問題詳情


(B)Counting seems to be easy. However, we are not bom to know it because it is a(n)31. ability. Indeed, human beings —32. thousands of years learning how to count with numbers. In ancient times, shepherds would know 33. his flock of sheep was all there by matching the sheep to the stones. But we all know that this method was far from perfect. 34., abstract numbers were invented in Mesopotamia around 3500 B.C. These numbers make counting 35. faster because they always keep the same value. With them，it was convenient for the Mesopotamians to engage in commercial activities regularly then.
31 ■
(A) gentle
(B) heroic
(C) acquired
(D) inborn

參考答案

答案：C
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)

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