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题型:阅读理解-阅读单选 难度:0.65 引用次数:90 题号:8550403

Myth: If you cut your hair, it will grow long faster.

Truth: That’s not true. “Your hair isn’t like a lawn or a rosebush, where cutting can stimulate fresh growth,” says Phillip Kingsley. The length of your hair is genetically determined. When it reaches a certain length, it stops growing. When you clear up the dead split ends, this makes your hair look healthier, but not necessarily longer.

Myth: If you skip meals, you lose weight fast.

Truth: There’s no truth in this advice. Not only will you not lose weight by starving yourself, but according to Carol Ann Rinzler, this may actually cause you to gain weight. Rinzler reasons that missing a meal causes your metabolism (新陈代谢) to slow down so that you burn food more slowly. This only makes you feel hungrier and by the time you finally do reach the table you will probably eat more food. Strange as it may seem, studies show that eating several small meals and snacks throughout the day is a more healthy way to lose pounds.

Myth: If you swallow goon, it will stay inside your stomach for seven years.

Truth: Actually, it takes just a few days for gum to make its exit - not seven years, says Nei Izenberg, M. D., editor of Kids Health organization. But because gum is made of the same thing as rubber, it cannot be fully digested in your stomach — so if you gum up the works on a regular basis, might find yourself in a stick situation.

Myth: The best way to stop a nosebleed is to lift your head back.

Truth: Now that’s bad advice. Bloody noses are caused by broken blood vessels, so while lifting your head back might stop the fluid from rushing out of your nose, it won’t stop the bleeding; you’ll just end up swallowing lots of blood. Your best bet? “Rest quietly. Don’t poke or pick, and the blood will naturally clot (凝结) within a minute or two,” suggests Dr. Izenberg.

1. The length of your hair is determined by ________.
A.cutting it oftenB.your gene
C.the food you eatD.clearing up the dead split ends
2. According to Carol Ann Rinzler, skipping meals will ________.
A.help you lose weight fastB.help you lose weight slowly
C.cause you to become fatterD.make you burn food more quickly
3. Which of the following statements is NOT true according to the passage?
A.Gum cannot be fully digested in the stomach.
B.Gum can stay inside your stomach for seven years if you swallow it.
C.Gun can leave your stomach after you swallow it a few days later.
D.If you often swallow gum, you might find yourself in a sticky situation.
4. What does the phrase “best bet” mean?
A.A large sum of money.B.An impossible action.
C.High expectation.D.A wise solution.

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【推荐1】“Body clocks” are biological methods of controlling body activities.Every living thing has one.In humans,a body clock controls normal periods of sleeping and waking.It controls the times when you are most likely to feel pain.Eating,sleeping and exercising at about the same time each day will help keep body activities normal.But changes in your life—a new job,for example—destroy the balance and thus cause health problems.You could have difficult sleeping,for example.Scientists suggest that early afternoon is the best time of day for physical exercise. They say we are stronger and faster then.Later,about four o'clock,most people feel tired because of the drop of sugar level in the blood.Early afternoon also is a good time to do tasks about memory(记忆) and mathematics.If you must study,however,do it just before going to sleep at night.Scientists say you are more likely to remember information when there is a short delay(耽搁)between study and bed.Body clocks control all the activities from day to day.They also produce changes about every ninety minutes during the day.At the end of such a time period,our ability to think hard begins to become weak.That is the time we are most likely to day-dream.Within fifteen minutes, we are ready to go back to what we were doing.

1. According to the passage,_____.
A.one can always keep balance in the "body clock"
B.scientists can control body activities
C.body activities are under the control of an unseen force(力,力量)
D.the human body is seldom in balance
2. Irregular(不规律的)signs shown by “body clocks” may serve as a warning of_____.
A.the body clockB.growing old
C.possible illnessesD.difficulty in sleeping
3. We'd like to do physical exercise early in the afternoon because_____.
A.we feel tired of doing anything elseB.the level of sugar in the blood drops
C.we cannot study thenD.our body is most active then
4. The writer suggests that the best time to study is_____.                            :
A.at nightB.late afternoon
C.at about 4 o'clock pmD.in the morning
2017-10-29更新 | 101次组卷
阅读理解-阅读单选(约400词) | 适中 (0.65)
文章大意:本文是说明文。文章讲述了一种利用太阳能发电厂增加降雨的方式。

【推荐2】In the United Arab Emirates (UAE), water is more valuable than oil. To support its citizens, the nation relies on expensive campaigns of cloud seeding from aircraft, which spray particles(喷洒微粒) into passing clouds to make rainfall.

But according to Oliver Branch, a climate scientist, there may be another method to stir up a rainmaker: with city-size solar farms that create their own weather. The heat from dark solar panels can cause updrafts that sometimes lead to rainstorms, providing water for local people. “Maybe it’s not science fiction that we can produce this effect,” says Branch, who led the work.

Few studies have examined how renewable energy might shift weather patterns. In 2020, Branch found that incredibly large solar farms, taking up more than 1 million square kilometers in the Sahara desert, could boost local rainfall. But the reward would come with a cost, the researchers found: By altering wind patterns, the solar farms would push tropical rain bands north. That’s not good news for the Amazon areas.

To find more, researchers turned to a weather model that can account for land surface changes. They modeled the solar farms as nearly black fields that absorbed 95%of the sunlight, surrounded by relatively reflective sand. When the solar farms reached 15 square kilometers, they found, the increased heat they absorbed appreciably increased the updrafts, or convection, that drive cloud formation.

Hacking convection wasn’t enough, however: damp air was also needed. When conditions were ripe, the model also found, a 20-square-kilometer solar field would increase a storm’s total rainfall by nearly 600,000 cubic meters. If such rainstorms occurred 10 times in one summer, they would provide enough water to support more than 30,000 people for a year.

Solar farms in China and elsewhere are nearly big enough, Branch says. If they were built in the right spots, it wouldn’t take much to darken the panels and to plant dark crops between panel rows. Still they’re trying to improve the realism of their solar panel simulations by cross-checking them with field measurements at existing solar farms.

The UAE “is committed to studying the potentially dynamic strategies, such as optimizing convection,” says Alya Al, director of the UAE’s Research Program. For now, she adds, the UAE is deeply committed to its cloud seeding program, carrying out some 300 missions each year.

1. In his study, Branch attempts to produce rainfall ________.
A.by way of updrafts formed on solar farmsB.by spraying particles into passing clouds
C.by means of relatively reflective sandD.by planting dark crops
2. The model is designed to find out ________.
A.the ripe conditions for building a solar farm
B.the realistic size of a solar farm for rainfall increase
C.the annual amount of water consumption in the UAE
D.the heat absorption rate of the solar panels in the black fields
3. What can we learn about Branch’s method?
A.It is not supported by the director.B.It needs great investment if applied.
C.It remains to be further tested in practice.D.It has promoted cloud seeding in the UAE.
2024-05-05更新 | 131次组卷
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【推荐3】We are naturally drawn to friends and colleagues with familiar voices, scientists have found. People prefer those who have a similar accent, intonation and tone of voice to themselves, they discovered.

Previous research has focused on how a male or female voice sounds. Men with deeper voices and women with slightly higher voices were thought to sound more attractive, because they suggest a bigger or a smaller body.

But the new study, published by a linguistics expert in        Canada, suggests there is a more complex mechanism(机制)at play. Dr Molly Babel, from the University of British Columbia in Canada, said, “The voice is an amazingly flexible tool that we use to construct our identity. Very few things in our voices are changeless, so we felt that our preferences had to be about more than a person’ s shape and size.’’

She recorded 30 volunteers’ voices and asked each to rate the others’ attractiveness on a scale of one to nine. Each participant was from western       America, with similar accents. The people we assessed were all in the same dialect group, but they showed that dialect to different degrees.

“We seem to like people who sound like we sound, we like people who fit within what we know, ” Dr Babel said. She also found that breathy voices in women-typified by the famous American actress Marilyn Monroe-were seen as more attractive.

The breathy tone, caused by younger and thinner vocal cords(声带), implied youthfulness and health. A creaky (咯吱作响的)voice, suggesting a person has a cold, is tired or smokes, was seen as unattractive. The participants preferred men who spoke with a shorter average word length and deeper voices.

1. The main purpose of the text is to ___________.
A.inform readers of the new findings of voicesB.compare male voices with female voices
C.argue against women’s voices of speakingD.encourage men to use deeper voices to speak
2. Dr. Molly        Babel mentions Marilyn Monroe in order to________.
A.introduce a creaky voiceB.explain a breathy voice
C.challenge previous researchD.promote her reputation
3. In terms of voice preferences, the new findings stress ________.
A.body size and shapeB.shorter word length
C.thicker vocal cordsD.the same social groups
4. Whose voice may be unattractive according to the text?
A.A young lady with a thin voiceB.An old lady with a silvery voice
C.A deep-voiced man with a dry throatD.A little man with a quiet and gentle voice
2017-11-21更新 | 121次组卷
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