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1、精选优质文档-倾情为你奉上Part 1 ReadingSection AFormat 1To hear most recent research tell it, coffee is a miracle drink. The magic beans will ward off skin cancer and Alzheimers(老年痴呆症), reduce heart failure and diabetes（糖尿病） risks, heighten focus, and maybe even protect liver health. Oh, and decrease suicide ri
2、sk, according to the newest study that validates our coffee addictions.According to a study performed by the Harvard School of Public Health and published this month in The Worl d Journal of Biological Psychiatry, people who drink two to four cups of java each day are less likely to commit suicide t
3、han those who dont drink coffee, drink decaf, or drink fewer than two cups each day. The study followed ove r 200,000 people for at least 16 years. And its not just a weak link: the researchers found that the suicide risk was cut by around 50 percent for coffee addicts.This isnt the first time that
4、researchers have discovered that coffee and smiles might go hand-in-hand. A 2011 study found that women who drink coffee cut their risk of depression by 15 percent compared to those who dont. Michel Lucas, the head researcher of the most recent study, told The Huffington Post that coffee addicts can
5、 thank caffeine for the good news. The drug may actually act like a mild anti-depressant by tweaking levels of happy hormones .Of course, theres plenty of research out there that doesnt look so kindly upon coffee drinkers. Recently, the New Yorker published an article arguing that while coffee may h
6、eighten focus, that means it also puts a squeeze oncreativity. And of course, coffees well-known negative effects like insomnia(失眠症) and disturbed sleep cycles still hold.Regardless, well raise our mugs to this most recent study for justifying our coffee addictions once again.1 . Which of the follow
7、ing is not mentioned as a possible benefit of drinking coffee ?A. reducing heart failure risksB. protecting liver healthC. preventing skin cancer D.improving eyesight2 . According to a study performed by the Harvard School of Public Health , people are less likely to commit suicide if they_A. drink
8、fewer than two cups of coffee each dayB. drink more than four cups of coffee each dayC. drink two to four cups of coffee each dayD. don t drink any coffee each day3 . The reason why coffee can cut the suicide risk lies in that _A.it can heighten focusB. it can cure skin cancerC. it may help to preve
9、nt depressionD. it may make people less creative4 . One of the negative effects of coffee is that it_A. costs a lot of moneyB. disturbs sleepC. makes people fatD. causes coffee addictions5 . What might be the writer s attitude toward coffee drinking ?A. PositiveB. HostileC. IndifferentD. ToughPassag
10、es 2Polar bears are classified as marine mammals(哺乳动物), like a seal or a whale, which might come as a surprise given that theyre usually pictured on land.But polar bears spend a lot of their time in the waters of the Arctic(北极),fishing or swimming among the sea ice.They may look awkward in the water
11、 , but no creaturewith paws is a better swimmer.Theyd better be.Arctic sea ice is declining fast,robbing the polar bear of its prime habitat and forcing them to swim longer and longer distances to reach solid ground . No other animal seems to be such a direct victim of warming, which is one reason w
12、hy the polar bear has emerged as the symbol of climate change . ( Another is that they look so cute and cuddly . )It s a simple narrative to grasp :carbon warms the climate , Arctic sea ice melts and baby polar bears down.But it turns out it might not be that simple .A new study by scientists at the
13、 U. S. Geological Survey (USGS ) underscores the fact that polar bears really are amazing swimmer. In fact they are so good that biologists were able to document 5 0 swims that cover an average length of 96 miles. the research provides clues that polar bears maybe able to keep treading(踩 ) water eve
14、n as climate change melts their habitat.The researchers published their work in the Canadian journal of zoology . they followed 52 female polar bears in the Arctic Ocean north of Alaska from 2004 to 2009,using radio collars that could track the movements of the animals . They then compared the paths
15、 taken by the bears with maps of shifting sea ice over the same period of time , and found that the polar bears were world - class marathon swimmers and those long , long dips in the ocean werent outliers while the really long -distance sw ims wer e re l ativel y ra t e, 3 8 % of th e be a rs surve ye d took at lea s t on e such mara thon swi m . 6 . People may feel surprised to know that polar bears are classified as marine mammals because_A. polar bears cannot live in the seaB. polar bears have paws and can walkC. polar bears are usually seen on landD. pola
