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【单选题】
细菌L型属于
A.
细菌的形态与结构变异
B.
细菌的毒力变异
C.
细菌的耐药性变异
D.
细菌的抗原性变异
E.
细菌的菌落变异
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A.
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B.
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A.
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B.
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C.
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D.
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A.
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B.
a 和 b
C.
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D.
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