2021职称英语综合A级：概括大意练习及答案(3)2021年职称英语综合类A级.doc

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1、2021职称英语综合A级：概括大意练习及答案(3) 2021年职称英语综合类A级概括大意与完成句子题Keeping Cut Flowers1 While everybody enjoys fresh cut flowers around their house, few people know how to keep them for as 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 th

2、at they are sensitive to temperature.For e_ample, studies have shown that cut carnations （康乃馨） retain their freshness eight times longer when kept at 12 than when kept at 26.Keeping freshly harvested flowers at the right temperatures is probably the most important aspect of flower care.3 Flowers are

3、 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 dry up and die.The process by which flowers consume o_ygen and produce carbon dio_ide （二氧化碳）, called respiration （呼吸）, generates the e

4、nergy the flower needs to give the flower its shape and color.The making of seeds also depends on this energy.While all living things respire, flowers have a high level 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 ve

5、ry 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 control the rate at which flowers die? By controlling respiration.How is respiration controlled? By controlling temperature.We know that respir

6、ation 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 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 d

7、irty or otherwise polluted.Even when water looks and smells clean, it almost certainly contains harmful substances that can endanger the flowers.To rid the water of these unwanted substances, household chlorine bleach （漂白剂） can be used in small quantities.It is recommended that 15 drops of chlorine

8、bleach （at 4% solution） be added to each litre of water.The water and solution should also be replaced each day.1 Paragraph 2.2 Paragraph 3.3 Paragraph 4.4 Paragraph 5.A Control of RespirationB Beauty of Fresh Cut FlowersC Role of RespirationD Most Important Aspect of Flower CareE Need for Clean Wat

9、erF Ways of Stopping Respiration5 A few simple facts will help you keep cut flowers.6 Respiration plays a key role.7 The aging of cut flowers can be slowed down.8 Another important way to prolong the life of cut flowers is.A by keeping its original shape and colorB in the life of cut flowersC to produce carbon dio_ideD for as long as possibleE by controlling temperatureF to replace the water and solution every day【参考答案】1.D 2.C 3.A 4.E5.D 6.B 7.E 8.F第 4 页 共 4 页