高考英语复习备考:同源高考----修复师让化石“活”了起来等3则.docx
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1、高考英语复习备考:同源高考一修复师让化石“活” 了起来等3那么修复师让化石“活” 了起来化石被发现时通常被包裹在层层的岩石中,很少有人能认出它们是什么。修复师必须 移除周围的积物,才能让古老的生物尽可能呈现出最原始的状态。当然,这需要修复师们 极大的专注和耐心。Restorer Luo Yongming, 51, sits unmoving for almost an hour, staring into the microscope as he uses a pneumatic pen on a crinoids fossil. Crinoids are a family of marine
2、 animals that still exist today as starfish and sea urchins, and the part Luo is cleaning is only 3 to 4 centimeters long. For most people, the process is repetitive and boring, but not for Luo. Touching species from ancient times and trying to restore them to their original states is like talking t
3、o history and preserving ancestral memories. The more I restore, the more I feel the magic, he said.When Luo was young, he played in the mountains around the factory where his father worked. He found many stones containing fossilized insects, which first aroused his interest. He later studied mining
4、 at college and then joined a geological prospecting team after graduation.In 1998, a friend brought a crinoids fossil for restoration to the office next to Luos at the geological investigation research institute. Seeing the elderly researchers wearing reading glasses and trembling as they handled t
5、he fossil, Luo offered to help. 4 trembling是seeing的宾语补足语。II. Text-centered chunksstare into凝视;注视offer to do主动去做take a break 休息一下新型智能义肢为方便缺失手臂的残疾人的生活,上海交大研究人员研发出了一款技术先进的义肢。Gu Guoying and his colleagues at Shanghai Jiao Tong University, in China, have just come up with what looks to be a significant a
6、dvancean affordable prosthetic hand that not only responds like a real one to signals from the wearers brain, but is also able to signal back to the brain what it is touching and doing.The whole hand is covered with a flexible elastomeric (弹性体)layer to imitate skin and is attached to the users resid
7、ual limb. In contrast to current models, which are electrically powered, the new prosthetic hand is powered by a compressed air pump. This reduces its weight below 300 gramshalf that of some current models.The hand uses similar signal processing algorithms (算法)to other prosthetics on the market. The
8、 big advance is that it does not require invasive surgery or electronic implants into the residual limb to communicate with the users brain. Sensors on the skin record electrical signals from the remaining arm muscles. The signals then are interpreted by pattern recognition software that sends appro
9、priate commands to the pump to move the artificial hand. Meanwhile, other signals travel in the opposite direction from sensors in the hands fingertips to nerves in the arm, from which they are relayed to the brain and provide a sense of touch. The result is something which responds like a hand and
10、feels like one to the user.Dr Gu and his colleagues compared the efficacy of their invention with that of existing models using tests borrowed from research into strokes and spinal cord injuries. These included writing, grasping and lifting objects, and lifting food to the mouth. Normally, they foun
11、d it worked betterparticularly for delicate tasks like handling fragile objects, petting a cat and shaking hands.The other advantage of Dr Gu and his colleagues invention is that it is cheap. The components it is made from cost about $500. Existing models may sell for $10, 000 or more. If it goes in
12、to production, that will permit the transformation of many more of the lives of the people who have lost a hand, or were born without one.Reading check1. What makes the prosthetic hand an advance?A. Its shape. B. Its functions.C. Its structure. D. Its skin.2. Whats the advantage of the power system
13、of the new hand?A. It weighs less.B. Ifs more powerful.C. It costs less.D. Its more energy-efficient.3. What does the underlined word “residual” in paragraph 2 probably mean?A. Injured. B. Remaining.C. Missing. D. Artificial.4. What can we infer from the last paragraph?A. We can buy the new prosthet
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