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  3. We do not know when man first began to use salt, but do know that it has been used in many different ways throughout history. Hi

We do not know when man first began to use salt, but do know that it has been used in many different ways throughout history. Hi

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问题     We do not know when man first began to use salt, but do know that it has been used in many different ways throughout history. Historical evidence shows, for example, that people who lived over three thousand years ago ate salted fish. Thousands of years ago in Egypt, salt was used to preserve the dead.
    In the Roman Empire, one of the most important roads was the one that carried salt from the salt mines to Rome. Guards were stationed along the route to protect against salt thieves. The guards received their pay in salt, hence the English word salary. Any guard who fell asleep while on duty was said to be not worth his salt, is still used today in English to refer to a person felt to be incapable of doing a job.
    In the modem world salt has many uses beyond the dining table. It is used in making glass and airplane parts, in the growing of crops, and in killing weed. It is also used to make water soft, to melt ice on roads and highways, to make soap, and to fix colors in cloth.
    Salt can be obtained in various ways besides being taken from mines underground. Evaporation of salt water from the ocean or salt water lake or small seas is one of the more common processes for manufacturing salt. In Australia it can even be taken from "salt bush". Yet, however it is obtained, salt will continue to play an important role in the lives of men and women everywhere.
Salt has been used in many different ways throughout history. We know this______.
选项 A、from people of the time
B、from various historical evidences
C、from some Egyptians
D、from some Romans
答案B
解析 第一段第一句话：我们不知道人类从什么时候开始使用盐，但是的确知道在历史上盐的各种用途。然后举例说明盐在历史资料中显示的两种用途。因此可以得出B项是正确答案。
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