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Passage Three The study of ecology is important for everyone who cares about our world. Air, water, and land -- we would not live without any of these. But what do we mean by land It is the earth beneath our feet, wherever we are. It is mountains and plains. It is wide fields for growing com and wheat. Or it may be an airfield or a parking lot or a highway or a whole city -- land covered with cement, asphalt, and buildings. Land is the solid part of the Earth. Land is the soil plants grow in. That is the most important things about the land -- it is the place where green plants grow. Without green plants there would be not life on Earth. Green leaves make oxygen. All of us -- ants, elephants, people, every living creature -- must have oxygen to stay alive. We breathe in oxygen and our bodies use it. Carbon dioxide is formed in the process and we breathe it out. Leaves use carbon dioxide along with water to make food for plants. Then they give off oxygen. This process has been going on for millions of years. It is part of the pattern of our natural life on Earth. This pattern had changed very little for millions of years before people arrived on Earth. People found ways to improve their lives by changing nature, by trying to make nature fit in with their way of life. Warm houses in winter, electric lights at night, factories to produce our food, our clothes, our gadgets(零用品) -- all this people have accomplished. And we learned to grow more food on the land than nature could grow without our help. All this is good -- up to a point. But it has gone too far. We have produced too much and we have failed to see what this was doing to our world. We have not understood the ways in which all living things on Earth depend on one another. We ourselves have increased until the sheer numbers of people on Earth have upset the balance of nature. The best title for this passage is ______.
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In 1959 the (41) American family paid $ 989 (42) a year’ s supply of food. In 1972 the family paid $1 311. That was a price (43) of nearly one-third. Every family has (44) this sort of experience. Everyone agrees that the cost of (45) a family has risen sharply. But there is less agreement (46) reasons for the rise are being discussed. Who is really (47) Many blame the farmers who (48) the vegetables, fruit, meat, eggs and cheese (49) stores offer for (50) . According to the U.S. Department of (51) , the farmer’s share of the $ 1 311 spent by the family in 1972 was $ 521. This was thirty-one percent (52) than the farmer had received in 1959. But farmers claim that this increase was very small (53) to the increase in their cost of (54) . Farmers tend to blame others for the sharp (55) in food prices. They particularly blame those who (56) the farm products after the products leave the farm. These (57) truck drives, meat packers, manufacturers of packages and other food containers, and the (58) of stores where food is sold. They are among the "middlemen" who stand (59) the farmer and the people who buy and eat the food. (60) middlemen the ones to blame for food price
在面向对象模型中，子类的对象拥有其超类的对象的全部属性和方法，称为子类对超类的 【19】 。
Passage Two It is a fair bet that more than half of the PCs bought this Christmas in America for less than $1 000 will have AMD rather than Intel inside. Not content with this seasonal miracle, Advanced Micro Devices is bidding to loosen Intel’s grip on the more profitable high end of the market too. It could well succeed. For most of its existence, AMD has lived in the shadow of the deal that it did with Intel in 1982. To power its PCs, IBM had decided to buy Intel’s new x-86 chips, but wanted a second supplier to keep Intel under control. Under the terms of the agreement, Intel got the contract, but had to share its intellectual property with the smaller AMD. Intel broke the arrangement, AMD started a lawsuit, and thus began nearly a decade of bitter legal battles between the two companies. The conflict misrepresented AMD’s business, absorbed management energy and weakened investor confidence. By selling cheap Intel clones(克隆产品), AMD staggered (蹒跚，摇晃) on, sometimes quite successfully, especially if Intel was late to market with a new product. But despite the support of computer makers complaining under Intel’s dominance, trying to get a lift on the back of an ill-tempered 8001b gorilla(大猩猩) was proving a risky form of existence. Eventually, under a settlement in 1995, AMD gave up any rights to Intel microcode. It was confident that its home-grown k5 would give Intel’s Pentium a run for its money, while a new $1.8 billion plant in Texas would meet demand and match Intel’s manufacturing skills. It did not. Design faults put the k5 more than two years behind the Pentium, and the Austin plant lay largely idle. ______ was proving a risky form of existence.
花色冷盘用料量多、品种多，故在宴席中往往单上便可满足食用要求。( )
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