.The underlined word “they” in the second paragraph refers to _______.
A. the scientists B. the mice in the first group
C. all the mice D. the mice in the last group
4.The best title for the passage is ________．
A. Man and health B. Diet and animals
C. Diet and health D. Animals and human beings
5.The result of the experiment mainly shows that ________．
A. eating less may bring longer life
B. the mice eat more than the scientists thought
C. the mice live longer than the scientists thought
D. the more exercise you take, the healthier you will be
九年级英语阅读单选中等难度题查看答案及解析
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Scientists have no ideas about how the trees communicate with each other.
A. learn from B. get things from C. send messages to
九年级英语单项填空中等难度题查看答案及解析
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阅读短文，从所给的A、B、C三个选项中选出最佳选项。
There are many kinds of food in the world. Scientists learn a lot about them. They say that there are some kinds of food people must eat every day. For example, people must eat some green and yellow vegetables. We shouldn't eat too much meat.
People also need to eat some fruits, bread and rice. Of course our bodies need some water and milk. Scientists say people in different countries and different places eat different kinds of food. They cook food in different ways. Different people eat at different times. In one place, people eat once or twice a day. But in another place, people eat three or four times. The scientists say when to eat and how many times to eat are not important. What we eat is the most important thing.
Nowadays, the world faces two problems. People in some places, for example, in Africa, are not full. Many people are eating junk food. It's bad for people's health. So it's our duty to make everyone full and make everyone healthy.
根据短文内容，选择正确答案。
1._______ know a lot about food according to the passage.
A.Farmers B.Cooks C.Scientists
2.Scientists think the most important thing about food is
A.when to eat B.what to eat C.how often to eat
3.Which of the following statements (陈述) is NOT true?
A.All the people in the world have enough food to eat.
B.Many people are eating unhealthy food.
C.Everyone is needed to help solve the two problems.
4.______is not good for our health.
A.Potato chips B.Bread C.Milk
5.We may read this passage in
A.a letter B.a story C.a health magazine
九年级英语阅读单选中等难度题查看答案及解析
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Geography is the study of Earth and its climates. Scientists use it to study global warming and track the weather. Governments use it to learn where people live and work and to plan what to do with the land. It is now easier than ever to use geography because of a science called space technology.
The United States launched its first satellite in 1958. Some space missions that followed were geographical studies. In fact, earth science is a big part of the work of the National Aeronautics and Space Administration (NASA).
Astronauts looked out of the space shuttle. They decided to take photographs of Earth from their vantage point. Over the years, picture quality improved. Shuttle photography now shows land features, such as rivers. It can even show the streets of large cities. Photos of the same places at different times show how the land is changing.
NASA does not use just photographs, though. In 1958 it launched TIROS (the Television Infrared Observation Satellite). This first use of a satellite to study Earth was effective in giving weather forecasts. It led to the creation of new space tools to use in geography.
The Landsat Program began in 1972. This satellite sent detailed views of Earth from space. The pictures were so precise that scientists could count the number and kinds of crops in a field. Landsat showed where Earth’s surface had faults along which earthquakes might happen. This information helped in the planning of new cities and factories. Landsat also made discoveries. In Antarctica it located ranges of unknown mountains. It pinpointed small lakes in Virginia that were no ton maps. Landsat, now more advanced, still flies today.
Another space tool is Earth Observing-1 (EO-1). This spacecraft flies right behind Landsat. It takes pictures of the same sites. The two sets of pictures, viewed together, show how cities grow and how other places, such as rain forests, become smaller over time. This helps scientists learn how people affect geography.
One of the newest space tools is the Geographical Information Systems (GIS). GIS is computer software that helps scientists to study Earth. GIS is different from earlier space tools. Businesses, schools, and even average people — not just the government —can use it to show them how changes in the planet might affect them.
1.Why do governments study geography according to the passage?
A.To improve the environment. B.To make the land use plan.
C.To make new discoveries. D.To count the crops in a field.
2.Which of the following is true according to the passage?
A.The U.S. satellite program began in 1972. B.Landsat was able to take pictures of other planets.
C.TIROS was successful in giving weather forecasts. D.GIS can only be used by the government.
3.From the passage, we can infer that ________.
A.GIS is the newest computer to study Earth
B.NASA only depends on photos to study Earth
C.satellite pictures can give more detailed information
D.recent U.S. satellites are as advanced as the old ones
九年级英语阅读单选中等难度题查看答案及解析
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Geography is the study of Earth and its climates. Scientists use it to study global warming and track the weather. Governments use it to learn where people live and work and to plan what to do with the land. It is now easier than ever to use geography because of a science called space technology.
The United States launched its first satellite in 1958. Some space missions that followed were geographical studies. In fact, earth science is a big part of the work of the National Aeronautics and Space Administration (NASA).
Astronauts looked out of the space shuttle. They decided to take photographs of Earth from their vantage point. Over the years, picture quality improved. Shuttle photography now shows land features, such as rivers. It can even show the streets of large cities. Photos of the same places at different times show how the land is changing.
NASA does not use just photographs, though. In 1958 it launched TIROS (the Television Infrared Observation Satellite). This first use of a satellite to study Earth was effective in giving weather forecasts. It led to the creation of new space tools to use in geography.
The Landsat Program began in 1972. This satellite sent detailed views of Earth from space. The pictures were so precise that scientists could count the number and kinds of crops in a field. Landsat showed where Earth’s surface had faults along which earthquakes might happen. This information helped in the planning of new cities and factories. Landsat also made discoveries. In Antarctica it located ranges of unknown mountains. It pinpointed small lakes in Virginia that were no ton maps. Landsat, now more advanced, still flies today.
Another space tool is Earth Observing-1 (EO-1). This spacecraft flies right behind Landsat. It takes pictures of the same sites. The two sets of pictures, viewed together, show how cities grow and how other places, such as rain forests, become smaller over time. This helps scientists learn how people affect geography.
One of the newest space tools is the Geographical Information Systems (GIS). GIS is computer software that helps scientists to study Earth. GIS is different from earlier space tools. Businesses, schools, and even average people — not just the government —can use it to show them how changes in the planet might affect them.
1.Why do governments study geography according to the passage?
A. To improve the environment.
B. To make the land use plan.
C. To make new discoveries.
D. To count the crops in a field.
2.Which of the following is true according to the passage?
A. The U.S. satellite program began in 1972.
B. Landsat was able to take pictures of other planets.
C. TIROS was successful in giving weather forecasts.
D. GIS can only be used by the government.
3.EO-1 takes photographs of the same places as Landsat because __________.
A. the two groups of pictures can show the changes of Earth
B. EO-1 is practicing for future photography missions
C. Landsat is out of date and new pictures are needed
D. Landsat can’t send detailed views of Earth from space
4.From the passage, we can infer that ___________.
A. GIS is the newest computer to study Earth
B. NASA only depends on photos to study Earth
C. satellite pictures can give more detailed information
D. recent U.S. satellites are as advanced as the old ones
九年级英语阅读理解困难题查看答案及解析
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Garry Golden is a futurist. Futurists are scientists who analyze the way the world is today and use that information.to predict what the world will be like in the future. Golden focuses on the study of transportation. He spends his days studying the relationships between cars, subways, and trains. But he's most excited about imagining the way these relationships will change in the future.
Many public transportation supporters dislike big cities because they spend hours driving from one side of the city to the other. And there aren't enough buses and. subways.
However, Golden sees a trend (趋势) toward fewer cars' in the future. He explains, "Cities have a cost of car ownership, which is a challenge. All these vehicles cost the city in services, in having to repair roads and other things. "Cars also take up a lot of space.
Golden points out that having so many parking spaces is wasteful. Much of the time the parking spaces
sit empty. What is the solution?"I think cities will make new laws to limit the number of cars people can have ，" says Golden. "Instead, people will use taxis, subways, and buses. New technology, like smartphones, can make these forms of public transportation even better. Imagine if everyone had a smartphone and used them to signal(发信号) when they wanted to ride the bus. Buses could change their route(路线) to meet people's requests."
How soon would these changes come? Golden admits that it will take several years. Cities can be slow to change. Also, new systems of transportation can be expensive. "But it's coming," he says. "The trend of the empowered city will be here soon. "
The other trend that excites Golden is electric cars. Golden especially believes in the future of electric cars that have sensors(传感器) to understand the world around them. "If we have cars that can communicate with one another, they can adjust speeds to cut down on traffic jams,"he says. Rush hour in big cities would be much less painful.
One challenge is that it is hard to cheaply produce batteries that are strong enough for these cars. But Golden argues we could, also make cars out of strong plastic composites(合成物). The cars would then be much lighter and much cheaper to make.
Golden remains positive about the future. "There are so many exciting developments ，"he says. "In thirty years we will live a different world. "
1.What does Garry Golden mainly study?
A. The changes of future transportation
B. What cars will be like in the future.
C. How the world .is different from today
D. The relationships between cars and people.
2.Why does Golden see a trend toward fewer cars in the future?
A. -Because cities-take up a lot of space.
B. Because cars cost too much of the city
C. Because people prefer to take the subway
D. Because roads are sometimes too crowded.
3.Which of the following statements is true according to Golden?
A. New buses will take the place of cars as a way of transportation.
B. Electric cars with sensors will be able to put an end to traffic jams.
C. Future cars could be lighter because of strong and powerful batteries.
D. Future buses can receive signals and change their routes accordingly:
4.What is Golden's attitude to the future of transportation?
A. Uncertain. B. Worried.
C. Hopeful. D. Careful.
九年级英语阅读理解中等难度题查看答案及解析
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Study or Learn?
English language learners use the verbs “study” and “learn” all the time. Yet, they often are unsure which to choose in a situation. Our subject today comes from Salah of Yemen. The writer asks:
Question:
I would like to know the difference between “study” and “learn.” Thanks!
– Salah, Yemen
Answer:
Hello, Salah, and thanks for your note!
Let’s begin with the dictionary meaning of each word. These are from the Merriam-Webster Learner’s Dictionary:
To study means to read, memorize facts or attend school in order to learn about a subject.
To learn means to gain knowledge or skill by studying, practicing, being taught or experiencing something.
So, studying is just one way of learning. But it is not the only way.
Learn
Sometimes, we learn through experience. For example, if you travel to Thailand, you can visit a lot of sights, try the traditional foods and talk to the local people. By the time you leave, you will have gained a lot of knowledge about the country. So, you can say, “I learned so much about Thailand!”
You could not say, “I studied so much about Thailand!” because your actions did not mainly involve reading, memorizing facts, taking a course, attending school or something similar.
Study
In addition, when you study something, you have not learned it yet.
And, sometimes, you can even study something without learning it. For example, if you say, “I studied English,” it may mean you took English classes. Or maybe you tried to teach yourself through an app or language website.
But maybe you had difficulty with this and still do not know how to speak the language. In that situation, you could not say, “I learned English,” because that would mean you had gained enough knowledge to use it.
Examples
If the difference between “learn” and “study” is not clear yet, here are a few sentences that compare them:
They learned how to write stories in the new writing class.
They spent time studying the techniques of story-writing.
Where did you learn how to bake so well?
Did you study baking in school?
And one last tip for remembering the difference is this expression: “I studied but I did not learn anything.”
And that’s Ask a Teacher. I’m Alice Bryant.
1.Who are often unsure of how to choose “study” or “learn” in a situation?
2.What does study mean from the Merriam-Webster Learner’s Dictionary?
3.When can you say “I learned so much about Thailand”?
4.What do you mean by saying “I studied English”?
5.Which expression can help to remember the difference between “study” and “learn”?
九年级英语回答问题中等难度题查看答案及解析
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Scientists who study the climate are still arguing about how fast the earth is warming and how much it will warm, but they do agree that the earth is warming and that it will keep warming if we don’t do anything about it.
Scientists agree that the burning of fossil fuels (化石燃料) like oil and coal cause greenhouse gases to escape into the air and that these gases are causing most of the warming. Another cause is deforestation (cutting down trees) . Trees soak up carbon dioxide, one of the greenhouse gases, from the air.
There are already some changes happening because of global warming. Sea level is rising and some animals are already moving to new homes. It’s already too late to stop global warming completely.
If the warming gets worse, as scientists expect, there may be some kinds of plants and animals that is disappearing because they can’t move to new homes. There may be more storms and floods. Sea level may rise so much that people have to move away from the coasts. Some areas may become too dry for farming.
Global warming is a very difficult problem to fix. People are having a hard time agreeing on what to do about it. For example, everyone agrees that wasting energy is a bad thing to do. But some people think that the federal government (联邦政府) should make laws about it, while other people think it should be up to each person or business to decide what to do.
Many states and businesses in the United States are not waiting until the federal government decides what to do. They have already started working on the problem.
1.What are the scientists arguing about in the passage?
A. How fast is the earth warming? B. How much will the earth warm?
C. The earth will keep warming if we don’t do anything about it. D. Both A and B.
2.What does the underlined phrase “soak up” mean?
A．take in B．grow up C．take off D．set up
3.What may be the causes of global warming?
A．The disappearance of plants and animals and the wasting energy.
B．The burning of fossil fuels and storms and floods.
C．The burning of fossil fuels and deforestation.
D．The rising of sea level and deforestation.
4.What is the best title of this passage?
A．The reason for global warming B．How to stop global warming
C．The changes to the world D．The global warming
九年级英语阅读理解困难题查看答案及解析