23. Mr. Pasteur believed that .
(A) the water made the meat go bad
(B) the air made the meat go bad
(C) the microbes were already in the meat
(D) the microbes were already in the juice
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統計: A(2), B(9), C(1), D(1), E(0) #803968
統計: A(2), B(9), C(1), D(1), E(0) #803968