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¡¡¡¡1 . Insgroupsto remain in existence, a profit-making organization must, in the long run, produce something consumers consider useful or desirable.
¡¡¡¡2 . The greater the population there is in a locality, the greater the need there is for water, transportation, and disposal of refuse.
¡¡¡¡3 . It is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one’s meaning.
¡¡¡¡4 . With modern offices becoming more mechanized, designers are attempting to personalize them with warmer, less severe interiors.
¡¡¡¡5 . Typical of the grassland dwellers of the continent is the American antelope, or pronghorn.
¡¡¡¡6 . Of the millions who saw Haley’s comet in , how many people will live long enough to see it return in the twenty-first century.
¡¡¡¡7 . Anthropologists have discovered that fear, happiness, sadness, and surprise are universally reflected in facial expressions.
¡¡¡¡8 . Because of its irritating effect on humans, the use of phenol as a general antiseptic has been largely discontinued.
¡¡¡¡9 . The difference between libel and slander is that libel is printed while slander is spoken.
¡¡¡¡10 . The knee is the jointswheresthe 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.
¡¡¡¡13 . Anthropology is a science in that anthropologists use a rigorous set of methods and techniques to document observations that can be checked by others.
¡¡¡¡14 . Fungi are important in the process of decay, which returns ingredients to the soil, enhances soil fertility, and decomposes animal debris.
¡¡¡¡15 . When it is struck, a tuning fork produces an almost pure tone, retaining its pitch over a long period of time.
¡¡¡¡16 . Although pecans are most plentiful in the southeastern part of the United States, they are found as far north as Ohio and Illinois.
¡¡¡¡17 . Essentially, a theory is an abstract, symbolic representation of what is conceived to be reality.
¡¡¡¡18 . Long before children are able to speak or understand a language, they communicate through facial expressions and by making noises.
¡¡¡¡19 . Thanks to modern irrigation, crops now grow abundantly in areasswheresonce nothing but cacti and sagebrush could live.
¡¡¡¡20 . The development of mechanical timepieces spurred the search for more accurate sundials with which to regulate them.
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