1、专业英语四级（听写听力）-试卷182及答案解析 (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
2、 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）_专业英语四级（听写听力）-试卷182答案解析 (总分：12.00，做题时间：90分钟)一、DICTATION(总题数：6，分数：
3、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
4、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：_正确答案：(正确答案： Volcanoes A volcano is an opening in a planets surface or crust, / which allows lava, ash and gases to escape fro
5、m the place below the surface. / It is dramatic evidence of the powerful forces at work inside the Earth. / Volcanoes are generally found where plates are moving apart or coming together. / Erupting volcanoes can pose many hazards. / And the most deadly volcanoes are usually those tall and conical o
6、nes / built up by many layers of eruptive materials. / They can destroy entire cities and kill large numbers of people. / Nevertheless, volcanoes also add nutritious substances to soils, / creating perfect conditions for many crops. /)解析：_正确答案：(正确答案： Sugary Foods There are two types of sugar / those
7、 found naturally in fruit and milk and those that are added to the diet. / These added sugars can be found in a variety of foods, / including soft drinks, desserts and breakfast cereals. / Added sugars are a great source of energy, / but provide no other nutrients. /Sugary drinks have been identifie
8、d as a possible cause of obesity. / These drinks do not trigger the same sense of fullness as food with similar calories, / increasing the risk of overeating. /)解析：_正确答案：(正确答案： Front A front is a weather system that is the boundary separating two different types of air. / Two major types of fronts a
9、re cold fronts and warm fronts. / Normally cold fronts come with thunderstorms or other types of extreme weather. / They usually move from west to east. / Strong, powerful cold fronts often take over warm air that might be nearly motionless in the atmosphere. / This movement is called a low-pressure
10、 system. / Warm fronts usually show up on the tail end of rain, snow, hail and fog. / As they overtake cold air masses, / warm fronts move slowly, usually from north to south. / Warm fronts are often associated with high-pressure systems. /)解析：_正确答案：(正确答案： DNA Testing DNA testing is a powerful tool
11、for identification and has many practical applications. / Molecule DNA carries our genetic code and determines our characteristics. / 99.9% of the DNA from two people will be identical. / The 0.1% of DNA code sequences that vary individually are called genetic markers. / The key to DNA testing is to
12、 find the genetic markers / that will identify the important similarities or differences between people. / The accuracy of DNA tests has big implications. / They are sometimes the only evidence to prove a suspect was guilty, / or free someone wrongly convicted. /)解析：_正确答案：(正确答案： Artificial Retina Th
13、e first artificial retina has been developed / to help restore vision to people blinded by retina diseases. / It is essentially a sheet of tiny conductors put into the eye by surgeons. / The patient will be fitted with a pair of dark glasses / that have a small attached video camera and portable vid
14、eo processor. / The battery-operated system will send video signals directly to their brain. / However, the electronic retina doesnt restore full vision. / It only allows users to sense light and dark contrasts / and detect movement and important shapes. / And the images they perceive are not in color. /)解析：
