全国大学生英语竞赛A、B类阅读理解题库三.docx
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1、全国大学生英语竞赛A、B类阅读理解题库三问答题24.Directions:In this part there are one passage with five questions.Read the passage carefully, then answer the questions in the fewest possible words (not exceeding 10 words).Questions 1 to 5 are based on the following passage:Centuries ago, man discovered that removing mois
2、ture from food helps to preserve it, and that the easiest way to do this is to expose the food to sun and wind.In this way the North American Indians produce pemmican (dried meat ground into powder and made into cakes), the Scandinavians make stockfish and the Arabs dry dates and “apricot leather”.A
3、ll foods contain watercabbage and other leaf vegedivs contain as much as 93% water, potatoes and other root vegedivs 80%, lean meat 75% and fish anything from 80% to 60% depending on how fatty it is.If this water is removed, the activity of the bacteria which cause food to go bad is checked.Fruit is
4、 sun-dried in Asia Minor, Greece, Spain and other Mediterranean coundivies, and also in California, South Africa and Ausdivalia.The methods used vary, but in general, the fruit is spread out on divays in drying yards in the hot sun.In order to prevent darkening, pears, peaches and apricots are expos
5、ed to the fumes of burning sulphur before drying.Plums, for making prunes, and certain varieties of grapes for making raisins and currants, are dipped in an alkaline solution in order to crack the skins of the fruit slightly and remove their wax coating, so increasing the rate of drying.Nowadays mos
6、t foods are dried mechanically.The conventional method of such dehydration is to put food in chambers through which hot air is blown at temperatures of about 110 at endivy to about 43 at exit.This is the usual method for drying such things as vegedivs, minced meat, and fish.Liquids such as milk, cof
7、fee, tea, soups and eggs may be dried by pouring them over a heated horizontal steel cylinder or by spraying them into a chamber through which a current of hot air passes.In the first case, the dried material is scraped off the roller as a thin film which is then broken up into small, though still r
8、elatively coarse flakes.In the second process it falls to the bottom of the chamber as a fine powder.Where recognizable pieces of meat and vegedivs are required, as in soup, the ingredients are dried separately and then mixed.Dried foods take up less room and weigh less than the same food packed in
9、cans or frozen, and they do not need to be stored in special conditions.For these reasons they are invaluable to climbers, explorers and soldiers in battle, who have little storage space.They are also popular with housewives because it takes so little time to cook them.Usually it is just a case of r
10、eplacing the dried-out moisture with boiling water.Questions:1.What makes food go bad according to the passage?2.What does the word “dehydration” in Para.4 refer to?3.Housewives like dried foods because_.4.What kind of diveatment do pears and plums go through in the drying process?5.Where are vegedi
11、vs most commonly dried nowadays? 参考答案:1.The activity of certain bacteria.文章第二段提到:If this water is removed, the activity of the bacteria which cause food to go bad is checked.可知,导致食物变坏的原因是the bacteria“细菌”。2.Drying.文中第四段第一句话提到:现在用机械的方法使事物脱水,后面一句The conventional method of such dehydration这里such dehydra
12、tion就指代前面所说的脱水,故答案是drying。3.they are quick to prepare 文中倒数第一段第二句话给出答案:They are also popular with housewives because it takes so little time to cook them.4.Chemical treatment.文中第二段后半部分详细描写了水果脱水的过程,经过总结可知,在脱水过程中,需要经过一系列化学处理。5.In hot-air chambers.第四段第二句话指出:The conventional method of such dehydration is
13、 to put food in chambers through which hot air is blown at temperatures of about 110,and This is the usual method for drying such things as vegetables, minced meat, and fish.通过概括,可知蔬菜脱水要用高温储藏室。问答题25.Directions: In this part, there are one chart followed by 5 questions.Read the passages carefully, th
14、en answer the questions in a maximum of 10 words.Remember to write the answers on the Answer Sheet.1.What causes gum disease? _2.According to the first paragraph, can you explain what plaque is?It is an almost _ on _.3.What will happen if the plaque on your teeth is not taken away?It will gradually
15、_.4.What can be caused by the toothpaste Corsodyl?It can cause _, _,and _.5.How long do you have to wait when using Corsodyl after drinking coffee, tea, or red wine?_. 参考答案:1.Plaque causes gum disease./ Plaque.文章第一句话就指出Gum disease is caused by plaque.2.invisible layer of bacteria deposit; teeth文章第一部
16、分第一句话中破折号后面的解释即为什么是plaque。3.destroy the tissues holding your teeth文章第一部分第二行中间提到will destroy the tissues holding your teeth in place。4.some staining to your teeth; tooth colored fillings; tongue在Please note那一部分第一段已提到Corsodyl may cause some staining to your teeth, tooth coloured fillings and tongue。5.
17、At least one hour.Please note那一部分第3项已提到for at least one hour。问答题26.Directions:In this section, there is one passage followed by 5 questions.Read the passage carefully, then answer the questions in as few words as possible (not more than 10 words).Remember to write the answers on the Answer Sheet.Que
18、stions 1-5 are based on the following passage.Many people today are worried about bird flu.They are afraid that it will pass from birds to humans and that thousands of people will die in a pandemic.In 1918 a flu virus killed about 50 million people around the world.The virus was called Spanish influ
19、enza (or Spanish flu, for short) because Spanish newspapers first described the disease.Now, after nine years of work, scientists in an American laboratory in Atlanta, Georgia, have produced a copy of the Spanish flu virus.They are also going to publish the genetic sequence of the virus on the Inter
20、net and some experts are afraid that other laboratories could copy the virus.Scientists have copied the virus because they want to understand why the 1918 Spanish flu pandemic killed so many people.In a report in the journal Science, Dr.Jeffery Taubenberger and a team of scientists in the USA show t
21、hat the copied virus is exdivemely powerful.The scientists injected the virus into mice and the mice began to lose weight very quickly.They lost 13% of their weight in two days and all of the mice died within six days.“I didnt expect it to be as lethal as it was,”Dr.Terrence Tumpey, one of the scien
22、tists in the team, told the journal Nature.In another experiment, they injected more mice with a normal type of flu.The mice lost weight at first but then they got better and did not die.The experiments showed that the mice with the Spanish flu virus had 39,000 times more flu virus in their bodies t
23、han the second group of mice.The scientists who copied the virus say their work has already provided important information about the virus and helps to explain why it is so lethal.But other experts are worried that the virus could escape from the laboratory.“Some people will think that they have rea
24、lly created a biological weapon,” said Professor Ronald Atlas of the University of Louisville in Kentucky.“I am even more worried now than I was before about the possibility of a flu pandemic.The 1918 flu pandemic started with bird flu and that might happen again today with Asian bird flu.”Some scie
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