Experts have been warning___of the health ris...

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.

高三英语单项填空中等难度题查看答案及解析

Choose the yum(美味的东西) and risk the yuk（讨厌的东西）?

Scientists have given us a lot of health warnings. The advice from cancer experts for avoiding bowel(肠) cancer is "try to avoid processed(加工过的) meats such as bacon, ham, corned beef and some sausages", and women fearing breast cancer are told "there doesn't seem to be a starting point at which alcohol consumption is safe",

But all these health warnings tend to have little influence on behavior, So who is being unreasonable —the scientists who give us health advice, or the public that just ignores it?

The curious fact is that both might be right. The reasoning behind these health warnings seems to be this: if you do more of something pleasurable (which we shall give the name “yum”) there is a higher risk of something bad (which we shall give the name “yuk”)occurring, so you should avoid yum.

But when presented with this argument you might ask two questions.

First, maybe the pleasure of yum makes the risk worth taking, especially if yuk might occur a long time in the future? Second, maybe there are other benefits of yum that could cancel out the risks of the particular yuk that has been identified (确认) ?

So suppose bacon sandwiches are your particular yum: research shows that 50g per day — that is a great greasy sandwich — increases your risk of bowel cancer by 20%.

But this means that out of every 100 people who stuffed down that big bacon sandwich every day of their lives, the number of bowel cancers would rise from five to six.

In addition, if a middle-aged woman gave up alcohol, it might reduce her risk of breast cancer, but could increase risk of some other cancers as well as heart disease.

So we need to look at the whole picture before trying to get people to change what they do, since everything has benefit and harms — just think of the joggers(慢跑者) who get knocked down by cars — and people need to be able to find their own balance.

Therefore, as you reach for your yum, perhaps sometimes pause a moment and realize that you are taking a gamble(赌博) on the yuk occurring, but that it may be a risk worth taking.

1.What is the advice given by scientists for avoiding breast cancer?

A. Try to avoid processed meat. B. Try to avoid alcohol.

C. Try to choose the yum.           D. Try to risk the yuk.

2. What does “this argument” in Paragraph 4 mean?

A. If you choose the yum, you will risk the yuk.

B. If you risk the yuk, you’ll choose the yum.

C. The yum is worth taking, especially if yuk might occur in the future.

D. Other benefits of yum could cancel out the risks of the yuk.

3.Why do we need to look at the whole picture before trying to get people to change what they do?

A. Because giving up alcohol might reduce breast cancer.

B. Because people are not able to find their own balance.

C. Because all the things have both sides.

D. Because the advice given by scientists is not true.

4.According to the passage, which of the following is correct?

A. People are often influenced by the health warnings.

B. Both the scientists and the public are not reasonable.

C. Alcohol consumption has both benefit and harms.

D. People should avoid yum to reduce the risk of yuk.

高三英语阅读理解中等难度题查看答案及解析

For some time the expert __________ people of the health risks caused by passive smoking. He　　　 says he won't stop until all the smokers around him decide to quit smoking.

A. is warned        B. is warning            C. has been warning    D. has been warned

高三英语单项填空中等难度题查看答案及解析

Experts are warning about the risks of extreme fussy eating(挑食)after a teenager developed permanent sight loss after living on a diet of chips and crisps.

Since leaving___ school, the teen had been eating only French fries, Pringles and white bread, as well as a(n)___ slice of ham or a sausage. At the age of 14, feeling tired and not well, he was diagnosed with vitamin B12 deficiency(缺乏)and was___ supplements(补充剂), but he did not___ the treatment or improve his poor diet. Three years later, he was taken to the Bristol Eye Hospital because of progressive___ loss.

Dr Denize Atan, who___ him at the hospital, said, “The teenager explained this eating disorder as a dislike of certain textures of food that he really could not____, and so chips and crisps were really the only types of food that he wanted and felt that he could eat.”

__ in B12 as well as some other important vitamins and minerals, he was not over or underweight, but was____ malnourished (lacking nutrition) from his food intake disorder. “He had lost minerals from his bone, which was really quite___ for a boy of his age.”

In terms of his sight loss, he met the___ for being registered blind. Dr Atan said, “He can’t drive and would find it really difficult to____, watch TV or recognize faces. He can walk around on his own,____, because he doesn’t lose peripheral( 周 边 的 )vision.”

The condition the young man has is treatable___ diagnosed early. Left too long, however, the nerve fibers in the optic nerve die and the damage becomes____. Dr Atan said cases like this are thankfully uncommon, but that parents should___ the potential harm that can be caused by picky eating, and seek expert help.

Dr Atan said vegans(素食主义者)are also at increased risk of B12 deficiency-related sight problems if they do not replace what they can lack when___ meat from their diet.

“Multivitamin tablets can supplement a diet, but are not a(n) ___ for eating healthily. It’s much better to___ vitamins through a varied and balanced diet,” she said, adding that too much of certain vitamins, including vitamin A, can be____, “so you don’t want to overdo it”.

1.A.vocational B.primary C.middle D.special

2.A.funny B.rigid C.occasional D.raw

3.A.forbidden B.denied C.prescribed D.offered

4.A.stick with B.cope with C.play with D.go with

5.A.diet B.sight C.weight D.wit

6.A.cured B.studied C.instructed D.treated

7.A.describe B.recognize C.tolerate D.receive

8.A.Abundant B.Lost C.Backward D.Lacking

9.A.severely B.scarcely C.seemingly D.sincerely

10.A.amusing B.normal C.shocking D.typical

11.A.situations B.criteria C.deadlines D.challenges

12.A.read B.sing C.dance D.laugh

13.A.even B.though C.still D.yet

14.A.since B.unless C.after D.if

15.A.persistent B.periodic C.persevering D.permanent

16.A.wake up to B.live up to C.stand up to D.come up to

17.A.excluding B.separating C.including D.distinguishing

18.A.companion B.substitute C.suggestion D.explanation

19.A.take off B.take after C.take in D.take over

20.A.rewarding B.compulsory C.restrictive D.poisonous

高三英语完形填空中等难度题查看答案及解析

Researchers have long known that lack of sleep can cause weight gain and increase other health risks. But for those who force themselves out of bed every weekday after too few hours of sleep, they always hope that turning off the alarm on weekends will repay the weekly sleep debt and change any ill effects around completely.

New research published in Current Biology destroys those hopes. Despite complete freedom to sleep in during a weekend recovery period, participants in a sleep laboratory who were limited to five hours of sleep on weekdays gained nearly three pounds over two weeks. They also experienced metabolic disruption (新陈代谢紊乱). Weekend recovery sleep had some benefits after a single week of lack of sleep. However, those gains were wiped out when people went back into their old schedule the next Monday.

“These health effects are long-term,” said Kenneth Wright at the University of Colorado at Boulder, who oversaw the work. “It’s kind of like smoking once was. People would smoke and wouldn’t see an immediate effect on their health, but now they will say that smoking is not a healthy lifestyle choice. I think “catch-up” sleep is in the early phase of where smoking used to be.”

Michael Grandner, at the University of Arizona, said the study highlights that people need to stop thinking of sleep as a balance sheet (资产负债表). Considerably cutting calories all week and then bingeing on (无节制地吃) a giant pizza on Saturday would not restore balance. That is essentially what people are doing when they skip sleep on weekdays with the idea that they can make up for it on the weekend.

The study suggests people should put sleep first — cutting out the optional “sleep stealers” such as watching television shows or spending time on electronic devices. Even when people do not have a choice about losing sleep due to tight schedules, they should think about sleep first in the same way they would a healthy diet or exercise.

1.Why do people hope to sleep longer on weekends?

A.To avoid some debt concerns. B.To cure some illness.

C.To get some health benefits. D.To get complete freedom.

2.What can we infer about weekend recovery sleep from Kenneth Wright?

A.It has the long-term benefits. B.It hides some potential harm.

C.It causes smoking problems. D.It contributes to losing weight.

3.What does the text suggest people do about sleep?

A.Sleep well every day. B.Guarantee weekly sleeping hours.

C.Make up for missing sleep. D.Stop watching TV shows before bed.

4.What can be a suitable title for the text?

A.Weekend “Catch-Up Sleep” Is a Lie.

B.Watch out for "Sleep Stealers".

C.Sleep and Smoking are alike.

D.Lack of Sleep Does No Good.

高三英语阅读理解中等难度题查看答案及解析

Many of the world's pollution problems have been caused by the crowding of large groups of people into the cities．Supply for the needs of the people leads to further　 　 　　 by industry．If the rapid increase of world population continues at the present rate, there may be much greater　　 　 　 to human beings．

Some scientists speak of the increase in numbers of people as "population pollution''．

About 2,000 years ago, the world population was about 250 million．It　　 　 　　 a billion in 1850．By 1930 the population was two billion．It is now six billon．It is　　 　 　 to double by the year 2020．If the population continues to grow at the same rate, there will be 25 billion people in the　　 　 　　 a hundred years from now．

Man has been　　 　 　 the earth's resources more and more　　 　 　　 over the past years．Some of them are almost gone．Now many people believe that man's greatest problem is how to control the　　 　 　　 of the population．The material supplies in the world will be far from enough to　　 　 　 the human population if the present rate of increase continues．

There is already over-crowding in many cities and starvation in some countries．Many people believe that human survival in the future 　 　 on the answer to the question．

1.A．progress　      B．pollution    　　 C．education　     　　 D．production

2.A．danger    B．harm    C．benefit    D．hardship

3.A．got    B．took    C．brought    D．reached

4.A．suggested　　 B．hoped    C．expected    D．said

5.A．world    B．country　     C．star　     D．end

6.A．discovering[　 B．using    C．digging    D．destroying

7.A．seriously　　 B．dangerously　 C．rapidly    D．steadily

8.A．existence　　 B．start    C．growth    D．birth

9.A．increase　　 B．starve    C．construct 　　　　　　 D．support

10.A．depends　 B．agrees    C．saves    D．passes

高三英语完型填空中等难度题查看答案及解析

Many of the world’s pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further 1 by industry. If the rapid increase of world 2 continues at the present rate, there may be much greater 3 to human beings. Some scientists 4 of the increase in numbers of people as “population pollution（人口公害）”.

About 2, 000 years ago, the world population was about 250 million. It 5a billion in 1850. By 1930 the population was two billion. It is now six billion. It is 6to double by the year 2020. If the population 7 to grow at the same rate, there will be 25 billion people in the 8 a hundred years from now.

Man has been 9   the earth’s resources more and more 10   over the past years. Some of them are almost gone. Now many people believe that man’s 11   problem is how to control the 12   of the population. The material supplies in the world will be far from enough to 13  the human population if the present rate of increase continues. There is already over-crowding（过分拥挤）in many cities and 14  in some countries. Many people believe that human survival（生存） in the future 15  on the answer to the question.

1.                A．progress        B．pollution        C．education D．production

2.                A．agriculture      B．industry        C．environment   D．population

3.                A．danger         B．harm           C．benefit   D．hardship

4.                A．dream         B．approve        C．rid  D．speak

5.                A．got            B．took           C．brought  D．reached

6.                A．suggested       B．hoped          C．expected D．said

7.                A．continues       B．fails            C．tries D．means

8.                A．world          B．country         C．star  D．end

9.                A．discovering      B．using           C．digging   D．destroying

10.               A．seriously       B．dangerously     C．rapidly    D．steadily

11.               A．greatest        B．easiest         C．lightest    D．simplest

12.               A．existence       B．start           C．growth    D．birth

13.               A．increase        B．decrease       C．report D．support

14.               A．discussion      B．starvation       C．construction    D．argument

15.               A．depends        B．agrees         C．saves D．passes

高三英语完型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