阅读理解。 ●What prevents depression; tea, coffee or hot chocolate? Women who
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Women who drink for or more cups of coffee a day are a fifth less likely to become depressed.
Drinking two or three cups reduces the risk by 15 percent. This is the result of a study of 51,000 women
over ten years, published in the Journal of the American Medicine Association.
One theory is that caffeine reduces the effect of the chemical adenosine (腺苷) in the brain, which
can make us feel sleepy by slowing down nerve cell activity. Some anti-depressants also work by
blocking the adenosine receptors. Coffee was found to be far more influential on depression levels than
hot chocolate or tea due to the high caffeine content.
●How many eggs can we healthily eat: one a day or two a day?
Neither-eat them freely. We"ve long been warned to stick to two or three eggs a week because of
their high cholesterol (胆固醇) content. But according to the Food Standards Agency, there is no
recommended limit to how many eggs we can healthily eat, unless you have been told to cut down by
your doctor.
There is no evidence that eating eggs raises cholesterol levels, and researchers found that eggs contain
less cholesterol than in the past because hens are no longer given bone meal, which was banned in the
1990s after the BSE (疯牛病) crisis.
Research by the British Egg Council found that a medium egg gives you around 100 mg of cholesterol, a third of the 300mg recommended daily limit.
B. Chocolate.
C. Adenosine.
D. Coffee.
B. coffee contains less caffeine than tea or hot chocolate
C. one is depressed if his brain chemical adenosine is active
D. tea and hot chocolate have no effect on men"s depression
B. Eat as many eggs as you like unless your doctor advises you not to.
C. Eggs contain more cholesterol at present than ever before.
D. One egg daily and you"ll get more cholesterol than recommended.
答案
举一反三
week"s British Medical Journal. Their advice is part of a review aimed at doctors who deal with dog bites.
"Dog bites and maulings are a worldwide problem, particularly in children." write Marina Morgan and
John Palmer. Every year 250,000 people who have been bitten by dogs attend minor injuries and
emergency units in the United Kingdom, and half of all children are reportedly bitten by dogs at some
time, boys more than girls.
Accurate death figures are difficult to obtain, but in the past five years, two to three cases a year have
made news headlines.
Based on the latest medical evidence, they advise doctors how to examine and treat a patient
presenting with a dog bite. They discuss the risk of infection and when to refer to specialist care. For
travelers bitten abroad, they suggest assessing the risk of rabies(狂犬病).
In terms of prevention, they suggest that children should be taught to treat dogs with respect, avoid
direct eye contact, and not tease them. They should be taught not to approach an unfamiliar dog; play
with any dog unless under close supervision; run or scream in the presence of a dog; pet a dog without
first letting it sniff you; or disturb a dog that is eating, sleeping, or caring for its babies.
"Dog owners also need to change their behavior", says Rachel Besser, a children"s doctor and lifetime
dog owner, in an article.
"It is clear that not all dog owners appreciate that children should not be left unsupervised with a dog",
she says. Just as some parents are obliged to take parenting classes, she would like to see compulsive
classes for expectant dog owners to teach them about the responsibilities of dog ownership. Educational
programs are also needed to teach children about some precautionary (预防的) behaviors around dogs.
Finally, she would like to see animal doctors advising dog owners about bite prevention, and doctors
promoting bite prevention when treating patients who have been bitten by dogs.
B. only happens to a few children
C. only boys may meet with
D. has made news headlines
B. parents
C. experts
D dog owners
B. approach an unfamiliar dog
C. run or scream in the presence of a dog
D. leave a dog feeding itself
B. Children should be taught not to play with dogs.
C. Some dog owners would like children to be left unsupervised with a dog.
D. All the dog owners would like to attend classes on caring for dogs.
B. Children Should Know Behaviors Around Dogs
C. Doctors, Treat Dog Bites Correctly
D. Never Leave Children Unsupervised With Dogs
Affected by habitat (栖居地) loss and climate change, like many other uniquely Australian animals, koalas are being squeezed into smaller regions. But at present, it is a deadly disease, a somewhat silent killer that causes a further decline in the koala population, that is worrying many scientists about the fate of the koala.
The killer is Chlamydia, which has caused symptoms in up to 50 percent of the wild koalas, with probably even more infected (感染) but not showing symptoms. It has been particularly severe in Queensland, where nearly all koalas are infected. The disease causes many symptoms including eye infections, which can lead to blindness, making it difficult for them to find their primary food.
Treating Chlamydia in wild koalas is a challenge. There is no treatment available for it. Only a small percentage of the animals can be treated successfully and returned
to the wild. Besides, there is no national plan in Australia to save the koala;it is up to each region to make management plans for its koala population.
The good news is that researchers are working to test a vaccine (疫苗) that would help prevent further spread. If all goes well, plans can be carried out to distribute the vaccil1e more widely. But it"s impossible to vaccinate all wild koalas.
Another possibility would be to make vaccine distribution a routi11e part of treatment for the thousands of koalas brought into care centers every year after they are injured by cars or dogs.
While it is a combination of problems that are affecting the wild koala population, many expects believe this vaccine would be an important step in helping koalas survive longer. It may buy enough time to give researchers a chance to solve some of the other problems facing Australia"s koalas.
B. Injuries from cars and dogs.
C. Climate change.
D. Habitat loss.
B. Chlamydia affected the koala only in particular regions
C. the most serious symptom of Chlamydia is eye infections
D. Chla1nydia can seriously affect koala"s primary food
B. Chlamydia
C. national plan
D. eye infection
B. would only be distributed in koala care centers
C. has already been put into practical use in Australia
D. cannot be distributed to all the infected koalas
B. koala population is declining only in a few regions
C. researchers need enough time to so1ve the koala problems
D. experts have lost the best chance to save the infected koalas
Deaths per(每) 100,000 Population in Town A form the Following Causes(1960-1969)
1. Of every hundred thousand citizens in Town A _______ died of T.B. in 1965.
A. 134
B. 59
C. 60
D. 65
2. According to the chart, what’s been the NO. I killer in Town A in the last ten years?
A. Heart trouble
B. T.B.
C. Cancer
D. Accidents
3. If 1,200 people died in Town A from accidents in 1967, the population of Town A that year was
about. .
A. 96, 000
B. 100,000
C. 150,000
D. 1,500,000
4. What percent of the total deaths were because of cancer in Town A in 1966?
A. 1.64%
B. 0.164%
C. 16.4%
D. 1.63%
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项.选项中有两项，为多余
选项。
Imagine living on the edge of a vast desert, which is moving quietly closer to your village every day
and covering your fields. The desert is on the move. This is called desertification.
Desertification occurs in regions close to an already existing desert. 1 The first is over-use of
water in the area. There is not enough water in any case, and if it is not carefully used, disaster can follow. As time goes on, water shortages make farming more and more difficult. In some places, locals can
remember local lakes and marshes which were once the homes for all kinds of fish and birds. 2
Farmers leave the land, and fields are replaced by deserts.
The second cause is misuse or over-use of the land. 3 Ploughing(耕) large fields and removing
bushes and trees means that the wind will blow away the soil. Once the soil is lost, it is hard to replace,
and if there is rain, it has nowhere to go, and brings no benefit.
4 Every spring, the skies over some of eastern cities, thousands of kilometers away from the
deserts, can be darkened by sandstorms. Dust from deserts can have a great effect on weather systems. While desertification is perhaps being partly caused by global warming, these sandstorms can make
global warming worse by adding to what is known as the greenhouse effect.
What can be done to slow down or stop the process of desertification? A great deal of work is
already under way. Obviously first steps are to find new water sources. 5 Some types of grass also
hold the soil together, and stop the wind taking it. Without these efforts, it will be harder and harder to
stop the world"s deserts in their tracks, and more and more farmers will give up and head for cities. The
lesson to be learnt lies beneath the sand.
| A. It generally arises from two related causes. B. It is not only the farmers and villagers who suffer. C. They have been completely buried by the sand now. D. Scientists are doing the research on the cause of desertification. E. They destroy the land, as the soil dries out and is then blown away. F. Tree planting can help, by providing barriers between desert and rich field. G. This means that the wrong crops are planted, and need more water than is available. |
| 阅读理解。 |
| Hi, boys and girls! Do you know how to be a healthy kid? Here are some rules you should follow. First, eat different foods, especially fruit and vegetables. You may have a favorite food, but you"d better eat something different; if you eat different foods, you will probably get more nutrients your body needs. Second, drink water and milk as often as possible. When you"re really thirsty, cold water is the NO.1 choice. Milk is a great drink that can give you more calcium your body needs to grow strong bones. Third, listen to your body. How do you feel when you are full? When you are eating, notice how your body feels and when your stomach feels comfortably full. Eating too much will not make you feel comfortable and make you fat. Fourth, limit screen time. Screen time is the time you watch TV, DVDs and videos, or using computers. It is good to take more exercise such as basketball, bike riding and swimming. You can"t watch TV for more than two hours a day. Fifth, be active.One thing you"d like to do as a kid is to find out which activity you like best. Find ways to be active every day. Follow these rules and you can be a healthy kid. |
| 1.You should eat different foods especially _______. |
| A .meat B. hamburgers C. sweets D. fruit and vegetables |
| 2. Which kind of drinks can give you more calcium? |
| A. Juice. B. Milk C. Cold water. D. Tea. |
| 3. According to the passage, which of the following is TRUE? |
| A. When you"re eating, you don"t have to notice how your body feels. B. You can eat your favorite food as much as possible. C. You can watch TV whenever you like to get more information. D. We should try to live in an active way in our life. |
| 4. Which is the best title of the passage? |
| A. How to make yourself important. B. How to be a healthy kid. C. How to be a popular kid. D. How to make your parents healthy. |