1. Typical[典型的] of the grassland[牧草地] dwellers[居民] of the continent[大陆] is the American antelope[羚羊], or pronghorn[叉角羚].
2. Of the millions who saw Haley’s comet[彗星] in 1986, how many people will live long enough to see it return in the twenty-first century.
3. Anthropologists[人类学家] have discovered that fear[害怕], happiness, sadness, and surprise are universally[全体地] reflected[反射的] in facial expressions[表情].
4. Because of its irritating effect on humans, the use of phenol as a general antiseptic has been largely discontinued.
5. In group to remain in existence, a profit-making organization must, in the long run, produce something consumers consider useful or desirable.
6. The greater the population there is in a locality, the greater the need there is for water, transportation, and disposal of refuse.
7. It is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one’s meaning.
8. With modern offices becoming more mechanized, designers are attempting to personalize them with warmer, less severe interiors.
9. The difference between libel and slander is that libel is printed while slander is spoken.
10. The knee is the joints where the thigh bone meets the large bone of the lower leg.
11. Acids are chemical compounds that, in water solution, have a sharp taste, a corrosive action on metals, and the ability to turn certain blue vegetable dyes red.
12. Billie Holiday’s reputation as a great jazz-blues singer rests on her ability to give emotional depth to her songs.
12. Billie Holiday’s作为一个爵士布鲁斯乐杰出歌手的名声建立在能够赋予歌曲感情深度的能力。
13. Essentially, a theory is an abstract, symbolic representation of what is conceived to be reality.
14. Long before children are able to speak or understand a language, they communicate through facial expressions and by making noises.
15. Thanks to modern irrigation, crops now grow abundantly in areas where once nothing but cacti and sagebrush could live.
16. The development of mechanical timepieces spurred the search for more accurate sundials with which to regulate them.
17. Anthropology is a science in that anthropologists use a rigorous set of methods and techniques to document observations that can be checked by others.
18. Fungi are important in the process of decay, which returns ingredients to the soil, enhances soil fertility, and decomposes animal debris.
19. When it is struck, a tuning fork produces an almost pure tone, retaining its pitch over a long period of time.
20. Although pecans are most plentiful in the southeastern part of the United States, they are found as far north as Ohio and Illinois.
21. Eliminating problems by transferring the blame to others is often called scape-goating.
22. The chief foods eaten in any country depend largely on what grows best in its climate and soil.
23. Over a very large number of trials, the probability of an event’s occurring is equal to the probability that it will not occur.
24. Most substance contract when they freeze so that the density of a substance’s solid is higher than the density of its liquid.
25. The mechanism by which brain cells store memories is not clearly understood.
26. By the middle of the twentieth century, painters and sculptors in the United States had begun to exert a great worldwide influence over art.
27. In the eastern part of New Jersey lies the city of Elizabeth, a major shipping and manufacturing center.
28. Elizabeth Blackwell, the first woman medical doctor in the United States, founded the New York Infirmary, an institution that has always had a completely female medical staff.
28. Elizabeth Blackwell，美国第一个女医生，创建了员工一直为女性纽约诊所。
29. Alexander Graham Bell once told his family that he would rather be remembered as a teacher of the deaf than as the inventor of the telephone.
29. Alexander Graham Bell曾告诉家人，他更愿意让后人记住他是聋子的老师，而非电话的发明者。
30. Because its leaves remain green long after being picked, rosemary became associated with the idea of remembrance.
31. Although apparently rigid, bones exhibit a degree of elasticity that enables the skeleton to withstand considerable impact.
32. That xenon could not FORM chemical compounds was once believed by scientists.
33. Research into the dynamics of storms is directed toward improving the ability to predict these events and thus to minimize damage and avoid loss of life.
34. The elimination of inflation would ensure that the amount of money used in repaying a loan would have the same value a
s the amount of money borrowed.
35. Futurism, an early twentieth-century movement in art, rejected all traditions and attempted to glorify contemporary life by emphasizing the machine and motion.
36. One of the wildest and most inaccessible parts of the United States is the Everglades where wildlife is abundant and largely protected.
37. Lucretia Mott’s influence was so significant that she has been credited by some authorities as the originator of feminism in the United States.
37. Lucretia Mott’s的影响巨大，所以一些权威部门认定她为美国女权运动的创始人。
38. The activities of the international marketing researcher are frequently much broader than those of the domestic marketer.
39. The continental divide refers to an imaginary line in the North American Rockies that divides the waters flowing into the Atlantic Ocean from those flowing into the Pacific.
40. Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them.
41. The annual worth of Utah’s manufacturing is greater than that of its mining and farming combined.
42. The wallflower is so called because its weak stems often grow on walls and along stony cliffs for support.
43. It is the interaction between people, rather than the events that occur in their lives, that is the main focus of social psychology.
44. No social crusade aroused Elizabeth Williams’ enthusiasm more than the expansion of educational facilities for immigrants to the United States.
45. Quails typically have short rounded wings that enable them to spring into full flight instantly when disturbed in their hiding places.
46. According to anthropologists, the earliest ancestors of humans that stood upright resembled chimpanzees facially, with sloping foreheads and protruding brows.
47. Not until 1866 was the fully successful transatlantic cable finally laid.
48. In his writing, John Crowe Ransom describes what he considers the spiritual barrenness of society brought about by science and technology.
48. John Crowe Ransom在他的著作中描述了他认为是由科学技术给社会带来的精神贫困。
49. Children with parents whose guidance is firm, consistent, and rational are inclined to possess high levels of self-confidence.
50. The ancient Hopewell people of North America probably cultivated corn and other crops, but hunting and gathering were still of critical importance in their economy.
51. Using many symbols makes it possible to put a large amount of inFORMation on a single map.
52. Anarchism is a term describing a cluster of doctrines and attitudes whose principal uniting feature is the belief that government is both harmful and unnecessary.
53. Probably no man had more effect on the daily lives of most people in the Untied States than did Henry Ford a pioneer in automobile production.
54. The use of well-chosen nonsense words makes possible the testing of many basic hypotheses in the field of language learning.
55. The history of painting is a fascinating chain of events that probably began with the very first pictures ever made.
56. Perfectly matched pearls, strung into a necklace, bring a far higher price than the same pearls told individually.
57. During the eighteenth century, Little Turtle was chief of the Miami tribe whose territory became what is now Indiana and Ohio.
58. Among almost seven hundred species of bamboo, some are fully grown at less than a foot high, while others can grow three feet in twenty-four hours.
59. Before staring on a sea voyage, prudent navigators learn the sea charts, study the sailing directions, and memorize lighthouse locations to prepare themselves for any conditions they might encounter.
60. Of all the economically important plants, palms have been the least studied.
61. Buyers and sellers should be aware of new developments in technology can and does affect marketing activities.
62. The application of electronic controls made possible by the microprocessor and computer storage have multiplied the uses of the modern typewriter.
63. The human skeleton consists of more than two hundred bones bound together by tough and relatively inelastic connective tissues called ligaments.
64. The pigmentation of a pearl is influenced by the type of oyster in which it develops and by the depth, temperature, and the salt content of the water in which the oyster lives.
65. Although mockingbirds superbly mimic the songs and calls of many birds, they can nonetheless be quickly identified as mockingbirds by certain aural clues.
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