题目

阅读理解 Have you ever wondered how numbers first came about? And why is there 10 of them? Early humans in the Old Stone Age likely counted animals and other objects by carving tally marks(记数符号)on walls, bones or stone. Tally marks were grouped by5, Each tally mark stood for I and each fifth mark was scored through to help keep track This system was fine for small numbers, but it didn't really work with large numbers. As the society developed people came up with different ways of writing down numbers. Many of these systems, though appearing in different counties, were mainly based on tally marks. They created new symbols for each larger number. But even with these systems, it was still cumbersome to write luge numbers. By the 7h century, Indians had perfected the decimal positional(十进位)system, which could describe any number with only ten unique symbols. A key breakthrough of this s5ystem was the number 0. Older systems, which didn't have 0, would leave a blank in its place, making it hard to distinguish between 63 and 603 or 12 and 120. Having and using 0 helped make writing down numbers clearer and easier for everyone to understand. But why were the numbers known as" Arabic" since they were born in India? Here's an interesting story behind it. Sometime in the year 771, Arab businessmen took some Indian scholars(学者) to Baghdad to help teach them the new set of numbers. After leaning the numbers, the Arabs translated the new numbers into their own scrip(文字体系)that is Arabic. Sometime later, the Arab traders carried a book of these numerals to Europe, where the numbers were translated into Latin. As the world got these numbers from Arabia, these came to be known as Arabic numerals. （1） What do we know about the early counting systems? A . They were created in India. B . They all worked with large numbers. C . All the systems followed old symbols. D . Many of them were based on the same system. （2） What does the underlined word "Cumbersome" in Paragraph 3 probably mean? A . Hard. B . Useless. C . Convenient. D . Practical. （3） Which of the following about Indians is TRUE? A . They recreated the decimal positional system. B . They invented the numbers from 009. C . They named a perfect number system. D . They created the number 0. （4） The new set of numbers is called Arable numerals because________. A . the Arabs invented them B . the Arabs spread them C . the Arabs lied to the world D . the Arabs kept them to themselves （5） In which part of a newspaper will you most probably read the passage? A . SOCIETY B . NATURE C . HISTORY D . SCIENCE 答案： D A D B C

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