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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
2013-01-29
86
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 cholera 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 after remaining in a dry condition for ten 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 feet 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
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考博英语
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