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Questions 11 to 13 are based on the following talk on the world’s changing climate. You now have 15 seconds to read Questions 11 to 13.
Let me begin this commentary on the world’s changing climate by saying that climatology, the study of long-range trends in weather, is at best an inexact science. It is based on hypotheses. Currently, a major argument among climatologists concerns the long-range weather outlook for the earth. The question that occupies them so much is this: Is the earth cooling off, or is it in fact heating up Is the earth going through a cooling trend or a warming trend A cooling trend could bring mass starvation and fuel shortage. But on the other hand, a warming trend could melt the polar ice caps and cause flooding of the coastal cities of the world. In either case, the consequences for man might be alarming, and possibly disastrous. Let me just point out that rains and floods of record proportions have recently struck some geographic area
A. Floods along the sea coasts.
B. A shortage of food and fuel.
C. Unpredictable weather conditions.
D. Disappointment to some climatologists.

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Questions are based on the following talk about computer science education in Switzerland.
Here in Switzerland you get a bachelor’s degree in two years and three years later a master’s. Usually, people stop at a master’s, but if you want to go on for a Ph.D., that takes another four years. Most people stay in one subject, so you need to decide the direction you want to take after high school.
There are required core courses for bachelor’s and master’s programs. My university is a technical university, so the core courses are the same for everybody — computer science, mathematics, physics, mechanics and so on.
For students specializing in computer science, there is another set of required courses that we call basic computer science. Completing these takes two years. At that point, you can choose a specialty in one of the four areas — system software, information technology, hardware or theoretical computer science.<
A. All the students.
B. Students doing a Bachelor.
C. Students doing a Master.
D. Students doing a Ph.D.

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Questions are based on the following talk about how to love and to be loved. You now have 15 seconds to read Questions .

People who are willful call themselves "independent" because（）

A. their knowledge of words is very poor
B. they fail to make distinction between words; it is just a manner of speaking
C. they are too strict with their words
D. they use words loosely and make mistake in defining and distinguishing

[单项选择]Questions 16 to 20 are based on the following talk.A. A mistaken picture in students’ mind.
B. The unscientific way of teaching of science.
C. The fact that students fail to see the influence of science.
D. The fact that students have a collection of unrelated facts about science.

[单项选择]Questions 11 to 18 are based on the following talk.A. By computer. B. By radio.
C. By doctors. D. By the phone caller.

[单项选择]

Questions 14 to 16 are based on the following talk. You now have 15 seconds to read Questions 14 to 16.
It’s always fun to write about research that you can actually try out for yourself.
Try this: Take a photo and upload it to Facebook, then after a day or so, note what the URL link to the picture is and then delete it. Come back a month later and see if the link works. Chances are: It will.
Facebook isn’t alone here. Researchers at Cambridge University have found that nearly half of the social networking sites don’t immediately delete pictures when a user requests they be removed. In general, photo-centric websites like Flickr were found to be better at quickly removing deleted photos upon request.
Why do "deleted" photos stick around so long The problem relates to the way data is stored on large websites: While your personal computer only keeps one copy of a file, large-scale services like Facebook rely on what are ca
A. When the system is down.
B. When new links are set up.
C. When the URL is reused.
D. When the server is restarted.