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1、职称英语等级考试试题 -综合 A3第 3 局部：概括大意与完成句子第 23 30 题，每题 1 分，共 8 分 阅读下面这篇短文，短文后有 2 项测试任务：1第2326题要求从所给的 6个选项中为第 2,3,5和 6段每段选择 1个正确的 小标题；2第 2730题要求从所给的 6 个选项中选择 4个正确选项，分别完成每个句 子。请将答案涂在答题卡相应的位置上。Keeping Cut Flowers1 While everybody enjoys fresh cut flowers around his house, few people know how to keep them for as
2、 long as possible. This may be done by keeping in mind a few simple facts.2 An important thing to remember about cut flowers is that they are sensitive to temperature. For example, studies have shown that cut earnations康乃馨retain their freshness eight times longer when kept at 12oC than when kept at
3、260c. Keeping freshly harvested flowers at the right temperatures is probably the most important aspect of flower care.3 Flowers are not intended by nature to live very long. Their biological purpose is simply to attract birds or insects, such as bees, for pollination 授粉 . After that, they quickly d
4、ry up and die. The process by which flowers consume oxygen and produce carbon dioxide 二氧化碳 , called respiration 呼吸, generates the energy the flower needs to give the flower its shape and colour. The making of seeds also depends on this energy. While all living things respire, flowers have a high lev
5、el of respiration. A result of all this respiration is heat, and for flowers the level of heat relative to the mass of the flower is very high. Respiration also brings about the eventual death of the flower. Thus the greater the level of respiration, the sooner the flower dies.4 How, then, to contro
6、l the rate at which flowers die? By controlling respiration. How is respiration controlled? By controlling temperature. We know that respiration produces heat, but the reverse is also true. Thus by maintaining low temperatures, respiration is reduced and the cut flower will age more slowly.5 Another
7、 vital factor in keeping cut flowers is the quality of the water in which they are placed. Flowers find it difficult to “ drink water that is dirty or otherwise polluted. Even when water looks and smells clean, it almost certainly contains harmful substances that can endanger the flowers. To rid the
8、 water of these unwanted substances, household chlorine bleach 含( 氯漂白剂 ) can be used in small quantities. It is recommended that 15 drops of chlorine bleach(at 4% solution) be added to each litre of water. The water and solution should also be replaced each day.A Control of RespirationB Beauty of Fr
9、esh Cut FlowersC Role of RespirationD Most Important Aspect of Flower CareE Need for Clean WaterF Ways of Stopping Respiration23 Paragraph 224 Paragraph 325 Paragraph 426 Paragraph 527 A few simple facts will help you keep cut flowers28 Respiration plays a key role29 The aging of cut flowers can be slowed downflowers is30 Another important way to prolong the life of cutA by keeping its original shape and colourB in the life of the cut flowerC to produce carbon dioxideD for as long as possibleE by controlling temperatureF to replace the water and solution every day