Scientists may have found a way to reduce sho...

Scientists may have found a way to reduce shortage of type O blood. Type O is the kind of blood that hospitals most often need. What the researchers are testing is an easier way to make type O blood out of other kinds of blood.

There are four main kinds of blood. Most people born with one of these four: Type A,Type B, Type AB or Type O. Type O can be safely given to anyone. So it is commonly used when a person is injured or sick and has to have blood.

The differences among blood types are linked to whether or not red blood cells contain certain kinds of sugar molecules(分子). These molecules are found on the surface of the cells.They are known as antigens (抗原). These antigens are found with type A, B and AB blood but not with type O.

More than twenty-five years ago, scientists found that the antigens could be removed to create what they called universal-type cells. They could be removed with chemicals called enzymes(酶). But large amounts of enzymes were required to make the change.

Doctor Henrik Clausen of the University of Copenhagen in Denmark led the study. The next step, he says, is to complete safety tests. The team is working with the American company ZymeQuest to test the new method. If it meets safety requirements(*k)and is not too costly,it could become a widely used life-saving tool to increase the supply of universal blood.

1.How do scientists deal with the problem of lacking type O blood?

A.Hope more people to donate type O blood.

B.Make the most of the present type O blood.

C.Develop new ways of using type O blood.

D.Make type O blood out of other kinds of blood.

2.What make people have different kinds of blood?

A.Sugar molecules in red blood cells.

B.People's different living conditions.

C.Peoples various immune systems.

D.The variety of peoples cells and genes.

3.What can we infer from the text?

A.Type O blood can be safely given to anyone

B.Antigens could easily be removed to create universal blood.

C.A Danish company wanted to involve itself in studying blood.

D.The new method is not safe enough to be put into use in hospitals now.

4.What is the best title for the text?

A.Four different kinds of blood

B.A new way to make type O blood

C.The latest research on blood type

D.Find the proper type of blood

高一英语阅读理解中等难度题查看答案及解析

China is going green．In order to reduce air pollution and oil shortages, carmakers have announced their plans to develop hybrid vehicles (混合燃料汽车) for the Chinese market．Toyota’s hybrid car Prius will be ready to drive in China this week．Let’s have a look at the new car．

Any vehicle is a hybrid run on a rechargeable battery and gas．Hybrid cars have special engines, which are smaller than traditional gas engines．The gasoline engine provides 99 percent of the power when the car is going at a steady speed. A specially designed battery motor provides extra power for running up hills or when it needs to speed up．

Step into a Prius, and turn on the engine．The first thing you notice is that it is quieter than a traditional car．At this point, the car’s gas engine is at rest．The electric motor will provide power until the car reaches about 24km/h．If you stay at a low speed, you are effectively driving an electric car, with no gas being used, and no waste gas given off．

The computer decides when to use the gas engine, when to go electric, and when to use a combination of the two．If you go over 24km/h, when you step on the gas pedal (油门), you are telling the computer how fast you want to go．

The electric motor recharges automatically using a set of batteries．And when driving at a high speed, the gas engine not only powers the car but also recharges the batteries．When you use the brake, the electric motor in the wheels will work like a generator (发电机) to produce electricity to recharge the batteries．As a result, the car’s batteries will last for around 200,000 miles．

66．The underlined sentence probably means ________.

A．there will be more and more green land in China

B．China’s new cars are combinations of different green models

C．China is still young and lacking in experience

D．the environment is getting better in China

67. What is the most important feature of hybrid cars?

A. They are powered by both a rechargeable battery and gas.

B. They have smaller engines than traditional gas ones.

C. They only use 99 percent of their power to run up hill.

D. They are much quieter than traditional cars.

68. We can know from the story that ________.

A. the gas engine recharges the batteries as well as powering the car

B. using the brake suggests that the gas engine should work

C. the car’s batteries will last for around 200,000 miles without being recharged

D. the batteries can be recharged at any time you want

69. The author writes the passage mainly to________.

A. announce plans to develop hybrid vehicles for the Chinese market

B. let people know how to save their gas when driving a car

C. teach people how to drive a hybrid car

D. introduce a new kind of “green” car

70．Which of the following statements is TRUE according to the text?

A．The hybrid car is environmentally friendly．

B．The hybrid car is unable to get itself recharged．

C．The hybrid car has been made in mass．

D．The hybrid car can decide what power to use

高一英语阅读理解简单题查看答案及解析

B

China is going green．In order to reduce air pollution and oil shortages, carmakers have announced their plans to develop hybrid vehicles (混合燃料汽车) for the Chinese market．Toyota’s hybrid car Prius will be ready to drive in China this week．Let’s have a look at the new car．

Any vehicle is a hybrid run on a rechargeable battery and gas．Hybrid cars have special engines, which are smaller than traditional gas engines．The gasoline engine provides 99 percent of the power when the car is going at a steady speed. A specially designed battery motor provides extra power for running up hills or when it needs to speed up．

Step into a Prius, and turn on the engine．The first thing you notice is that it is quieter than a traditional car．At this point, the car’s gas engine is at rest．The electric motor will provide power until the car reaches about 24km/h．If you stay at a low speed, you are effectively driving an electric car, with no gas being used, and no waste gas given off．

The computer decides when to use the gas engine, when to go electric, and when to use a combination of the two．If you go over 24km/h, when you step on the gas pedal (油门), you are telling the computer how fast you want to go．

The electric motor recharges automatically using a set of batteries．And when driving at a high speed, the gas engine not only powers the car but also recharges the batteries．When you use the brake, the electric motor in the wheels will work like a generator (发电机) to produce electricity to recharge the batteries．As a result, the car’s batteries will last for around 200,000 miles．

66．The underlined sentence probably means ________.

A．there will be more and more green land in China

B．China’s new cars are combinations of different green models

C．China is still young and lacking in experience

D．the environment is getting better in China

67. What is the most important feature of hybrid cars?

A. They are powered by both a rechargeable battery and gas.

B. They have smaller engines than traditional gas ones.

C. They only use 99 percent of their power to run up hill.

D. They are much quieter than traditional cars.

68. We can know from the story that ________.

A. the gas engine recharges the batteries as well as powering the car

B. using the brake suggests that the gas engine should work

C. the car’s batteries will last for around 200,000 miles without being recharged

D. the batteries can be recharged at any time you want

69. The author writes the passage mainly to________.

A. announce plans to develop hybrid vehicles for the Chinese market

B. let people know how to save their gas when driving a car

C. teach people how to drive a hybrid car

D. introduce a new kind of “green” car

70．Which of the following statements is TRUE according to the text?

A．The hybrid car is environmentally friendly．

B．The hybrid car is unable to get itself recharged．

C．The hybrid car has been made in mass．

D．The hybrid car can decide what power to use

高一英语阅读理解简单题查看答案及解析

首字母填空

1.With the help of the Cassini　 spacecraft,　 NASA scientists　 have found e _____ to prove that chemical reactions (反应) are taking place deep below the surface of Enceladus, Saturn’s (土星) sixth largest moon.

2.A　 report said wealthier families tended to create more chances to help their children a _____ skills valued

by the labor market.

3.Whether in p _____ metropolises (大都市), or in remote (偏远的) countryside, every kid is supposed to be provided equal educational opportunities.

4.In　 a　 digital world, d _____ the convenience modern technology brings, paper books are still valued by many people.

5.A new study suggested that having people think of you as constantly busy and needed at work is a far better way to show off social s _____.

6.We really shouldn’t have bought this house, because it will cost far more than we can afford to r _____ it. We didn’t realize what a bad state it’s in until we moved in.

7.The car’s i _____ is very impressive --- wonderful leather seats and a wooden dashboard (仪表盘).

8.The Grammy Awards is truly an award for artistic achievement, not just sales or chart position. It is recognizedas one of the most p _____ awards in field of music.

9.In the extremely heavy storm last week, many car owners were o _____ to abandon (放弃) their cars and evacuate (撤离) on foot.

10.We got so wet in the heavy rain that our clothes c _____ to us. It was really uncomfortable.

11.Even　 though　 this　 area　 was　 seriously　 damaged　 during　 an　 earthquake, the　 r _____ of a 12th century monastery (修道院) can still be seen on the site.

12.The shop said they could replace the newly bought air-conditioner for free as it was still under g _____.

13.After weeks at sea, it was wonderful to feel firm ground b _____ our feet once more.

14.Whatever happens, don’t sign any c _____ before you have examined its terms and conditions in detail.

15.In fact, Santa has an official in Lapland where he greets visitors all year round. But as it happens, people known more about Santa than the country he comes from --- Finland, a nation of o _____ natural beauty.

高一英语单词拼写中等难度题查看答案及解析

A healthy amount of sunshine may be the secret to staying young. British scientists have discovered.

Vitamin D is produced naturally by the skin in response to (对…的反应) sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres-a biological marker of ageing found in DNA. As people get older, their telomeres get shorter and they become more susceptible (易受伤害的) to certain illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres-a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said, "These results are exciting because they show for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D." This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."

Professor Tim Spector, a co-author of the report, added, " Although it might sound absurd(荒唐的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process.

Vitamin D made by the action of sunlight on the skin accounts for 90 percent of the body's supply, but lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

1.A certain amount of sunshine helps people stay young because _________.

A. people feel happy and energetic in the sun

B. vitamin D may help to slow the ageing process

C. sunshine protects people against heart disease

D. vitamin D makes one's skin look young and healthy

2.From Brent Richards, we know that ________.

A. sunlight causes skin cancer to people with high level of vitamin D

B. the study generally has a healthy effect on the general ageing process

C. the higher levels of vitamin D people have, the more slowly people may age

D. vitamin D can only be got from fish, eggs and breakfast cereals

3.What can we infer from the passage?

A. Sunlight does more good than harm to our health.

B. Telomeres are important as they are signs of ageing of the DNA.

C. Sunlight can be dangerous as it causes skin cancer.

D. Vitamin D can also be gained from food.

4.What is the best title of the passage?

A. Secret of Staying Young

B. Sunlight and Vitamin D

C. Vitamin D Helps Slow Ageing

D. Sunlight and Health

高一英语阅读理解中等难度题查看答案及解析

A healthy amount of sunshine may be the secret to staying young. British scientists have discovered.

Vitamin D is produced naturally by the skin in response to(对…的反应) sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King’s College London studied 2,160 women aged between 18 and 79, looking at their telomeres--- a biological marker of ageing found in DNA. As people get older, their telomeres get shorter and they become more susceptible(易受伤害的) to certain illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres--- a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said, “These results are exciting because they show for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D.” This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer.”

Professor Tim Spector, a co-author of the report, added, “Although it might sound absurd

(荒唐的), it’s possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process.”

Vitamin D made by the action of sunlight on the skin accounts for 90 percent of the body’s supply, but lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

1. A certain amount of sunshine helps people stay young because _____.

A. people feel happy and energetic in the sun

B. sunshine protects people against heart disease

C. vitamin D makes one’s skin look young and healthy

D. vitamin D may help to slow the ageing process

2.From Brent Richards, we know that _____.

A. sunlight causes skin cancer to people with high level of vitamin D

B. the study generally has a healthy effect on the general ageing process

C. vitamin D can only be got from fish, eggs and breakfast cereals

D. the higher levels of vitamin D people have, the more slowly people may age

3.What can we infer from the passage?

A. Telomeres are important signs of ageing of the DNA.

B. Sunlight can be dangerous as it causes skin cancer.

C. Sunlight does a great deal of good to our health.

D. Vitamin D can also be gained from food.

4. What is the best title of the passage?

A. Secret of Staying Young                  B. Vitamin D Helps Slow Ageing

C. Sunlight and Vitamin D                   D. Sunlight and Health

高一英语阅读理解中等难度题查看答案及解析

A healthy amount of sunshine may be the secret to staying young. British scientists have discovered.

Vitamin D is produced naturally by the skin in response to(对…的反应) sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King’s College London studied 2,160 women aged between 18 and 79, looking at their telomeres--- a biological marker of ageing found in DNA. As people get older, their telomeres get shorter and they become more susceptible(易受伤害的) to certain illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres--- a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said, “These results are exciting because they show for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D.” This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer.”

Professor Tim Spector, a co-author of the report, added, “ Although it might sound absurd(荒唐的), it’s possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process.

Vitamin D made by the action of sunlight on the skin accounts for 90 percent of the body’s supply, but lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

1.A certain amount of sunshine helps people stay young because _________.

A. vitamin D may help to slow the ageing process

B. sunshine protects people against heart disease

C. vitamin D makes one’s skin look young and healthy

D. people feel happy and energetic in the sun

2.From Brent Richards, we know that ________.

A. sunlight causes skin cancer to people with high level of vitamin D

B. the higher levels of vitamin D people have, the more slowly people may age

3.What can we infer from the passage?

A. Telomeres are important as they are signs of ageing of the DNA.

B. Sunlight can be dangerous as it causes skin cancer.

C. Sunlight does more good than harm to our health.

D. Vitamin D can only be gained from food.

高一英语阅读理解中等难度题查看答案及解析

For thousands of years，we have looked for ways to measure time. Early humans found that the regular movements of the sun，the earth，the moon，and the stars made good ways to measure time. The rising and setting of the sun were used to distinguish day from night.

But，eventually，people needed to tell time more accurately，or exactly. So，by using the sun’s position in the sky，they divided the day into dawn，morning，midday and evening.

Then it was noted that the sun cast a changing shadow as it moved across the sky. Time could be told more accurately by setting up a stick and marking the positions of the sun’s shadow. It was the ancient Greeks who divided each position of this “sundial(日晷)” into hours.

But the sun doesn’t always shine. So，for the past 6,000 years，many other ways of keeping time have been tried. Slow­burning candles were divided into hours，and the hourglass was invented. When all the sand in the top of an hourglass has shifted to the bottom，an hour has passed.

Later，the pendulum(摆钟)，with its regular back­and­forth movement of weights，was used to move the hands on a clock. Pendulums are still used in grandfather clocks.

Today，even more accurate clocks are in use，such as battery­operated quartz clocks（石英钟），digital clocks，and clocks run by electrical tuning forks and tiny atoms. These atomic clocks are the most accurate clocks ever invented. The exact time can be kept to within 1 second a century.

1.Humans in the old days used ________ to tell day from night.

A．the rising and setting of the sun

B．battery­operated quartz clocks

C．atomic clocks

D．digital clocks

2.A sundial works by ________.

A．tracking the movement of the stars around the sun

B．marking a shadow cast by the moving sun

C．burning candles in the sunlight

D．watching the stars

3.Which of the following was NOT used in the past to measure time?

A．An hourglass.　　　　　　　　　　 B．A sundial.

C．Digital clocks.　 　　　　　　　　　 D．A pendulum.

4.Which of the following ways of measuring time is ordered from the least accurate to the most accurate?

A．Sundial，pendulum，sun.

B．Atomic clock，quartz clock，sundial.

C．Sun，pendulum，atomic clock.

D．Digital clock，hourglass，slow­burning candles.

高一英语阅读理解中等难度题查看答案及解析

For thousands of years, we have looked for ways to measure time. Early humans found that the regular movements of the sun, the earth> the moon, and the stars made good ways to measure time. The rising and setting of the sun were used to distinguish (辨别) day from night.

But, eventually, people needed to tell time more accurately, or exactly. So, by using the sun’s position in the sky, they divided the day into dawn, morning, midday and evening.

Then it was noted that the sun cast a changing shadow as it moved across the sky. Time could be told more accurately by setting up a stick and marking the positions of the sun’s shadow. It was the ancient Greeks who divided each position of this “sundial (日晷)” into hours.

But the sun doesn’t always shine. So, for the past 6,000 years, many other ways of keeping time have been tried. Slow-burning candles were divided into hours, and the hourglass was invented. When all the sand in the top of an hourglass has shifted to the bottom, an hour has passed.

Later, the pendulum (摆钟), with its regular back-and-forth movement of weights, was used to move the hands on a clock. Pendulums are still used in grandfather clocks.

Today, even more accurate clocks are in use, such as battery-operated quartz clocks (石英钟), digital clocks, and clocks run by electrical tuning forks and tiny atoms. These atomic clocks are the most accurate clocks ever invented. The exact time can be kept to within 1 second a century.

1.Humans in the old days used 　　　　 to tell day from night.

A. the rising and setting of the sun

B. battery-operated quartz clocks

C. atomic clocks

D. digital clocks

2.A sundial works by 　　　　 .

A. tracking the movement of the stars around the sun

B. marking a shadow cast by the moving sun

C. burning candles in the sunlight

D. watching the stars

3.Which of the following was NOT used in the past to measure time?

A. An hourglass.　　 B. A sundial.

C. Digital clocks.　　 D. A pendulum.

4.Which of the following ways of measuring time is ordered from the least accurate to the most accurate?

A. Sundial, pendulum, sun.

B. Atomic clock, quartz clock, sundial.

C. Sun, pendulum, atomic clock.

D. Digital clock, hourglass, slow-burning candles.

高一英语阅读理解中等难度题查看答案及解析

The government has taken some measures to solve the shortage of water, but it may be some time __　　　　　 the situation improves.

A．since　　 B．when.　　 C．unless.　　 D．before.

高一英语单项填空中等难度题查看答案及解析