题目内容
The word "prudent" in paragraph I is closest in meaning to
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工业企业在销售产品、提供劳务等经营业务中所产生的收人称之为（）。
商务应酬是一个合作的过程，每人都在____说服对方，从而为自己争取最大化的利益。在这场利益的争夺战中，谁能“出奇”，运用____ 的应酬方法，谁就能“制胜”，成为笑到最后的王者。
填人划横线部分最恰当的一项是：
第三篇 Some Things We Know about Language
Many things about language are a mystery, and many will always remain so. But some things we do know.
First,we know that all human beings have a language of some sort. There is no race of men anywhere on earth so backward that it has no language, no set of speech sounds by which the people communicate with one mother. Furthermore,in historical times, there has never been a race of men without a langUage． Second , there is no such thing as a primitive language. There are many people whose cultures are undevel oped,who are,as we say,uncivilized, but the languages they speak are not primitive. In all known languages we can see complexities that must have been tens of thousands of years in developing.
This has not always been well understood;indeed, the direct contrary has often been stated. Popu- lar ideas of the language of the American Indians will illustrate. Many people have supposed that the Indians communicated in a very primitive system of noises. Study has proved this to be nonsense. There are,or were,hundreds of American Indian languages,and all of them turn out to be very complicated and very old. They are certainly different from the languages that most of us are familiar with,but they are no more primitive five than English and Greek.
A third thing we know about language is that all languages are perfectly adequate. That is, each one is a perfect means of expressing the culture of the people who speak the language.
Finally, we know that language changes. It is natural and normal for language to change;the only languages which do not change are the dead ones. This is easy to understand if we look backward in time. Change goes on in all aspects of language. Grammatical features change as do speech sounds,and changes in vocabulary are sometimes very extensive and may occur very rapidly. Vocabulary is the least stable part of any language.
In the second paragraph the author thinks that
？？The same detection system mentioned in the previous paragraph？？
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