在冷藏的条件下，水果的保鲜时间长，对这种现象的解释不正确的是
A．温度降低，抑制微生物的繁殖
B．温度降低，水果呼吸作用比较弱
C．温度降低，水果散失水分比较少
D．温度降低，微生物根本不能生活
答案：D
题目分析：温度能影响呼吸作用，主要是影响呼吸酶的活性，一般而言，在一定的温度范围内，呼吸强度随着温度的升高而增强，根据温度对呼吸强度的影响原理，在生产实践上贮藏蔬菜和水果时应该适当降低温度，使蔬菜、水果的呼吸作用减弱，以减少呼吸作用对有机物的消耗、可延长保鲜时间，温度降低，抑制微生物的繁殖，而不是微生物根本不能生活，温度降低，水果的蒸腾作用减弱，因此水果散失水分比较少，起到保鲜作用，故D符合题意。
A true friend is always helpful. I didn’t believe it 36 one thing happened to me when I was in Grade 7. Li Jie was one of my classmates. He and I were also neighbours. He always listened to his mother 37 I didn’t like listening to my mother. I didn’t think it was necessary for 38 to teach me anything. Li Jie knew all about that but he said 39 to me. One weekend, Li Jie invited me to watch a film. I liked films very much so I went to the 40 with him happily. The film was about the love between a 41 and her son. After watching it, I began to know how great the love of the mother was. I felt 42 that I didn’t listen to my mother before. I decided to think more about my mother than about 43 . After I told that to him, Li Jie smiled and said, “It’s really necessary for you to watch such a film. That was a good choice (选择) for both you and me.” Suddenly, I knew 44 he invited me to watch the film. Just at that time, I knew a true friend is always 45 .
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