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情人节（2月14日），美国销售的鲜切玫瑰花多来自哥伦比亚。读下图回答下列问题。
小题1:.与美国相比，在情人节期间，哥伦比亚生产鲜切花的优势自然条件是 （）
A．气温较高
B．降水较丰沛
C．地势较平
D．土壤较肥沃小题2:.美国的农业生产实现了地区生产的专业化，形成了一些农业带（区），图中①处是 （）
A．小麦区
B．乳畜带
C．玉米带
D．棉花带
相关专题： 鲜切花
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11.填写下列水果和蔬菜的最适贮藏温度:菜花();葡萄()。
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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。水分是鲜切花植物生存的重要条件，在鲜切花栽培中无论什么鲜切花都一样浇水才能长得旺盛。
A、对
B、错
共用题干
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
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
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
情人节（2月14日），美国销售的鲜切玫瑰花多来自哥伦比亚。读下图回答下列问题。小题1:.与美国相比，在情人节期间，哥伦比亚生产鲜切花的优势自然条件是 （）
A．气温较高
B．降水较丰沛
C．地势较平
D．土壤较肥沃小题2:.美国的农业生产实现了地区生产的专业化，形成了一些农业带（区），图中①处是 （）
A．小麦区
B．乳畜带
C．玉米带
D．棉花带
