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危险系数只适用于评价符合线性假说的______效应
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The typical pre-industrial family not only had a good many children, but numerous other dependents as well — grandparents, uncles, aunts and cousins. Such "extended" families were suited for survival in slow paced (47) societies. But such families are hard to (48) . They are immobile. Industrialism demanded masses of workers ready and able to move off the land in pursuit of jobs, and to move again whenever necessary. Thus the extended family (49) shed its excess weight and the so- called "nuclear" family emerged — a stripped-down, portable family unit (50) only of parents and a small set of children. This new style of family, far more (51) than the traditional extended family, became the standard model in all the industrial countries. Super-industrialism, however, the next stage of eco-technological development, (52) even higher mobility. Thus we may expect many among the people of the future to carry the streamlining process, a step further by remaining children, cutting the family down to its more (53) components, a man and a woman. Two people, perhaps with matched careers, will prove more efficient at navigating through education and social status, through job changes and geographic relocations, than the ordinarily child-cluttered family. A (54) maybe the postponement of children, rather than childlessness. Men and women today are often torn in (55) between a commitment to career and a commitment to children. In the future, many (56) will side aside this problem by deferring the entire task of raising children until after retirement. A. transplant B. solution C. gradually D. transport E. elemental F. conflict G. continually H) mobile I) couples J) agricultural K) including L) compromise M) requires N) primary O) consisting
Why does cream go bad faster than butter Some researchers think that it comes down to the structure of the food, not its chemical composition -- a finding that could help rid some processed foods of chemical preservatives. Cream and butter contain much the same (36) , so why cream should sour much faster has been a (37) . Both are emulsions — tiny globules of one liquid evenly (38) throughout another. The difference lies in what’s in the globules and what’s in the surrounding. In cream, fatty globules (39) about in a sea of water. In butter, globules of a watery (40) are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the (41) . This means that in cream, the bacteria are free to grow throughout the mixture. When the situation is (42) , the bacteria are locked away in (43) buried deep in the sea of fat. (44) .They also slowly poison themselves with their waste products. In butter, there is a self-limiting system which stops the bacteria growing. (45) .They believe that it will be possible to make the emulsions used in salad cream, for instance, more like that in butter. (46) . Why does cream go bad faster than butter Some researchers think that it comes down to the structure of the food, not its chemical composition -- a finding that could help rid some processed foods of chemical preservatives. Cream and butter contain much the same (36) , so why cream should sour much faster has been a (37) . Both are emulsions — tiny globules of one liquid evenly (38) throughout another. The difference lies in what’s in the globules and what’s in the surrounding. In cream, fatty globules (39) about in a sea of water. In butter, globules of a watery (40) are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the (41) . This means that in cream, the bacteria are free to grow throughout the mixture. When the situation is (42) , the bacteria are locked away in (43) buried deep in the sea of fat. (44) .They also slowly poison themselves with their waste products. In butter, there is a self-limiting system which stops the bacteria growing. (45) .They believe that it will be possible to make the emulsions used in salad cream, for instance, more like that in butter. (46) .
UNSCEAR 1986年报告提出的辐射诱发肿瘤潜伏期中位时间为
Most people will probably think that literature is a form of art that can be enjoyed without formal instruction. However, people with (67) knowledge of literature may miss a lot (68) reading a novel, short story, poem, play, or (69) . These readers are comparable to the (70) at a football game who watch the game and (71) it without really understanding the complex movements (72) on the field. Although they may enjoy the (73) , many spectators watch only the ball (74) , missing entirely the contribution of other members (75) the total play as well as the intricacies occurring within the (76) . A person who understands football — (77) better vet, has played the game — is more capable (78) judging when a team is playing well or (79) and is also likely to enjoy a "good" game more.The (80) is true of reading literature. Most people have read numerous (81) works, but many do not understand or (82) the author’s skill in communicating. Just like those spectators of the football game, they can hardly enjoy a "good" book.This book (83) intended to help you learn to (84) attention not only on what happens, but on (85) it happens and how the author has (86) it — to analyze and evaluate literary works so that you can fully experience and appreciate them. 85（）
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