科目: 来源:浙江省高考真题 题型:阅读理解
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科目: 来源:浙江省高考真题 题型:阅读理解
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科目: 来源:浙江省模拟题 题型:阅读理解
Half of the world's population is affected by Asian monsoons(季风), but monsoons are difficult to
predict. American researchers have put together a 700-year record of the rainy seasons, which is
expected to provide guidance for experts making weather predictions.
Every year, moist (潮湿的)air masses,known as monsoon,produce large amounts of rainfall in India,
East Asia, Northern Australia and East Africa. All this wet air is pulled in by a high pressure area over the
Indian Ocean and a low pressure area to the south.
According to Edward Cook , a weather expert at Columbia University in New York., the complex
nature of the climate systems across Asia makes monsoons hard to predict. In addition, climate records
for the area are too recent and not detailed enough to be of much use. Therefore, he and a team of
researchers spent more than fifteen years traveling across Asia, looking for trees old enough to provide
long-term records. They measured the rings, or circles, inside thousands of ancient trees in more than
300 places.
Rainfall has a direct link to the growth and width of rings on some kinds of trees. The researchers
developed a document they are calling a Monsoon Asia Drought Atlas. It shows the effect of monsoons
over seven centuries, beginning in the 1300s.
Professor Cook says the tree-ring records show periods of wet and dry weather. "If the monsoon
basically fails or is a very weak one, the trees affected by monsoons at that location might put on a very
narrow ring. But if the monsoon is very strong, the trees affected by that monsoon might put on a wide
ring for that year. So, the wide and narrow ring widths of the chronology that we developed in Asia
provide us with a measure of monsoon variability." With all this information, researchers say they can
begin to improve computer climate models for predicting the behavior of monsoons.
"There has been widespread famine and starvation and human dying in the past in large droughts.
And on the other hand, if the monsoon is particularly heavy, it can cause extensive flooding." said Eugene Wahl, a scientist with America's National Oceanic and Atmospheric Administration. "So, to get a sense
of what the regional moisture patterns have been, dryness and wetness over such a long period of time
in great detail, I would call it a kind of victory for climate science."
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科目: 来源:湖北省模拟题 题型:阅读理解
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科目: 来源:陕西省模拟题 题型:阅读理解
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科目: 来源:陕西省模拟题 题型:阅读理解
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根据短文内容,从下框的A - F选项中选出能概括每一段主题的最佳选项.选项中有一项为 多余项.
1. _____ Americans are far more knowledgeable about drinks than they were 20 years ago. Witness the Starbucks revolution and you'll know where the trend goes. Now, encouraged by recent studies suggesting that it can cut the risk of cancer and heart disease and slow the aging process, tea is enjoying a similar change. Enough fashionable tea houses are springing up to make even longtime coffee drinkers consider switching drinks. 2. _____ Tea is available in more places than ever. The Tea Association of the United States reports that from 1990 to 1999, annual sales of the drink grew to $4.6 billion from $1.8 billion. "Green tea is seen by consumers as a 'functional food'" - delivering health benefits beyond food itself, says Vierhile. 3. ____ Recently published studies point out that only teas that come from the leaves of the plant Camellia sinensis have been shown to contain health benefits. Other herbal teas may taste good, yet they do little more than warm up the drinker. But for Camellia sinensis, the evidence is powerful. In a 1998 study, Harvard University researchers found that drinking one cup of black tea a day lowered the risk of heart attack by as much as 44 percent compared with non-tea drinkers, and other studies have suggested that the antioxidants (抗氧化剂) in these so-called real teas can also prevent cancer. 4._____ One such antioxidant in green tea is ECGC, a compound 20 times as powerful as vitamin E and 200 times as powerful as vitamin C. "When people ask me for something good and cheap they can do to reduce their cancer risk, I tell them to drink real tea," says Mitchell Gaynor, director of medical oncology at New York City's Strang-Cornell Cancer Prevention Center. 5. _____ Among those inspired to become a green-tea drinker is Tess Ghilaga, a New York writer who took it up after seeking advice from a nutritionist six years ago. "I've never been a coffee drinker," says Ghilaga, 33. "She told me to start drinking green tea for the antioxidant qualities." Now Ghilaga and her husband habitually make tea - they order theirs from InPursuitofTea.com, an Internet tea company. And although tea contains about half the amount of caffeine in a cup of coffee, "you still get such a kick from it," says Ghilaga. |
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科目: 来源:模拟题 题型:阅读理解
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科目: 来源:黑龙江省模拟题 题型:完形填空
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It's early July right now and all I can think of is how I'm going to live through the year financially. 1 prices rising as fast as ants on bread, I wonder how we can 2 it. I can't imagine what a five-person family with one income is 3 right now. You could buy so many things with ten dollars in the past, but today ten dollars in my pocket 4 I worked overtime last week! In the past, I 5 turned the light off when I left a room or turned my computer off when I wasn't using it, but these days, I open the fridge and 6 it as quickly as I can. I 7 more heat because lowering the temperature means a 8 electric bill. We have a budget. Prices keep 9 and our pay doesn't. Don't get me wrong. We have enough to 10 our bills, keep food in the house, and put 11 in our cars, but that's about it. There hasn't been much 12 in our house for the past few months. 13 going out to dinner, we invite people over "potluck(百乐餐,自带饮食的聚会)". I've never been a potluck person. I always had more than 14 food at any event I held at my house. 15 now I ask everyone to bring something. I hate to do it, but I can't 16 not to do it. We aren't having a big family vacation this year instead of taking a weekend to go camping on days we already have 17 . We are eating lots of pasta(意大利面食) these days. As John Mayor sings it-"waiting on the world to change". I am 18 wondering whether it's going to change for the better or continue to get 19 . All I know for sure is that we have to change our budget more 20 , turn more lights off and eat more pasta! | ||||
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科目: 来源:0107 期中题 题型:阅读理解
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科目: 来源:北京高考真题 题型:阅读理解
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