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以下语法题百思不得要领，欢迎大家来讨论，大部分是改错题，到底哪里有错，怎么改呢？离考试又近了一天，急切盼望各位的意见中
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19. Automation involves the addition of sensors and electronic controls devices to mechanized processes of production and distribution.
38. Allotropes are the individual form of an element that occur when more than one type of bonding between atoms of the element is possible.
39. The lungs are susceptible to a wide variety of diseases because they are constantly in contact to the external environment and the impurities it contains.
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14．All eels spawn in the sea, the eggs hatching into transparent, ribbonlike larvae that drift about, feeding until they metamorphose into small eels.
24. While infancy, the period from birth until the age of two, a child grows to approximately half of his or her adult height.
32. In a vacuum discharge tube at ordinary voltages and currents, neon glows reddish-orange and is the mostly intense of all the rare gases.
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36. Essential a nineteenth-century instrument, the calliope was usually played outdoors and was a part of fairs, holiday gatherings, and other such activities.
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22. In the spring, maple sap is drawn off, strained and concentrates by boiling to produce syrup and sugar.
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34. The differences of many ice creams are the result of the quality, richness, and freshness of the ingredients.
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39. All of planets in the solar system are surrounded by differing kinds and amounts of gases.  
[此贴子已经被作者于2005-5-2 19:56:31编辑过] | 
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发表于 2005-5-1 21:28:00
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