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The vegetative forms of most bacteria are killed by drying in air, although the different species exhibit pronounced differences
The vegetative forms of most bacteria are killed by drying in air, although the different species exhibit pronounced differences
admin
2011-01-26
78
问题
The vegetative forms of most bacteria are killed by drying in air, although the different species exhibit pronounced differences in their resistance. The tubercle bacillus is one of the more resistant, and vibrio cholcra is one of the more sensitive to drying In general, the encapsulated organisms are more resistant than the non-encapsulated forms. Spores are quite resistant to drying; the spores of the anthrax bacillus, for example, will germinate alter remaining in a dry condition for years or more. The resistance of the pathogenic forms causing disease of the upper respiratory tract is of particular interest in connection with airborne infection, for the length of time that a droplet remains infective is a result, primarily, of the resistance of the particular microorganism to drying.
The passage uses the term "vegetative forms" to refer to ______.
选项
A、plants that infest human habitations
B、the fact that bacteria are really vegetables
C、the growing stage of the bacteria as opposed to the dormant stage
D、the difficulty in classifying the . types of bacteria
答案
C
解析
此题可用排除法。A,B解为跟植物有关,与原文不符,且细菌不属于植物; D项没有根据,文中未提及;C较恰当,在这里vegetative指的是“生长的,有生长力的”。
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0
考博英语
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