肥料的施用应根据鲜切花生长需要，按一定配比施用氮、磷、钾三种元素，不宜单施一种元素。
A、对
B、错

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Keeping Cut Flowers（鲜切花）
1. While everybody enjoys fresh cut flowers around his/her 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 that they are sensitive to temperature.For example,studies have shown that cut carnations（康乃馨）retain their freshness eight times lon-ger when kept at 12℃than when kept at 26℃．Keeping freshly harvested flowers at the right tem-peratures 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 at-tract birds or insects,such as bees,for pollination（授粉）.After that,they quickly dry 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 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 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 control the rate at which flowers die?By controlling respiration.How is respi-ration controlled?By controlling temperature .We know that respiration produces heat,but the re-verse（相反的过程）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 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 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 bleach(at 4%solution)be add-ed to each litre of water. The water and solution should also be replaced each day.
Paragraph 2________
A: Control of Respiration
B: Beauty of Fresh Cut Flowers
C: Role of Respiration
D: Most Important Aspect of Flower Care
E: Need for Cleanwater
F:.Ways of Stopping Respiration
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下图示意的甲、乙两国分别为传统、新兴的鲜切花生产国。读图，完成1—3题。
1、比较甲、乙两国降水特点及其原因①甲国受西风带和暖流影响，全年降水较丰沛且季节分配均匀②甲国受副热带高压带和西风带的交替影响，降水季节差异大③乙国受赤道低压带影响，全年降水丰沛且季节分配均匀④乙国受地形影响，降水季节差异大
[  ]
A．①③B．①④C．②③D．②④
2、与甲国相比，乙国发展鲜切花生产的优势自然条件是①热量丰富②光照充足③地形平坦④水源丰富
[  ]
A．①②B．①④C．②③D．③④
3、与乙国相比，甲国维持其在世界鲜切花市场竞争力的优势条件是
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A．专业化、规模化生产，鲜切花价格较低B．土地丰富，天然花卉品种较多C．培植历史久，劳动力成本较低D．技术含量高，鲜切花质量较优

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(飞机O~l摄氏度机械分级干燥剂埋没干燥法水漫斑温水脱涩法一1~O摄氏度人工分级混果法压花干燥法)
11.填写下列水果和蔬菜的最适贮藏温度:菜花();葡萄()。
12.水果和蔬菜的冷害症状有()、凹陷、不能正常成熟、褐变、腐烂等。
我国目前鲜切花长距离运输主要采用()运输，这样运输速度快，时间较短。花材干燥的常用方法有()、自然风干燥法、()、液剂浸渍法和调节温度与空气压力干燥法。园产品分级可采用()和()。柿子脱涩常用的方法有()、二氧化碳法、()、乙烯脱涩法、乙烯利脱涩法、酒精脱涩法和石灰水脱涩法等。
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有关2008年云南鲜切花的叙述，正确的是（　　）。
A、全国一半鲜切花产自云南
B、出口30多个国家
C、种植面积为52.4万亩
D、产量52.9亿枝
E、出口创汇1.01亿美元

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目前，墨西哥已成为哥伦比亚在美国鲜切花市场的竞争对手，与哥伦比亚相比，墨西哥开拓美国鲜切花市场的优势在于（　）。
A.运费低
B.热量足
C.技术高
D.品种全

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肥料的施用应根据鲜切花生长需要，按一定配比施用氮、磷、钾三种元素，不宜单施一种元素。
A、对
B、错

相关专题：鲜切花

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肥料的施用应根据鲜切花生长需要，按一定配比施用氮、磷、钾三种元素，不宜单施一种元素。A、对B、错

相关专题： 鲜切花

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最新解决用户提交的题

肥料的施用应根据鲜切花生长需要，按一定配比施用氮、磷、钾三种元素，不宜单施一种元素。
A、对
B、错

相关专题：鲜切花