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  3. In general, the ancient Romans were a practical people. They cared less about philosophy anti pure mathematics than did the Gree

In general, the ancient Romans were a practical people. They cared less about philosophy anti pure mathematics than did the Gree

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问题     In general, the ancient Romans were a practical people. They cared less about philosophy anti pure mathematics than did the Greeks. The Romans were the best of the ancient engineers anti architects. They were brilliant students of Greek geometry and trigonometry, and they applied their knowledge to the constructions of fine bridges, roads, aqueducts, and public buildings.
    They knew about the smelting of iron ore, but they used the iron they produced mainly for spears, swords, and shields, rather than for building construction.
   While the Romans accomplished practical wonders, they did very little theoretical scientific thinking. Because of their frequent wars, many of their inventions were no more than improvements in the design of Greek weapons with which they were familiar.
    There are two reasons for the Romans neglect of philosophy and pure mathematics. First, they were apparently too busy conquering nearby nations and forming them into a rapidly growing empire to waste much time on abstract thinking. Secondly, they were handicapped by the rigidity of their numerical system. The Romans did all of their arithmetic on an abacus, the ancient counterpart of the modem computing machine. Their number system discouraged the study of pure mathematics.
It can be inferred form the passage that______.
选项 A、the Romans were bored by their numberical system
B、the Romans invented abaci
C、the Romans were very rigid
D、the Romans didn’t want to learn Greek mathematics
答案A
解析 参阅第四段第三句。这句的意思是罗马数字的刻板妨碍了他们(进行纯理论的研究)，A与此意相似。B选项在文中明确说明，不能选为答案，C、D选项的意思不能从文中推断出。
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