1、专业英语四级听力-31及答案解析 (总分：100.00，做题时间：90分钟)一、BPART DICTATIO(总题数：1，分数：25.00)1.（分数：25.00）_二、BPART DICTATIO(总题数：1，分数：25.00)2.（分数：25.00）_三、BPART DICTATIO(总题数：1，分数：25.00)3.（分数：25.00）_四、BPART DICTATIO(总题数：1，分数：25.00)4.（分数：25.00）_专业英语四级听力-31答案解析 (总分：100.00，做题时间：90分钟)一、BPART DICTATIO(总题数：1，分数：25.00)1.（分数：25.00）_
2、正确答案：()解析：听力原文Bread-makingPeople make bread in different ways, / but the bread thats made in Britain contains five ingredients. / Theres water, flour of course, / and then theres salt, sugar and something called yeast. / A long time ago, people made bread just from flour and water, / and their bread
3、 looked and tasted very different from the bread we make today. / It was a different shapelike large flat biscuits, / and it was dark brown in colour. / But it was too heavy to digest. / Then the Egyptians discovered that yeast, / which is a kind of fungus, will make bread rise. / Well, in fact, if
4、you look at a modern loaf of bread through a microscope, / it looks a bit like a sponge, doesnt it? / Full of little holes. / Well, the holes make the bread lighter, of course, and easier to digest. /二、BPART DICTATIO(总题数：1，分数：25.00)2.（分数：25.00）_正确答案：()解析：听力原文Changing Rate of EmploymentWest Germany h
5、ad one of the lowest rates of unemployment back in 1980. / It stood at just three percent. / But then over the next three years it rose quite sharply and steadily. / In 1982 it was nearly six percent, / and in 1983 it was the same as France. / 1984 saw a slight increase, and 1985 a slight fall. / Th
6、e 1985 figure was eight percent, / in between France and the United States. / The United States has had ups and downs, / or rather, its the only country to show a significant drop in the number of unemployed. / This is due to high interest rates, / which havent helped the rest of the world. / In 198
7、0 the rate was about the same as France and Great Britain, / slightly higher than France, actually, at about seven percent. / This rose to 7.5 percent in 1981, and then peaked the following year at over nine percent. /三、BPART DICTATIO(总题数：1，分数：25.00)3.（分数：25.00）_正确答案：()解析：听力原文Natural and Synthetic R
8、ubberPeople get natural rubber from rubber trees / as a white, milky liquid, which is called latex. / They mix it with acid, and dry it, / and then they send it to countries all over the world. / They started rubber plantations in countries / with hot, wet weather conditions, / but these still could
9、 not give enough raw rubber / to meet the needs of growing industry. / It was always possible that wars or shipping trouble could stop supplies. / In the end, they found a way of making artificial, man-made rubber / which is in many ways better than / and in some ways not as good as natural rubber.
10、/ It is usually cheaper than natural rubber. / Today, the world needs so much rubber that / we use both natural and artificial rubber in large amounts. /四、BPART DICTATIO(总题数：1，分数：25.00)4.（分数：25.00）_正确答案：()解析：听力原文Travel BooksThere are three kinds of travel books. / The first are those that give a per
11、sonal, subjective account of travels / which the author has actually made himself. / If these books are informative / and have a good index, / they can be very useful to you / when you are planning your travels. / The second can be classified as selective guidebooks / whose purpose is to give a pure
12、ly objective description of things to be done and seen. / The third are those books which are called a guide to some place or other. / They will give an analysis or an interpretation. / They can be as inspiring and entertaining as the first kind, / but their primary function is to assist the reader / who wishes to plan his tour / in the most practical way. /
