题型:阅读理解 题类:真题 难易度:普通
2013年高考英语真题试卷(江苏卷)
If a diver surfaces too quickly, he may suffer the bends. Nitrogen (氮) dissolved (溶解) in his blood is suddenly liberated by the reduction of pressure. The consequence, if the bubbles (气泡) accumulate in a joint, is sharp pain and a bent body—thus the name. If the bubbles form in his lungs or his brain, the consequence can be death.
Other air-breathing animals also suffer this decompression (减压) sickness if they surface too fast: whales, for example. And so, long ago, did ichthyosaurs. That these ancient sea animals got the bends can be seen from their bones. If bubbles of nitrogen form inside the bone they can cut off its blood supply. This kills the cells in the bone, and consequently weakens it, sometimes to the point of collapse. Fossil (化石) bones that have caved in on themselves are thus a sign that the animal once had the bends.
Bruce Rothschild of the University of Kansas knew all this when he began a study of ichthyosaur bones to find out how widespread the problem was in the past. What he particularly wanted to investigate was how ichthyosaurs adapted to the problem of decompression over the 150 million years. To this end, he and his colleagues traveled the world's natural-history museums, looking at hundreds of ichthyosaurs from the Triassic period and from the later Jurassic and Cretaceous periods.
When he started, he assumed that signs of the bends would be rarer in younger fossils, reflecting their gradual evolution of measures to deal with decompression. Instead, he was astonished to discover the opposite. More than 15% of Jurassic and Cretaceous ichthyosaurs had suffered the bends before they died, but not a single Triassic specimen (标本) showed evidence of that sort of injury.
If ichthyosaurs did evolve an anti-decompression means, they clearly did so quickly—and, most strangely, they lost it afterwards. But that is not what Dr Rothschild thinks happened. He suspects it was evolution in other animals that caused the change.
Whales that suffer the bends often do so because they have surfaced to escape a predator (捕食动物) such as a large shark. One of the features of Jurassic oceans was an abundance of large sharks and crocodiles, both of which were fond of ichthyosaur lunches. Triassic oceans, by contrast, were mercifully shark- and crocodile-free. In the Triassic, then, ichthyosaurs were top of the food chain. In the Jurassic and Cretaceous, they were prey (猎物) as well as predator—and often had to make a speedy exit as a result.
The jobs of the future have not been invented, {#blank#}1{#/blank#} By helping them develop classic skills that will serve them well no matter what the future holds.
⒈Curiosity
Your children need to be deeply curious. {#blank#}2{#/blank#} Ask kids, “What ingredients (配料) can we add to make these pancakes even better next time” and then try them out. Did those ingredients make the pancakes better? What could we try next time?
⒉Creativity
True creativity is the ability to take something existing and create something new from it {#blank#}3{#/blank#}There are a dozen different things you can do with them. Experimenting with materials to create something new can go a long way in helping them develop their Creativity.
⒊Interpersonal Skills
Understanding how others feel can be a challenge for kids. We know what is going on inside our own head, but what about others? Being able to read people helps kids from misreading a situation and jumping to false conclusions. {#blank#}4{#/blank#} “Why do you think she is crying?” “Can you tell how that man is feeling by looking at his face?” “If someone were to do that to you, how would you feel?”
⒋Self Expression
{#blank#}5{#/blank#} There are many ways to express thoughts and ideas ¡ª music, acting, drawing, building, photography. You may find that your child is attracted by one more than another.
A. Encourage kids to cook with you. B. And we can't forget science education. C. We can give kids chances to think about materials in new ways. D. So how can we help our kids prepare for jobs that don't yet exist? E. Gardening is another great activity for helping kids develop this skill. F. We can do this in real life or ask questions about characters in stories. G. Being able to communicate ideas in a meaningful way is a valuable skill. |
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