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It is hard to imagine life without Arabic numbers(数字). No other number systerm ever invented has a simple way to write a number

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问题     It is hard to imagine life without Arabic numbers(数字). No other number systerm ever invented has a simple way to write a number like 1984. In Roman numeral, it comes out like this MCMLXXXIV. Imagine how difficult it would be for a school pupil to remember it!
    The Arabs, however, call their numbers "Indian numerals". This is probably because they got the original idea a long time ago from India. There were no printed newspapers or scientific magazines then, so mathematics traveled along the same routes that silk did, as businessmen so and bought goods. The Arabs took the new numbers and made improvements that guickly led to advances in technology.
    The achievements of Arabic technology can be seen from a passage in a 10th-century boo about an Arabic city:"The neighboring country showed the results of careful work in agriculture, trade, and industry, Rice and many other plants were grown in fields with water supplied by Arab engineers. The city included 900 public baths, stone-covered streets, fountains, and beautiful buildings. " At this time, London was a small town with dirty streets, and Berlin was a farming village. In fact, cities outside the Arab world did not reach the same level of social development until centuries later.
According to the passage, the Arab people______.
选项 A、did business with the Indians
B、learned some ideas about business from Indians
C、built public baths in London in the 10th century
D、traveled a long way to learn mathematics in Rome
答案B
解析 阿拉伯人称呼他们的数字式印第安数字。这是因为他们从印第安那里获取一些商业概念。
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