阅读理解。 Recent research has claimed that an excess of positive ions in the air
题型：北京模拟题难度：来源：
physical or psychological health. What are positive ions? Well, the air is full of ions, electrically charged
particles, and generally there is a rough balance between the positive and the negative charged. But
sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This
happens naturally before thunderstorm, earthquakes when winds are blowing in certain countries. Or it
can be caused by a build-up of static electricity indoors from carpets or clothing, or from TV sets,
duplicators or computer display screens.
When a large number of positive ions are present in the air many people experience unpleasant effects
such as headaches, fatigue , excessive anger, and some particularly sensitive people feel sick or even
suffer mental disturbance. Animals are also affected, particularly before earthquakes, snakes have been
observed to come out, rats to flee from their burrows, dogs howl and cats jump about unaccountably.
This has led the US Geographical Survey to fund a network of volunteers to watch animals in an effort to
foresee such disasters before they hit vulnerable areas such as California.
Conversely, when large numbers of negative ions are present, then people have a feeling of well-being. Natural conditions that produce these large amounts are near the sea, close to waterfalls or fountains, or
in any place where water is sprayed, or forms a spray. This probably accounts for the beneficial effect of
a holiday by the sea, or in the mountains with streams or waterfalls.
To increase the supply of negative ions indoors, some scientists recommend the use of ionisers. They
claim that ionisers not only clean and refresh the air but also improve the health of people sensitive to
excess positive ions. Of course, there are the detractors, other scientists, who dismiss such claims and
are skeptical about negative/positive ion research. Therefore people can only make up their own minds
by observing the effects on themselves, or on others, of a negative rich or poor environment. After all it is
debatable whether depending on seismic readings to anticipate earthquakes is more effective than watching the cat.
B. It"s basically static electricity indoors.
C. It"s a balance between the positive and negative charged.
D. It"s an ill effect on people"s physical and psychological health.
B. They will be sick and tired of life.
C. They may feel rather bad-tempered.
D. They may feel they are out of their mind.
B. by a water spray in a garden.
C. close to a slow-flowing river.
D. near a pound with a water pump.
B. Opposed.
C. Supportive.
D. Ambiguous.
答案
举一反三
阅读下面短文，根据所读内容在表格中的空白处填入适当单词。注意：每个空格只填一个单词。
First, it is absolutely necessary to take some exercise at regular time every day. Research shows that
getting plenty of exercise can make the heart beat faster and the lungs work harder. This strengthens the
heart, reduces the chance of heart attack, and helps lower blood pressure. That"s why more and more
people are becoming active in various kinds of sports and exercise. Every morning many people get up
early and take much exercise. Some play ball games while others run, jog, walk or dance to music. In the
afternoon, there are also many people keen on sports. Through sports and exercise, people become
healthier and stronger.
Medical researchers have proved that what people eat affects their health. They advise people to
eat more fruit and vegetables and less meat such as beef and pork because meat contains more fat than
poultry (家禽) and fish. Fat can build up in the arteries (动脉), block the flow of blood, and cause a heart
attack or stroke (中风).
Getting rid of bad habits like smoking and drinking alcohol is also an important way to keep healthy.
Smoking and drinking alcohol injure one"s health a great deal, and therefore should be
given up. Unfortunately few people follow this advice.
| Best title: How to keep 1._____ | ||||||||||||||||||||||||||||||||
| Tips | Details | |||||||||||||||||||||||||||||||
| Take some exercise 2.____ | Benefits of plenty of exercise: The heart can be 3._____ ; The chanceof heart attack can be 4._____ ; Blood pressure can be 5._____ . | |||||||||||||||||||||||||||||||
| Pay attention to your6._____ | 7.____ Suggestions: | Fat can result in a heart attack or stroke; More fat may be 8._____ in meat. To eat more fruit and vegetables; To eat less meat such as beef and pork. | ||||||||||||||||||||||||||||||
| Give up bad habits | Harm of bad habits: smoking and drinking alcohol do 9.____ to one"s health. Advice: Getting rid of bad habits like smoking and drinking. | |||||||||||||||||||||||||||||||
| 10._____ | If people follow these ways, they will greatly improve their health. | |||||||||||||||||||||||||||||||
| 任务型读写。 阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。 注意：每个空格只填一个单词。 | ||||||||||||||||||||||||||||||||
| One reason Americans eat so many calories is that we tend to eat large portions (分量). Studies find that hamburgers and fries are generally offered in serving sizes two to five times larger than the appropriate meal size. Researchers find we usually clean our plates no matter how high they"re piled, even if we alrea  dyfeel satisfied. See the suggestions below to further master the fine art of sizing up 估量) your snacks and suppers. Extremely large portions are one possible reason Americans continue getting fatter even as the percentage of our total calories from fat has gone down in recent years. Fortunately, portions are relatively simple to control because it"s easier to count cookies than calories or grams of fat. Pre-picture portions. Use familiar objects to picture how much you should eat of a food before you pick up your fork or spoon. For example, a half cup of low-fat granola is about the size of your fist. A half cup of low-fat ice cream equals half an orange. Use a smaller dish. This tip might sound ridiculous, but it works. First and mostobvious is that you can"t put as much food on, say, a salad plate. But psychologically, you"re just not as prone to eat as heartily and quickly if your plate will be empty in 45 seconds. Have raw vegetables at every meal. Raw cucumbers, tomatoes, carrots, and peppers have few calories and lots of nutrients. A plate of them in the middle of the table almost always gets eaten up, cutting down appetite for the more calorie-dense meat. Start your meal with soup. Studies show that a bowl of soup at the start of the meal reduces overall meal consumption, since they are lowest in calories and highest in nutrients. Manage your fork. After every bite of food, put your fork down. Don"t pick it up until you have thoroughly chewed and swallowed the previous bite. The goal is both to slow down your eating and to eat less. Remember: Your body needs 20 minutes of digestion before it sends signals to your brain that you are no longer hungry. | ||||||||||||||||||||||||||||||||
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otice your friends" feelings and find a way to help them.
of cars were 10% more efficient(高效的), we would need many fewer tankers 
t ?
oil pollution is
cidents 
es the underlined word " risk " in Paragraph 2 refer to ?
elop new technologies to cut oil use