题型:阅读理解 题类:常考题 难易度:普通
河南省豫北名校联盟2017届高三上学期英语精英对抗赛试卷
Most academics would view a post at an elite university like Oxford or Harvard as the crowning achievement of a career—bringing both honour and access to better wine cellars. But scholars desire such places for reasons beyond glory. They believe perching on one of the topmost branches of the academic tree will also improve the quality of their work, by bringing them together with other geniuses with whom they can collaborate and who may help spark new ideas. This sounds reasonable. Unfortunately,as Albert Laszlo Barabasi of Northeastern University,in Boston (and also, it must be said, of Harvard), shows in a study published in Scientific Reports, it is not true.
Dr Barabasi and his team examined the careers of physicists who began publishing between 1950 and 1980 and continued to do so for at least 20 years. They ranked the impact of the institutions these people attended by counting the number of citations each institution's papers received within five years of publication. By tracking the association of individual physicists and counting their citations in a similar way, Dr Barabasi was able to work out whether moving from a low to a high-ranking university improved a physicist's impact. In total, he and his team analysed 2,725 careers.
They found that, though an average physicist moved once or twice during his career, moving from a low-rank university to an elite one did not increase his scientific impact. Going in the opposite direction, however, did have a small negative influence. The consequence is that elite university do not,at least as far as physicists are concerned,add value to output. That surprising conclusion is one which the authorities in countries such as Britain, who are seeking to concentrate expensive subjects such as physics in fewer, more elite institutions—partly to save money, but also to create what are seen as centers of excellence—might wish to consider.
The U.S. has countless secret swimming holes throughout most states, many of which you've likely never heard of unless you're from the area.
Havasu Falls (Arizona) | This attractive waterfall in the Grand Canyon is undoubtedly a destination spot requiring a 10-mile walk to the falls. You can take a guided tour to the falls, or make it on your own. The Havasu Falls are on the Havasupai Indian Reservation, which means you'll need to get a permit to visit — this has become increasingly difficult as more people discover this hidden place. |
Hamilton Pool (Austin) | Hamilton Pool was created when an underground river's roof fell down suddenly; exposing what is now the swimming hole and creating a 50-foot waterfall that flows over the above limestone(石灰岩). You'll have to reserve beforehand to gain entry to the Hamilton Pool Preserve. |
Chutes and Ladders (Maui) | To get to this secret swimming hole, you'll have to take a rope 40 feet down the face of a cliff, and then climb down about 8 feet of lava rock to the pool. Once there, however, you'll be glad you made the journey. The swimming hole is on the edge of the ocean — a natural pool, you could say — with a depth that invites you to jump in without crowds of people around to watch. |
Homestead Crater (Utah) | The Homestead Crater is hidden under a rock dome(圆顶) with an opening at the top that allows for sunlight and air. It was once only accessible by that top opening, but there is now easy access through a side path for visitors. Go for a swim in this beautiful mineral water spring. |
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