四、翻译

51.The best evidence for the layered mantle(地幔)thesis is the well-established fact that volcanic rocks found on oceanic islands, islands believed to result from mantle plumes(地柱)arising from the lower mantle, are composed of material fundamentally different from that of the midocean ridge system, whose source, most geologists contend, is the upper mantle.

答案：分层地幔的证据就是在海岛上发现的火山岩这一明显的事实。岛屿被认为是从低层地幔升起的地柱形成的，它构成的基本成份与海中的山脊系统根本不同，许多地质学家认为它起源于上层地幔。

五、写作

52.Directions: For this part, you are allowed 30 minutes to write a composition on the topic "An ln-creasing Nunber of People are Studying for Master Degrees". You should write in no less than 100 words, and base your composition on the outline given in Chinese below:

1.越来越多的人在读硕士学位;

2.其中的原因;

3.你个人的看法。

答案：Need A Master Degree or Not

Nowadays, most people want to enter graduate school. In fact, this desire has grown considerably in the past few years. Students struggle to pass the graduate school entrance exam, to survive the pro-gram, and find a job at the end of it. They read many exam preparation books. They may also attend special "exam preparation" seminars and courses. There are some reasons for such phenomenon.

First is the general perception that a graduate school diploma, a master' s degree, is needed for getting a better job. Second is that some students might not be sure what they want to do, and a few more years inside the courtyards of academic seems desirable.

In my opinion, this is not reasonable. I don't deny that a few passed and went on, but the majority failed and finally wiped away their valuable times. So we don' t have to study for the mas-ter degree. Never forget the old saying: every road leads to Rome!

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