单选题
It may be inferred from the passage that, in contrast to their present view, microbiologists once believed that
A、
only a single feature of endospore biology was responsible for their success
B、
potentially, a canning process could be developed that was capable of destroying all endospores
C、
ultraviolet radiation was a possible means of destroying microorganisms that practice cellular dormancy
D、
cellular mitosis was the root cause of the resilience of the microorganisms under discussion
E、
(E) only single-celled organisms, like those of fungal spores, could practice cellular dormancy
【正确答案】
D
【答案解析】
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