2011年英语四级考试阅读主旨题解题技巧
Farmer ED Rawlings smiles as he looks at his orange trees. The young oranges are growing well in Floridas weather. Warm sunshine and gentle rains, along with ED Rawlings expert care, will produce a good crop of oranges this year.
But ED has to fight against Floridas changeable winter weather. In January and February, temperature can destroy EDs entire orange crops. Having farmed in Florida for the past 35 years, Ed Rawlings is prepared for the frosts. When temperatures drop below freezing, Ed tries to save his crop by watering his orange trees. The water freezes and forms a thin layer of ice on the trees. Strange as it may sound, this thin layer of ice actually keep the fruit warm..
What happens is simple. When the trees are watered, the water loses heat and becomes ice. The warmth of the heat it loses is sicked in by the fruit and keeps its temperature at a safe level. Ed Rawling has effectively used this method to save many orange crops.
But Ed still faces some difficulties. The trees should be watered at the exact moment the temperature drops to the freezing point. Also, just the right quantity of water must be used. Too much water can form a thick layer of ice that will break the trees branches. Another difficulty is that wind blows away the heat. So Ed has to worry about not only when but also how often his trees should be watered, and how much water should be used.
Computer technology may help Ed with some of these worries. With equipment, air and soil temperatures and wind speed can be measured. The information is fed into a computer which can tell when temperatures drop to freezing. The computer can correctly decide the quantity of water to be used and how frequently the trees should be watered. Ed will find looking after his orange trees a lot easier with the help of a computer, and well all have the benefits of computerage oranges.
The passage is mainly about_______.
A a farmers expert care for his orange trees
B the different uses of computers
C growing oranges in Floridas changeable weather
D different way of frost protection
Key:a
雅思口语素材:好句推荐-沉思的瞬间
雅思口语范文:如何保持健康
雅思口语素材:好句推荐-人生的起落
雅思口语考试应做和不应做的事
雅思口语天天练:实用口语表达
雅思口语范文:结婚人选的特点
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雅思口语素材:经典译文-道德经(第三章)
雅思口语素材:好句推荐-奋斗不止
雅思口语素材:好句推荐-悲观者与乐观者
雅思口语范文:一个有水的地方
雅思口语天天练:生活常用精彩表达
雅思口语素材:好句推荐-成熟的标志
雅思口语范文:A Handicraft
雅思口语素材:Notting Hill Carnival(诺丁山儿童节)
雅思口语考试必须注意的六个“不要”
雅思口语素材:好句推荐-疯狂的旅程
雅思口语答题需要注意的细节
雅思口语素材:George Washingtons Birthday(华盛顿的生日)
雅思口语素材:好句推荐-走进光明
雅思口语范文:理想的结婚人选
雅思口语素材:好句推荐-最神奇的事
雅思口语范文:家庭事务
雅思口语天天练:购物必会的实用句子
雅思口语考官直接问第三阶段的问题怎么办?
雅思口语天天练:生病时常用的表达
雅思口语素材:经典译文-道德经(第一章)
雅思口语素材:Coming-of-Age Day(日本成人节)
换个角度来看雅思口语考试
雅思口语范文:Describe a Family
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