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

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问题    It is hard to imagine life without Arabic numerals (数字). No other number system ever invented has a simple way to write a number like 1984. In Roman numerals, 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 sold and bought goods. The Arabs took the new numbers and made improvements that quickly led to advances in technology.
   The achievement of Arabic technology can be seen from a passage in a 10th-century book 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.
This passage tells us that the Arabs were a people______.
选项 A、inventing Roman numerals
B、having advanced technology long ago
C、growing corn and many other plants then
D、supplying other countries with colorful silk
答案B
解析 根据第二段最后一句“The Arabs took the new numbers and made improvements that quickly led to advances in technology．”可知，阿拉伯人采用了新的数字并对其进行改进，这带来了技术的进步。因此B项正确。阿拉伯人改进而不是发明了罗马数字，故A项错误；文章并未提到阿拉伯人种植玉米，以及为其他国家提供丝绸，故C、D两项错误。
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