专业英语四级（听写听力）-试卷154
(总分：12.00，做题时间：90分钟)
一、 DICTATION(总题数：6，分数：12.00)
1.PART I DICTATIONDirections: Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be done at normal speed again and during this time you should check your work.（分数：2.00） __________________________________________________________________________________________ 解析： 2.
（分数：2.00）
__________________________________________________________________________________________ 正确答案：(正确答案： Teaching Assistants A teaching assistant usually works about twenty hours each week. / Teaching assistants are paid to help professors teach students in entry-level study programs. / Generally, the professor gives a talk, or lecture, / to a large group of students one or two times a week. / The teaching assistant meets with smaller groups of students during the week. / The T.A. gives tests and reads any homework or reports the students may be required to write. / Teaching assistants also meet with students who seek help. / They attend teaching meetings. / And some working with science professors help to organize laboratory equipment. /) 解析： 3.
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__________________________________________________________________________________________ 正确答案：(正确答案： Trees Trees are the oldest living organisms on earth. / The great age of trees makes them useful for all sorts of scientific research. / Besides, trees also have a lot to teach us about being part of a community / and how cooperation is better for a society than competition. / A community of trees growing together / share all of the available resources with each other. / They do this through their roots, through the soil, / and also through the networks of tiny fungi growing in the soil between them. / They don't only share with trees of the same species. / Any type of tree can benefit. /) 解析： 4.
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__________________________________________________________________________________________ 正确答案：(正确答案： Pedestrian Safety Roads are dangerous places for people on foot. / So, it is important for pedestrians to be aware / that traffic may be approaching from unexpected directions. / Here is some general knowledge to bear in mind. / First, pedestrians are not allowed to walk along or cross any motorway at any time. / Second, it's advisable to use crossings whenever you can / although it's not illegal to cross the road at any point apart from motorways. / Third, you may cross the road when the green man is showing. / But you must not start to cross if the light is flashing. /) 解析： 5.
（分数：2.00）
__________________________________________________________________________________________ 正确答案：(正确答案： Open-source Software Open-source software is computer software / that is available to the general public in source code form. / If a person has enough knowledge about computers and computer programming, / he or she can change the program's source code. / The source code is like a set of directions that show the program how to operate. / People change the codes so that the program will operate / in a way that will meet their needs. / Sometimes changing the code will make the program run faster. / Or it will take problems out of the program. / These problems can cause a computer program to shut down. /) 解析： 6.
（分数：2.00）
__________________________________________________________________________________________ 正确答案：(正确答案： Marathon Races in America Many Americans enjoy running. / And one kind of race, the marathon, has captured the imagination of people all over the nation. / The race has roots in ancient history. / The Boston Marathon in Massachusetts is the oldest marathon which was started in 17. / It was not until 1972 that women could officially compete in Boston. / Today's marathons do not bar anyone because of sex or age. / Racing has expanded to average runners. / Hundreds of these races are organized in America every year, / which are often in connection with a cause / like fighting disease or supporting local hospitals and schools. /) 解析：
