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The International Science Olympiads are held once every two years.
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"Salty" Rice Plant Boosts Harvests
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
Tim Flowers and Tony Yeo, from Sussex University's School of Biological Sciences, have spent several years researching how crops, such as rice, could be made to grow in water that has become salty.
The pair have recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice.
It is estimated that each year more than 10m hectares (公顷) of agricultural land are lost because salt gets into the soil and stunts (妨碍生长) plants. The problem is caused by several factors. In the tropics, mangroves (红树林) that create swamps (沼泽) and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep (渗透)in. In Latin America, irrigation often causes problems when water is evaporated (蒸发) by the heat, leaving salt deposits behind.
Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
To overcome these problems, Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants' growth. They have started to breed these characteristics into a new rice crop, but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use.
Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants. Land that has been abandoned to nature will then be able to bloom again, providing much needed food in the poorer countries of the world.
第 41 题 Which of the following statements about Flowers and Yeo is true？
Ford
1．Ford’S great strength was the manufacturing process--not invention．Long before he started a car company,he was a worker，known for picking up pieces of metal and wire and turning them into machines．He started putfing cars together in l891．Although it was by no means the first popular automobile，the Model T showed the world just how creative Ford was at combining technology and market．
2．The company’S assembly line alone threw America'sIndustrial Revolution into overdrive(高速运转)．Instead of having workers put together the entire car，Ford’S friends,who were great toolmakers from Scotland，organized teams that added parts to each Model T as it moved down a line．By the time Ford’S Highland Park plant was humming (嗡嗡作响)along in l914，the world’Sfirst automatic conveyor belt could turn out a car every 93 minutes．
3．The same year Henry Ford shocked the world with the$5-a-day minimum wage scheme the greatest contribution he had ever made．The average wage in the auto industry then was$2．34 for a 9-hour shift．Ford not only doubled that，he also took an hour off the workday．In those years it was unthinkable that a man could be paid thatmuch for doing something that didn’t involve an awful lot of training or education．The Wall Street Journal called the plan“an economic crime”．and critics everywhere laughed at Ford．
4．But as the wage increased later to daily$10。it proved a critical component of Ford’s dream to make the automobile accessible(可及的)to all．The critics were too stupid to understand that because Ford had lowered his costs per car,the higher wages didn’t matter--except for making it possible for more people to buy cars．
第 23 题 Paragraph 1_________
A．convey B．destroy C．modify D．acquire
Living with Computer
After too long on the Net, even a phone call can be a shock. My boyfriend's Liverpudlian accent suddenly becomes hard to understand after the clarity of his words on screen; a secretary's tone seems more rejecting than I'd imagined it would be. Time itself becomes fluid - hours become minutes, and alternately seconds stretch into days.Weekends, once a highlight of my week, are now just two ordinary days.
For the last three years, since I stopped working as a producer for Charlie Rose, I have done much of my work as a tele-commuter(远程交谈者)I submit articles and edit them via E-mail and communicate with colleagues on Internet mailing lists. My boyfriend lives in England, so much of our relationship is computer-mediated.
If I desired, I could stay inside for weeks without wanting anything. I can order food,and manage my money, love and work. In fact, at times I have spent as long as three weeks alone at home, going out only to get mail and buy newspapers and groceries. I watched most of the blizzard(暴风雪) of '96 on TV.
But after a while, life itself begins to feel unreal. I start to feel as though I've merged with my machines, taking data in, spitting them back out, just another node (节点) on the Net. Others on line report the same symptoms. We start to strongly dislike the outside forms of socializing. It's like attending an meeting in a bar with everyone holding a half-sipped drink. We have become the Net opponents' worst nightmare.
What first seemed like a luxury, crawling from bed to computer, not worrying about hair, and clothes and face, has become an avoidance, a lack of discipline. And once you start replacing real human contact with cyber-interaction(网上交流), coming back out of the cave can be quite difficult.
At times, I turn on the television and just leave it to chatter in the background,something that I'd never done previously. The voices of the programs soothe (安慰) me,but then I'm jarred(使感不快) by the commercials. I find myself sucked in by soap operas.or compulsively(强制性地) needing to keep up with the latest news and the weather."Dateline," "Frontline," "Nightline," CNN, every possible angle of every story over and over and over, even when they are of no possible use to me. Work moves from foreground to background.
第 36 题 Compared with the clear words of her boyfriend on screen, his accent is
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