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3. 下列哪些因素能引起食品腐败（）
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2. 引起果酱腐败的微生物是（）
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They _____ on a trip in April last month.
四、短文填空（本题10个空，每空只填一词，每空1分，共10分）Jimmy is a student. Two months ago, he found three little homeless dogs 46.______ his way home and brought them home. He looked after them 47.______ (care). The dogs 48.______ (bring) Jimmy much joy and made him happy. The dogs became 49.______ (healthy) and fatter, and looked really lovely, Jimmy loved them very much. But now Jimmy feels 50.______ (worry). He has some problems. First, he has 51 .r______ out of money to buy dog food. Second, the dogs have been so big 52.______ there is no enough room for them. Third, the dogs have become too noisy, so his mother can't 53.______ (忍受) them. Some of Jimmy's friends are trying to give Jimmy some 54.______ (suggestion). Some say Jimmy should put up dog's pictures in the street and look for their new owners. Some say he should ask the TV station for 55 .h______ . Do you have any other good ideas?
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