Hot weather ______ the bacteria in milk rapidly, so milk remains fresh for just two days in summer.

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问题 Hot weather ______ the bacteria in milk rapidly, so milk remains fresh for just two days in summer.

选项 A、produces
B、multiplies
C、appears
D、preserves

答案B

解析 题意是:炎热的天气使牛奶中的细菌迅速______,所以在夏天牛奶只能在两天内保持新鲜。[D]multiplies“使繁殖”,符合题意。[A]produces“生产”,形容细菌的增多用生产不合适;[C]appcars“出现”,为不及物动词,不能带宾语;[D]preserves“保存”,说细菌迅速保存讲不通。因此,这三项都不符合题意。
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