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Many college students today own personal computer that cost anywhere from $1,000 to perhaps %5,000 or more. (26)_____, it is not uncommon for them to purchase (27)_____costing another several hundred dollars. Twenty years ago, computers were (28) _____, but they were very large and extremely expensive. Few, if any,(29) _____ purchased computers for home use. Over the years, the price ofthe “guts” of a computer---its memory—has declined to less than a thousandth of the price per unit of memory that prevailed twenty years ago. This is the main reason why computers cost so much less today than they used to. Moreover, (30) ______improvements have made it possible to (31) _____memory circuitry that is small enough to fit into the portable personal computers that many of us own and use. (32)_____, as the price of computation has declined the average consumer and business have spent more on purchasing computers. (33)_____,improved agricultural technology,hybrid(杂交)seeds,(34)______animal breeding, and so on have vastly increased the amount of output a typical farmer can produce. The prices of goods such as meats and grains have fallen sharply relative to the prices of most other goods and services. As agricultural prices have fallen, many households have decreased their total expenses on food. Even though the (35)_______of a product purchased generally increases when its price falls, total expenses on it may decline. 28（）
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Many college students today own personal computer that cost anywhere from $1,000 to perhaps %5,000 or more. (26)_____, it is not uncommon for them to purchase (27)_____costing another several hundred dollars. Twenty years ago, computers were (28) _____, but they were very large and extremely expensive. Few, if any,(29) _____ purchased computers for home use. Over the years, the price ofthe “guts” of a computer---its memory—has declined to less than a thousandth of the price per unit of memory that prevailed twenty years ago. This is the main reason why computers cost so much less today than they used to. Moreover, (30) ______improvements have made it possible to (31) _____memory circuitry that is small enough to fit into the portable personal computers that many of us own and use. (32)_____, as the price of computation has declined the average consumer and business have spent more on purchasing computers. (33)_____,improved agricultural technology,hybrid(杂交)seeds,(34)______animal breeding, and so on have vastly increased the amount of output a typical farmer can produce. The prices of goods such as meats and grains have fallen sharply relative to the prices of most other goods and services. As agricultural prices have fallen, many households have decreased their total expenses on food. Even though the (35)_______of a product purchased generally increases when its price falls, total expenses on it may decline. 33（）
Questions 9 to 11 are based on the conversation you have heard. What’s the man's telephone number?（）
Many college students today own personal computer that cost anywhere from $1,000 to perhaps %5,000 or more. (26)_____, it is not uncommon for them to purchase (27)_____costing another several hundred dollars. Twenty years ago, computers were (28) _____, but they were very large and extremely expensive. Few, if any,(29) _____ purchased computers for home use. Over the years, the price ofthe “guts” of a computer---its memory—has declined to less than a thousandth of the price per unit of memory that prevailed twenty years ago. This is the main reason why computers cost so much less today than they used to. Moreover, (30) ______improvements have made it possible to (31) _____memory circuitry that is small enough to fit into the portable personal computers that many of us own and use. (32)_____, as the price of computation has declined the average consumer and business have spent more on purchasing computers. (33)_____,improved agricultural technology,hybrid(杂交)seeds,(34)______animal breeding, and so on have vastly increased the amount of output a typical farmer can produce. The prices of goods such as meats and grains have fallen sharply relative to the prices of most other goods and services. As agricultural prices have fallen, many households have decreased their total expenses on food. Even though the (35)_______of a product purchased generally increases when its price falls, total expenses on it may decline. 29（）
To get a sense of how women have progressed in science take a quick tour of the physics department at the University of California, Berkeley.This is a storied place the 36 of some of the most important discoveries in modern science-starting with Ernest Lawrence’s invention of the cvclotron(回旋加速器)in 1931.A generation ago female faces were 37 and,even today,visitors walking through the first floor of LeConte Hall will See a full corridor of exhibits 38 the many distinguished physicists who made history here, 39 all of there white males But climb up to the third floor and you’ll see a 40 display.There,among the photos of current facnlty members and students are portraits of the 41 head of the department,Marjorie Shapiro and four other women whose reseaich 42 everything from the mecheanics of the universe to the smallest particles of matter.A sixth woman was hired just two weeks ago.Although they’re Still only about 10 percent of the physics faculty,women are clearly a presence here.And the real 43 may be in the smaller photos to the right graduate and undergraduate students about 20 percent of them female.Every years Berkeley sends its fresh female physics PhDs to the country’s top universities.That makes Shapiro optimistic but also 44 "I believe things are getting bette "she says "but they’re not getting better as 45 as i would like." 40（）
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