1、专业英语四级听力-30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-30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MusselsMussels are found worldwide. / Some live in the sea. / Others inhabit freshwater streams and lakes. / When you try to move a mussel from a rock, / you will discover what an incredibly firm grip it has / a necessity if the mussel is to resist the sharp grab of a hungry seabird or
3、 the pounding waves of the sea. /How does it manage to cling so tight? / When it chooses a place to set up home, / it pokes its tongue-shaped foot out of its shell / and presses it against a solid surface. / Special glands give off a fluid mixture of proteins / into a channel that runs the length of
4、 the foot. / This liquid quickly hardens into a fine, / elastic thread about an inch long. / Then a tiny pad-like structure at the end of this thread give off some natural glue-like substance, / the mussel lifts its foot, and anchor line number one is complete. / These strategically placed threads f
5、orm a bundle, / which ties the mussel to its new home in much the same way / that ropes hold down a tent. / The whole procedure takes only three or four minutes. /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The Process of Gaining or Losing WeightThe process of gaining or losing weight
6、 can be explained / by comparing your body to your car. / Both run on fuel, food for your body and gasoline for your car. / Both of the fuels must first be converted into heat, then energy, / some of which is used to do work, / and some emitted as waste, and just as your car uses more energy / when
7、the engine is racing than when it is idling, / so does your body use more energy when you are working harder than when you are resting. /However, there is one significant difference between them. / Your car cannot store fuel / by turning it into something else; all gasoline not consumed remains as g
8、asoline. / But your body stores excess energy as fat. / When the gas tank is completely empty, / the car wont run; / but your body can burn fat to provide more energy. / Therefore, if you want to gain weight, / you must do either of two things: / eat more calories, / or use less through inactivity.
9、/ If you want to lose weight, / you do the reverse: decrease your intake of calories or increase the amount of energy you spend. / There is no other way, gaining or losing weight is always a relation / between intake and output of potential energy. /三、BPART DICTATIO(总题数：1，分数：25.00)3.（分数：25.00）_正确答案：
10、)解析：听力原文Cars in the FutureAs big cars cause many problems, / such as pollution, shortage of parking space, crowded traffic, / scientists are now trying to design some small cars that may some day replace todays big automobiles. / If more people begin to drive such cars in the future, / there will b
11、e less air pollution. / There will also be more space for parking cars in cities, / and the streets will be less crowded. / Three such cars can fit in the space / that is now needed for one car of the usual size. / The little cars will cost much less to own and to drive. / Driving will be safer as t
12、hese cars can only go 60 kilometers per hour. /The cars of the future will be fine for driving around the city. / However, they will not be suitable for long trips, / because these cars by petrol can only go 450 kilometers / before needing to stop for refueling. /四、BPART DICTATIO(总题数：1，分数：25.00)4.（分
13、数：25.00）_正确答案：()解析：听力原文Christmas CandlesFrankly speaking, Christmas candles are no different / from any other decorative candle / that you might find in the shops all through the year. / But the very fact that they are lit up during Christmastime gives them the look of a festival. / Christmas candle
14、s are big in size and designed in several shapes. / You will find the common round shaper /Christmas candles tend to play up on the thickness so that they can burn longer, / all through the Christmas Eve if desired. /Traditional colors of Christmas candles are preferably red or golden, the colors of
15、 the season. / But you will find all colors on the shelves nowadays. / However, if other colors are used, / they are often decorated with obvious Christmas designs / to make them part of the season. / Red and golden candies are usually kept as they are, / because the colors themselves lend grace to the season. /
