If metal is heated and then cooled very quickly, ________, by dipping in cold water, it will be very hard but will break easily.
| A．what’s more | B．in general | C．for example | D．on the other hand |
高一英语单项填空简单题
If metal is heated and then cooled very quickly, ,put in cold water, it will become very hard but will break easily.
A. if so B. to give an example
C. in other words D. in conclusion
高一英语单项填空简单题查看答案及解析
If metal is heated and then cooled very quickly, ________, by dipping in cold water, it will be very hard but will break easily.
| A．what’s more | B．in general | C．for example | D．on the other hand |
高一英语单项填空简单题查看答案及解析
Annealing is a way of making metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly, for example by dipping (浸) it in water, it will be very hard but also very brittle (脆) —that is , it will break easily. Metal that has been annealed is soft but does not break as easily. It is possible to make metal as hard or as soft as is wished, by annealing it. The metal is heated, and allowed to cool slowly for a certain length of time. The longer the heated metal takes to cool slowly, the softer it becomes. Annealing can also be used on other materials, such as glass.
1. Annealing can make metal ________
A. hard and tough (韧). B. hard but brittle.
C. soft but tough. D. soft and brittle.
2.Why do people put hot metal in water?
A. To make it hard. B. To make it soft.
C. To make it cool. D. To make it brittle.
3.As suggested by the text, how can glass be made less brittle?
A. It can be heated and then cooled quickly.
B. It can be cooled and then heated slowly.
C. It can be heated and then cooled slowly.
D. It can be cooled and then heated quickly.
高一英语阅读理解中等难度题查看答案及解析
Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, give light, and transport people and products from place to place. Most energy comes from fossil fuels—petroleum, coal, and natural gas. However, burning fuels causes pollution. Also, if we don’t find new kinds of energy, we will use up all the fossil fuels in the twenty-first century. Scientists are working hard to find other kinds of energy for the future. What might these sources of energy be?
Energy from the wind
All over the world, people use the power of the wind. It turns windmills and moves sailboats. It is a clean source of energy, and there is lots of it. Unfortunately, if the wind does not blow, there is no wind energy.
Energy from water
When water moves from a high place to a lower place, it makes energy. This energy is used to create electricity. In Brittany, France, for example, waterpower produces enough energy to light a town of 40,000people. Waterpower gives energy without pollution. However, people have to build dams to use this energy. Dams cost a lot of money, so water energy is expensive.
Energy from the earth
There is heat in rocks under the earth. Scientists use this heat to make geothermal energy. San Francisco gets half of the energy it needs from geothermal power. This kind of energy is cheap, but it is possible only in a few places in the world.
Energy from the sun
Solar panels on the roofs of houses can turn energy from the sun into electricity. These panels can create enough energy to heat an entire house. Solar power is clean and there is a lot of it in sunny places. But when the weather is bad, there is no sunlight for energy.
1.What does this passage mainly talk about?
A．Advantage of the energy from nature.
B．The future of the energy.
C．Scientists have been working hard to research other kinds of energy.
D．energy is the most important power in the word.
2.From the first paragraph we know ______.
A．energy can do everything for people
B．all the energy causes pollution
C．the new kinds of energy are badly needed
D．scientists have found other kinds of energy for the future
3.What is the writer’s opinion about the energy?
A．Try to use water energy more though it costs a lot.
B．Each natural energy has its own advantages and disadvantages.
C．Solar power is environmental.
D．Wind power is the cheapest but we can’t get.
4.What can be inferred from the passage?
A．In order to protect our environment, we should try other kinds of energy.
B．All scientists in the world will unite to find energy.
C．People in modern life use energy every day.
D．Energy changes people’s lives.
高一英语阅读理解中等难度题查看答案及解析
Energy is very important in modern life. People use energy to run machines, heat and cool their homes, cook, give light, and transport people and products from place to place. Most energy comes from fossil fuels—petroleum, coal, and natural gas. However, burning fuels causes pollution. Also, if we don’t find new kinds of energy, we will use up all the fossil fuels in the twenty-first century. Scientists are working hard to find other kinds of energy for the future. What might these sources of energy be?
Energy from the wind
All over the world, people use the power of the wind. It turns windmills and moves sailboats. It is a clean source of energy, and there is lots of it. Unfortunately, if the wind does not blow, there is no wind energy.
Energy from water
When water moves from a high place to a lower place, it makes energy. This energy is used to create electricity. In Brittany, France, for example, waterpower produces enough energy to light a town of 40,000people. Waterpower gives energy without pollution. However, people have to build dams to use this energy. Dams cost a lot of money, so water energy is expensive.
Energy from the earth
There is heat in rocks under the earth. Scientists use this heat to make geothermal energy. San Francisco gets half of the energy it needs from geothermal power. This kind of energy is cheap, but it is possible only in a few places in the world.
Energy from the sun
Solar panels on the roofs of houses can turn energy from the sun into electricity. These panels can create enough energy to heat an entire house. Solar power is clean and there is a lot of it in sunny places. But when the weather is bad, there is no sunlight for energy.
1.What does this passage mainly talk about?
A．Advantage of the energy from nature.
B．The future of the energy.
C．Scientists have been working hard to research other kinds of energy.
D．Energy is the most important power in the word.
2.From the first paragraph we know ______.
A．energy can do everything for people
B．all the energy causes pollution
C．the new kinds of energy are badly needed
D．scientists have found other kinds of energy for the future
3.What is the writer’s opinion about the energy?
A．Try to use water energy more though it costs a lot.
B．Each natural energy has its own advantages and disadvantages.
C．Solar power is environmental.
D．Wind power is the cheapest but we can’t get.
4.What can be inferred from the passage?
A．In order to protect our environment, we should try other kinds of energy.
B．All scientists in the world will unite to find energy.
C．People in modern life use energy every day.
D．Energy changes people’s lives.
高一英语阅读理解中等难度题查看答案及解析
单词拼写（共10小题，每小题1分，满分10分）
1.Some metals expand when it is hot and c_____ when it is cold.
2.If you a____ a little salt to the soup, it will taste more delicious.
3.Everyone can get on well with him, because he is easy to________(接近).
4.They are making a _______ (调查） of the population growth of the city.
5.While I was doing my homework, the ______(电） went off.
6.Water is a _______ (液体）without color or taste.
7.Children should be ____(独立的）in doing things and don't always rely on their parents.
8.I______(集中）your mind on study, and you'll make progress.
9.What is the ______(平均的）rainfall for summer in your country.
10.Nowadays many old people don't like living d______ ,for it is very noisy.
高一英语单词拼写中等难度题查看答案及解析
Lily is so shy that whenever she is introduced to strangers, she always at them quickly and then looks down at the ground.
A. stares B. glances
C. laughs D. points
高一英语单项填空中等难度题查看答案及解析
Swimming is very popular. People like swimming in summer because water makes people feel cool. If you like swimming and swim in a wrong place, it may not be safe. These years, a lot of people died when they were enjoying themselves in the water, and most of them were students. But some people are not careful in swimming. They often think they swim so well that nothing will happen to them in water. Summer is here again. If you go swimming in summer, don't forget that better swimmers have died in water. They died because they were not careful not because they could not swim. So don't get into water when you are alone. If there is a "No Swimming" sign, don't get into water. If you remember these, swimming will be safer.
1.People like to swim in summer because ______.
A. it makes them strong B. they are free
C. they feel cool in water D. it is safe
2.Some swimmers die in water because ______.
A. they think they can swim well B. they are not strong enough
C. they are not careful D. they like swimming very much.
3.The writer wants to tell us ______.
A. that we must be careful in swimming B. that we should go swimming in summer
C. that swimming is a good sport D. that swimming is not safe
高一英语阅读理解中等难度题查看答案及解析
______ another button and your meal is prepared and heated for you.
A. If you press B. To press C. Press D. Pressing
高一英语单项填空中等难度题查看答案及解析
______ another button and your meal is prepared and heated for you.
| A．If you press | B．To press | C．Press | D．Pressing |
高一英语单项填空简单题查看答案及解析