题目内容
常用的数据传输速率单位有Kbps、Mbps、Gbps。1Gbps等于______。
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【B15】
A．50 percent.B．2 percent.C．4 percent.D．6 percent.
听力原文： I am going to work in a totally new environment. I'll have to get used to different working conditions. I am used to working in quite high-tech sort of industry that has got lots of machinery and everything. But now I am going to a place that has no machinery as such, apart from a typewriter. The place has no electricity at all, no photocopiers, all the things that you just take for granted here. They just won't be there any more. I’l1 be staying near the school in quite a small village. And I will be staying in a teacher's house, living with two or three other volunteer teachers. I'll have to get used to not having the variety of different foods that you have here like twenty different varieties of breakfast serial. And the range of food there is much smaller, not choices, I’ll also have to get used to getting water from a well, not having electricity which means gas lamps in the evening; which means the difficulty of preparing for the next day's lessons in poor light; which means different ways of getting your clothes washed. There will be all sorts of big differences like that but I'll have to get used to when I arrive there.
(33)
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Would the world really be so much better off if there were no dust？ The answer is in some ways, yes, in some ways, no. What is dust anyway？ It consists of particles of earth, or other solid matter, which are light enough to .be raised and carried by the wind. Where do these particles come from？ They might come from dead plants and animal matter, from sea salt, from desert or volcano sand and from ashes. For the most part, dust is not a very desirable or beneficial thing. But in one way, it helps make the world more beautiful. The lovely colors of the dawn depend to a great extent on the amount of dust that is present in the air. Particles of dust in the upper air reflect the sun's rays. This makes its light visible on earth an hour or two after sunset. But different colors which make up the sun light are bent .at different angles as they are reflected by the dust and water steam particles. Sunsets are red, because these particles bent the red rays of the sun in such a way that they are the last rays to disappear from view. Another useful function of dust has to do with ram. The vapor water in the air would not become a liquid very readily, if it did not have the dust particles serving as centers for each drop of water. Therefore, clouds, mist, fog and rain are largely formed of an infinite number of moisture particles of dust.
(27)
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