The health of millions could be at risk because supplies of medicinal plants are being used up. These plants are used to make traditional medicine, including drugs to fight cancer. “The loss of medicinal plants is a quiet disaster,” says Sara Oldfield, secretary general of the NGO Botanic Gardens Conservation International.
Most people worldwide rely on herbal (药草制的) medicines which are got mostly from wild plants. But some 15,000 of the 50,000 medicinal species are under threat of dying out, according to report from the international conservation group Plantlife. Shortages have been reported in China, India, Kenya, Nepal, Tanzania and Uganda.
Over-harvesting does the most harm, though pollution and competition from invasive species (入侵物种) and habitat destruction all contribute. “Businessmen generally harvest medicinal plants, not caring about sustainability (可持续性),” the Plantlife report says, “damage is serious partly because they have no idea about it, but it is mainly because such collection is unorganized.” Medicinal trees at risk include the Himalayan yew (紫衫) and the African cherry, which are used to treat some cancers.
The solution, says the report’s author, Alan Hamilton, is to encourage local people to protect these plants. Ten projects studied by Plantlife in India, Pakistan, China, Nepal, Uganda and Kenya showed this method can succeed. In Uganda, the project has kept a sustainable supply of low-cost cancer treatments, and in China a public-run medicinal plant project has been created for the first time.”
“Improving health, earning an income and keeping cultural traditions are important in encouraging people to protect medicinal plants,” says Hamilton, “You have to pay attention to what people are interested in.”
Ghillean Prance, the former director of the Royal Botanic Gardens at Kew in London, agrees that medicinal plants are in need of protection. “Not nearly enough is being done,” he told New Scientist. “We are destroying the very plants that are of most use to us.”
1.From the first two paragraphs, we can learn that ________.
A. millions of people are threatened with-cancer
B. most countries see a shortage of herbal medicines
C. about two thirds of medicinal species will disappear
D. a number of medicinal species are in danger of extinction
2.The major factor that causes the decreasing of supplies of medicinal plants is ________.
A. pollution B. habitat destruction
C. over-harvesting D. invasive species
3.The underlined word “it” in Paragraph 3 refers to ________.
A. over-harvesting B. sustainability
C. other species’ invasion D. pollution
4.What can be inferred from the passage?
A. Protecting medicinal plants has a long way to go.
B. Ghillean Prance is optimistic about medicinal plants’ future.
C. Local people don’t know how to protect medicinal plants.
D. China has made great progress in protecting medicinal plants.
5.Which of the following is the best title of the passage?
A. Low-cost Cancer Treatment
B. The Importance of Sustainability
C. Medicinal Plants on Verge of Extinction
D. Sustainable Development of the Environment
高三英语阅读理解困难题
The health of millions could be at risk because supplies of medicinal plants are being used up. These plants are used to make traditional medicine, including drugs to fight cancer. “The loss of medicinal plants is a quiet disaster,” says Sara Oldfield, secretary general of the NGO Botanic Gardens Conservation International.
Most people worldwide rely on herbal (药草制的) medicines which are got mostly from wild plants. But some 15,000 of the 50,000 medicinal species are under threat of dying out, according to report from the international conservation group Plantlife. Shortages have been reported in China, India, Kenya, Nepal, Tanzania and Uganda.
Over-harvesting does the most harm, though pollution and competition from invasive species (入侵物种) and habitat destruction all contribute. “Businessmen generally harvest medicinal plants, not caring about sustainability (可持续性),” the Plantlife report says, “damage is serious partly because they have no idea about it, but it is mainly because such collection is unorganized.” Medicinal trees at risk include the Himalayan yew (紫衫) and the African cherry, which are used to treat some cancers.
The solution, says the report’s author, Alan Hamilton, is to encourage local people to protect these plants. Ten projects studied by Plantlife in India, Pakistan, China, Nepal, Uganda and Kenya showed this method can succeed. In Uganda, the project has kept a sustainable supply of low-cost cancer treatments, and in China a public-run medicinal plant project has been created for the first time.”
“Improving health, earning an income and keeping cultural traditions are important in encouraging people to protect medicinal plants,” says Hamilton, “You have to pay attention to what people are interested in.”
Ghillean Prance, the former director of the Royal Botanic Gardens at Kew in London, agrees that medicinal plants are in need of protection. “Not nearly enough is being done,” he told New Scientist. “We are destroying the very plants that are of most use to us.”
1.From the first two paragraphs, we can learn that ________.
A. millions of people are threatened with-cancer
B. most countries see a shortage of herbal medicines
C. about two thirds of medicinal species will disappear
D. a number of medicinal species are in danger of extinction
2.The major factor that causes the decreasing of supplies of medicinal plants is ________.
A. pollution B. habitat destruction
C. over-harvesting D. invasive species
3.The underlined word “it” in Paragraph 3 refers to ________.
A. over-harvesting B. sustainability
C. other species’ invasion D. pollution
4.What can be inferred from the passage?
A. Protecting medicinal plants has a long way to go.
B. Ghillean Prance is optimistic about medicinal plants’ future.
C. Local people don’t know how to protect medicinal plants.
D. China has made great progress in protecting medicinal plants.
5.Which of the following is the best title of the passage?
A. Low-cost Cancer Treatment
B. The Importance of Sustainability
C. Medicinal Plants on Verge of Extinction
D. Sustainable Development of the Environment
高三英语阅读理解困难题查看答案及解析
The health of millions could be at risk because medicinal plants are being used up.These plants are used to make traditional medicine，including drugs to fight cancer.“The loss of medicinal plants is a quiet disaster，”says Sara Oldfield，secretary general of the NGO Botanic Gardens Conservation International.
Most people worldwide (including 80 percent of all Africans)rely on herbal medicines(草药)which are got mostly from wild plants.But some 15,000 of the 50,000 medicinal species are under threat of dying out，according to a report from the international conversation group Plantlife.Shortages have been reported in China，India，Kenya，Nepal，Tanzania and Uganda.
Overharvesting does the most harm，though pollution and competition from invasive(侵略性的)species are both responsible.“Businessmen generally harvest medicinal plants，not caring about sustain ability，”the Plantlife report says.“Damage is serious partly because they have no idea of it，but it is mainly because such collection is unorganized.” Medicinal trees at risk include the Himalayan yew and the African cherry，which are used to treat some cancers.
The solution，says the report's author，Alan Hamilton，is to encourage local people to protect these plants.Ten projects studied by Plantlife in India，Pakistan，China，Nepal，Uganda and Kenya showed this method can succeed.In Uganda the project has kept a sustainable supply of lowcost cancer treatments，and in China a public run medicinal plant project has been created for the first time.
“Improving health，earning an income and keeping cultural traditions are important in encouraging people to protect medicinal plants，”says Hamilton.“You have to pay attention to what people are interested in.” Ghillean Prance，the former director of the Royal Botanic Gardens at Kew in London，agrees that medicinal plants are in need of protection.
“Not nearly enough is being done，”he told New Scientist.“We are destroying the very plants that are of most use to us.”
1.What is the passage mainly about?
A．The function of medicinal plants.
B．The importance of traditional medicine.
C．More and more people rely on herbal medicines.
D．The dangerous situation of medicinal plants and ways of protecting them.
2.Which of the following is TRUE according to the passage?
A．About 30% of medicinal species are at risk of dying out.
B．Medicinal plants are mainly used to treat cancers.
C．80% of African countries are reported to be short of medicinal plants.
D．The problem of the loss of medicinal plants appeared suddenly.
3.What contributes most to the loss of medicinal plants?
A．A lack of knowledge of sustainability.
B．Invasion by other species.
C．Environmental pollution.
D．Improper harvesting.
4.What is a useful method of protecting medicinal plants?
A．Improving people's health.
B．Letting people earn more.
C．Working together with the government.
D．Persuading the locals to protect them.
高三英语阅读理解中等难度题查看答案及解析
Millions of teenagers are in danger of putting their health at risk by getting hooked on e-cigarettes, experts warn. Leading health researchers say they are “very concerned” by the growing number of youngsters trying the devices.
Ecigarettes have been marketed as a healthier alternative to smoking conventional cigarettes. But previous research shows ecigarettes generate poisonous chemicals similar to those found in tobacco and may harm the lungs and immune system.
Worryingly, researchers at Liverpool University discovered 16% of teenagers who have used ecigarettes had never previously smoked. The experts also found ecigarettes were “strongly related” to drinking among teenagers. Study author Prof. Mark Bellis said, “Our research suggests that we should be very concerned about teenagers accessing ecigarettes. While debate on ecigarettes has focused largely on whether or not they act as a gateway to tobacco cigarette use, ecigarettes themselves contain a highly addictive drug that may have more serious and longer lasting impacts on children because their brains are still developing.”
Researchers surveyed 16,000 students aged 14 to 17 in the North West of England and asked them about their alcohol and tobacco use. They found that one in five answered yes to the question: “Have you ever bought or tried electronic cigarettes?” More males than females said they had.
Of the teenagers that had accessed ecigarettes, 16% had never smoked, 23% had tried smoking, 12% only smoked when drinking, and 14% were exsmokers. The research also found teenagers who drank alcohol were significantly more likely to have accessed ecigarettes than nondrinkers.
Among those who had never smoked, it was found that those who regularly have excessive(过多的)drinking were four times more likely to access ecigarettes than those who never drink. In all of those that drink, regardless of smoking status, ecigarette access was associated with excessive drinking and involvement with violence after drinking. The researchers said their findings suggest that teenagers who use ecigarettes are most susceptible to other forms of substance use and risktaking behaviors.
1.How have ecigarettes been promoted in the market?
A. As a healthier substitute for traditional cigarettes.
B. As a device meeting the mental needs of smokers.
C. As a product preventing smokers from using tobacco products.
D. As a new device promoted among youngsters.
2.What do we learn from the survey made in the North West of England?
A. E-cigarettes are now widely available and heavily promoted.
B. Ecigarette access is linked to excessive drinking and violence after it.
C. Teenagers are very knowledgeable about alcohol and tobacco use.
D. The number of adult cigarette smokers is dropping at present.
3.Which of the following can replace the underlined words “susceptible to” in the last paragraph?
A. greatly interested in
B. commonly accustomed to
C. deeply disappointed at
D. easily influenced by
4.What's the main idea of the passage?
A. Experts are concerned about excessive drinking in teenagers.
B. The harm of the ecigarettes is greater than that of alcohol.
C. Teenagers are in danger of risking their health on ecigarettes.
D. Researchers are aware of smokerelated health harm.
高三英语阅读理解困难题查看答案及解析
If your job requires a lot of sitting, you could be putting your health at danger.
The American Journal of Epidemiology (流行病学) did a study in 2010 on the correlation (相互联系) between sitting and an individual's physical health. In the study, 53,440 working men and 69,776 working women were surveyed on their time spent sitting. The subjects were all disease free when employed. The researchers identified 11,307 deaths in men and 7,923 deaths in women during the 14-year follow-up.
The findings: Women who reported sitting for more than six hours per day had an approximately 40 higher all-cause death rate than those who reported less than three hours a day, and men had an approximately 20 higher death rate.
Well, now's a fine time to get this information. But why didn't they tell me this years ago? I would have planned on taking a more active job instead of the sedentary (坐着的) job of an editor.
So what can you do if you have to work for a living at a job that requires a lot of sitting? Here are some ideas:
Take frequent breaks. It is recommended that workers vary activities, change their position, and take short breaks every 20 minutes to rest muscles and increase blood circulation. Get a standing desk. Some studies have shown that working from an upright position may be better for health. The serious fitness people can even purchase a treadmill (跑步机) desk. It only goes about one mile per hour. Have a walking meeting. If your group is kind of small, going for a walk while discussing topics is a good alternative.
1.According to the text, the study in 2010 ______.
A. found men reporting shorter sitting time than women
B. surveyed more men than women on their daily sitting time
C. identified fewer deaths in men than in women during the 14-year follow-up
D. discovered correlation between sitting and physical health in men and in women
2.We can infer from the text that the author did not recommend ______.
A. using a standing desk B. resting one's muscles
C. quitting sedentary jobs D. taking a walk while discussing
3.What does the underlined word "subjects" in Paragraph 2 mean?
A. Things being discussed. B. People being studied.
C. Areas of knowledge being learned. D. Objects being painted.
4.What is the main idea of the text?
A. Your job could be killing you.
B. Working out leads to health risks.
C. Long-time sitting is positively associated with health.
D. A study on sitting time and physical health was completed.
高三英语阅读理解中等难度题查看答案及解析
Experts have been warning ___ of the health risks caused by passive smoking.
A.at a time B.at one time
C.for some time D.for the time
高三英语单项填空中等难度题查看答案及解析
Experts have been warning___of the health risks caused by passive smoking.
| A．at a time | B．at one time |
| C．for some time | D．for the time |
高三英语单项填空中等难度题查看答案及解析
Some colors people see late at night could cause signs of the condition mental health experts call clinical depression(临床抑郁症). That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression.
Doctors use the word clinical depression to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death or suicide.
In the new study, American investigators designed an experiment that exposed hamsters（仓鼠）to different colors. The researchers chose hamsters because they are nocturnal, which means they sleep during the day and are active at night. The animals were separated into four groups. One group of hamsters was kept in the dark during their night-time period. Another group was placed in front of a blue light, a third group slept in front of a white light, while a fourth was put in front of a red light. After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the most depressed animals drank the least amount of water.
Randy Nelson, at Ohio State University, says animals that slept in blue and white light appeared to be the most depressed. “What we saw is that these animals didn’t show any sleep interruptions at all but they did mess up biological clock (生物钟) genes and they did show depressive sign but if they were in the dim red light, they did not.” He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness.
1. From the text we know that ________ made the hamster feel depressed.
A. the amount of the water
B. the colour of the light
C. the loss of pleasure
D. the level of energy
2. What was the purpose of the experiment on hamsters?
A. To show how well they slept.
B. To see how much sugary water they drank.
C. To explain why they liked dark colours.
D. To find out what caused the depression on them.
3.The author explains the clinical depression by _________.
A. reporting an experiment process
B. presenting research data
C. setting down general rules
D. giving his own experience
4.Where can we probably find the text?
A. In a science magazine.
B. In a physics textbook
C. In a tourist guidebook.
D. In an official announcement.
高三英语阅读理解中等难度题查看答案及解析
Some colors people see late at night could cause signs of the condition mental health experts call clinical depression(临床抑郁症). That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression.
Doctors use the word clinical depression to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death or suicide.
In the new study, American investigators designed an experiment that exposed hamsters（仓鼠）to different colors. The researchers chose hamsters because they are nocturnal, which means they sleep during the day and are active at night. The animals were separated into four groups. One group of hamsters was kept in the dark during their night-time period. Another group was placed in front of a blue light, a third group slept in front of a white light, while a fourth was put in front of a red light. After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the most depressed animals drank the least amount of water.
Randy Nelson, at Ohio State University, says animals that slept in blue and white light appeared to be the most depressed. “What we saw is that these animals didn’t show any sleep interruptions at all but they did mess up biological clock (生物钟) genes and they did show depressive sign but if they were in the dim red light, they did not.” He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness.
1. From the text we know that ________ made the hamster feel depressed.
A. the amount of the water
B. the colour of the light
C. the loss of pleasure
D. the level of energy
2.What was the purpose of the experiment on hamsters?
A. To show how well they slept.
B. To see how much sugary water they drank.
C. To explain why they liked dark colours.
D. To find out what caused the depression on them.
3. The author explains the clinical depression by _________.
A. reporting an experiment process
B. presenting research data
C. setting down general rules
D. giving his own experience
4.Where can we probably find the text?
A. In a science magazine.
B. In a physics textbook
C. In a tourist guidebook.
D. In an official announcement.
高三英语阅读理解中等难度题查看答案及解析
Some colors people see late at night could cause signs of the condition mental health experts call clinical depression(临床抑郁症). That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression.
Doctors use the word clinical depression to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death or suicide.
In the new study, American investigators designed an experiment that exposed hamsters（仓鼠）to different colors. The researchers chose hamsters because they are nocturnal, which means they sleep during the day and are active at night. The animals were separated into four groups. One group of hamsters was kept in the dark during their night-time period. Another group was placed in front of a blue light, a third group slept in front of a white light, while a fourth was put in front of a red light. After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the most depressed animals drank the least amount of water.
Randy Nelson, at Ohio State University, says animals that slept in blue and white light appeared to be the most depressed. “What we saw is that these animals didn’t show any sleep interruptions at all but they did mess up biological clock (生物钟) genes and they did show depressive sign but if they were in the dim red light, they did not.” He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness.
1. From the text we know that ________ made the hamster feel depressed.
A. the amount of the water B. the colour of the light
C. the loss of pleasure D. the level of energy
2.What was the purpose of the experiment on hamsters?
A. To show how well they slept.
B. To see how much sugary water they drank.
C. To explain why they liked dark colours.
D. To find out what caused the depression on them.
3. The author explains the clinical depression by _________.
A. reporting an experiment process
B. presenting research data
C. setting down general rules
D. giving his own experience
4.Where can we probably find the text?
A. In a science magazine.
B. In a physics textbook
C. In a tourist guidebook.
D. In an official announcement.
高三英语阅读理解中等难度题查看答案及解析
Some colors people see late at night could cause signs of the condition mental health experts call clinical depression(临床抑郁症). That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression.
Doctors use the word clinical depression to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death or suicide.
In the new study, American investigators designed an experiment that exposed hamsters（仓鼠）to different colors. The researchers chose hamsters because they are nocturnal, which means they sleep during the day and are active at night. The animals were separated into four groups. One group of hamsters was kept in the dark during their night-time period. Another group was placed in front of a blue light, a third group slept in front of a white light, while a fourth was put in front of a red light. After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the most depressed animals drank the least amount of water.
Randy Nelson, at Ohio State University, says animals that slept in blue and white light appeared to be the most depressed. “What we saw is that these animals didn’t show any sleep interruptions at all but they did mess up biological clock (生物钟) genes and they did show depressive sign but if they were in the dim red light, they did not.” He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness.
1.From the text we know that ________ made the hamster feel depressed.
A. the amount of the water B. the color of the light
C. the loss of pleasure D. the level of energy
2.What was the purpose of the experiment on hamsters?
A. To show how well they slept.
B. To see how much sugary water they drank.
C. To explain why they liked dark colors.
D. To find out what caused the depression on them.
3.The author explains the clinical depression by _________.
A. reporting an experiment process
B. presenting research data
C. setting down general rules
D. giving his own experience
4.Where can we probably find the text?
A. In a tourist guidebook. B. In a physics textbook
C. In a science magazine. D. In an official announcement.
高三英语阅读理解中等难度题查看答案及解析