题目内容
20.Farmer Ed Rawlings smiles as he looks at his orange trees.The young oranges are growing well in Florida's weather.Warm sunshine and gentle rains,along with Ed Rawlings'expert care,will produce a good crop(收成)of oranges this year.However,Ed has to guard against Florida's changeable winter weather.In January and February,temperatures can destroy Ed's entire orange crop.Having farmed in Florida for the past 35years,Ed is prepared for the frost(霜).When temperatures drop below freezing,Ed tries to save his crop by watering his orange trees.The water freezes and forms a thin layer(层) of ice around the trees.Strange as it may sound,this thin layer of ice actually keeps 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 taken in by the fruit and keeps its temperature at a safe level.Ed has effectively used this method to save many orange crops.
But Ed still faces difficulties.The trees must be watered at the exact moment the temperature drops to the freezing point.Also,just the right quantity(数量)of water must be used.Too much water can form a thicker layer of ice that will break the tree's branches(树枝).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(设备),air and soil temperatures and wind speed can be measured.The information is fed into a computer which can calculate(计算) when the temperature will drop below freezing.The computer can correctly decide the quantity of water to be used and how frequently the trees should be watered.Ed finds looking after his orange trees a lot easier with the help of a computer,and,his customers will have the benefits(利益) of computer-age oranges.
58.The passage is mainly aboutA.
A.a farmer expert cares for his orange trees
B.the different uses of computers
C.growing oranges in Florida's changeable weather
D.different ways of frost protection
59.Ed tries to protect his crop byC
A.using a wind machine to drive away the cold air
B.equipping his orange trees with a computer
C.watering it at the proper time
D.picking his fruit at the first sign of frost
60.According to the passage,the computer technologyD.
A.removes the need for frost protection
B.prevents temperature from dropping
C.tells farmers why outdoor temperatures change
D.helps the farmer get a better harvest.
分析 文章大意:本文讲述橘农Ed Rawlings呵护橘子树,并想借助计算机更科学地管理树木以取得更好的收成.
解答 58-60:ACD
58题答案:A 主旨题. 这篇第一句Farmer Ed Rawlings smiles as he looks at his orange trees,短文主要谈的是一个老农对于橘子树的看护(a farmer's care for his orange trees).虽然C项growing oranges in Florida's changeable weather本文也有讨论,但整篇突出的是Ed这个人的看护果树活动.
59题答案:C 细节题.根据文中第二段Ed tries to save his crop by watering his orange trees可知 Ed是通过浇水的方法来保护他的橘子树的(by watering them at the proper time).
60题答案:D 细节题. 根据文中的最后一段The computer can correctly decide the quantity of water to be used and how frequently the trees should be watered.Ed finds looking after his orange trees a lot easier with the help of a computer,and,his customers will have the benefits(利益) of computer-age oranges.埃德发现在电脑的帮助下照看他的橘子树容易得多,而且他的顾客也会受益于电脑时代的橘子 计算机技术的应用能帮助农民获得更好的收成.故选择D.
点评 本文是一篇日常生活类阅读,题目涉及多道细节理解题,做题时结合原文和题目有针对 性找出相关语句进行仔细分析,结合选项选出正确答案.推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案.