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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.
It takes much more efforts to______.
选项 A、learn Roman numerals than Arab numerals
B、introduce numerals through printed materials
C、make great use of silk roads
D、teach businessmen numerals
答案A
解析 根据第一段最后三句“No other number system ever invented has a simple way…how difficult it would be for a school pupil to remember it!”可知，记忆罗马数字比阿拉伯数字困难得多。故选A。
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