填空题

Any frequency close to 30Hz will interfere with cues that keep our biological cycles properly timed because the frequecies are close to the ______ of man.

【参考答案】

natural brain rhythms

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填空题

The harm the electromagnetic radiation does to people’s health is as great as or even greater than that cigarette smoking does.

问答题

Dear Peter,You have asked me for my advice concerning whether you should study history or computer science at a university. Here is how I look at it.I know you have been interested in history since schooldays. However, as a practical person and your friend, I would advise you to take up computer science. There are several reasons for this. Firstly, university training is a preparation for your future career. Therefore, when you choose your major, you have to think about its prospect—whether it will ensure your establishment and continuous development in society. Computer science will offer you much wider job opportunities. History, however fascinating it may be, offers far fewer career prospects. Secondly, in the age of science and technology, it is necessary for one to be computer-literate. In fact, the computer is playing an increasingly important role in our lives. If you choose computer science as your major, I am sure you can enjoy far better career prospects than you can with history.Of course, I am not suggesting that you give up your interest in history altogether. You can take it as a hobby, which may enrich your life. In this way, while you study computer science for your future career, you can also find pleasure in your hobby.I hope what I said can be of some help for you to decide. I wish you could make a wise and happy choice.Best wishes,Rebecca

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