外研版高中英语必修一《阅读理解》专项练习题（含答案）
A so-called “smart drug” intended to improve people's cognitive (认知的) function to protect the brain from altitude sickness.
Visiting high-altitude sites for work, spot, religious pilgrimages and military can result in cognitive effects, including memory loss and attention difficulties. There's little you can do to prevent the symptoms except acclimatize -but this takes time and doesn't always work. A drug called oxiracetam might be the answer.
ShengLi Hu at the Third Military Medical University, Chongqing, China and her colleagues studied the performance of male military personnel at altitude. All lived in towns around 1,800 meters above a level, During the study, they spent eight days at this altitude and then climbed for three days to reach 4,000 meters, where they stayed for up to a month.
Twenty participants took oxriacetam three times a day for the first 15 days of the study, while another 20 received no intervention. The man did tests of attention and memory at th
e start and end of the study and 20 days in, by which time they had been at 4,000 meters for nine days.喝酒玩的游戏
While all the participants experienced a drop in cognitive ability at 4,00 meters, tho who took oxiracetam showed a much smaller drop than the control group.
The team found that at high altitude the brain stem, which plays a critical role in supporting basic living functions, received blood at the expen of areas responsible for more advanced cognitive functions. But in people who took oxiracetam, blood flowing throughout the brain ro,thus offering more oxygen to the areas. This may be how the drug ems to lesn cognitive problems like with low oxygen.
It isn't yet known whether diverting blood in this way could have negative effects in the long run. "The results are striking and imply that oxiracetam may be beneficial for helping to relieve cognitive ability decline caud by altitude." says Timothy Hales at the University of Dundee, UK.
1．The underlined word “acclimatize” in Paragraph 2 is clost in meaning to______ .
A．adapt B．ignore
C．exist D．relax
2．What does the experiment done in China indicate?手机密码忘记了怎么解锁>梦见河水上涨
A．The higher altitude you are at, the slower your brain will be.
B．At 4,000 meters, the two subject groups show little difference.
C．Memory tests are beneficial to relieving attention difficulties.
D．“Smart drug" largely reduces negative effects of altitude sickness.
3．According to the passage, the root cau of the cognitive effects lies in______ .喂母乳不能吃什么
最好听的古风歌曲
A．physical tiredness B．low oxygen content
C．cognitive training D．extreme high altitude
4．What is the best title for the passage?
A．Fight High Anxiety B．Oxiacetam - A Magic Drug
C．Keep Sharp at Altitude D．Problems on High-altitude Sites
We’ve all been there: in a lift, in line at the bank or on an airplane, surrounded by people who are, like us, deeply focud on their smartphones or, wor, struggling with the uncomfortable silence.
What’s the problem? It’s possible that we all have compromid conversational intelligence. It’s more likely that none of us start a conversation becau it’s awkward and challenging, or we think it’s annoying and unnecessary. But the next time you find yourlf among strangers, consider that small talk is worth the trouble. Experts say it’s an invaluable social practice that results in big benefits.
小米鸡蛋粥
Dismissing small talk as unimportant is easy, but we can’t forget that deep relationships wouldn’t
even exist if it weren’t for casual conversation. Small talk is the grea(润滑剂) for social 通讯英文
communication, says Bernardo Carducci, director of the Shyness Rearch Institute at Indiana University Southeast. ＂Almost every great love story and each big business deal begins with small talk,＂ he explains. ＂The key to successful small talk is learning how to connect with others, not just communicate with them.＂
In a 2014 study, Elizabeth Dunn, associate professor of psychology at UBC, invited people on their way into a coffee shop. One group was asked to ek out an interaction(互动) with its waiter; the other, to speak only when necessary. The results showed that tho who chatted with their rver reported significantly higher positive feelings and a better coffee shop experience. ＂It’s not that talking to the waiter is better than talking to your husband,＂ says Dunn. ＂But interactions with peripheral(张姓的来源和历史边缘的) members of our social network matter for our well-being also.＂
