导致果树采后生理病害及农产品加工制品腐败变质的因素有哪些？
参考答案：收获前因素：（1）果实生长发育期间营养失调（2）管理措施不当（3）采收成熟度不当（4）气候异常
收获后因素：1贮运温度（2）湿度失调（3）气体伤害（CO2中毒、低O2伤害、乙烯伤害、其他气体伤害）
农产品加工制品腐败和变质的因素包括物理的、化学的和生物的三种类型：（1）细菌、酵母和霉菌（2）食源疾病（3）昆虫、寄生虫的侵染（4）食品中酶的活动和其他化学反应（5）食品温度控制不当（6）吸水或失水（7）氧参与的反应（8）光（9）时间
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| Mr. Smith 1 in a post office three years ago. When he was sixty, he retired. Now he and his wife stay at home and his children work in 2 city. The old man does all housework and he has nothing to do at home. He likes neither reading nor 3 games. At first he didn't know how to 4 the free time. Mr. Hunt 5 was two years older than him asked to go fishing with him. "It's a good sport," said Mr. Hunt. "I'm sure you'll soon be 6 in it." "That's easy. Go fishing with me tomorrow morning and I'll 7 you." Mr. Smith decided 8 his luck. The following day the two old friends came to a river and began to fish. Suddenly Mr. Smith said, "I say, 9 do those little red things cost?" "You mean the floats (浮子)? Oh, they're cheap. What made you ask me such a 10 ?" "I owe (欠) you for one. Mine has just sunk (下沉)." | ||
| ( )1. A. work ( )2. A. other ( )3. A. playing ( )4. A. spend ( )5. A. who ( )6. A. interesting ( )7. A. discover ( )8. A. trying ( )9. A. how many ( )10. A. problem | B. worked B. the other B. play B. take B. which B. interested B. teach B. to try B. how far B. answer | C. works C. another C. plays C. cost C. what C. interest C. follow C. tried C. how much C. question |