单项选择题

The idea of choosing a new unit equal to 10 of the old units appeared very early in ______.

A．India
B．Egypt
C．Britain
D．America
<上一题 目录 下一题>
热门 试题

单项选择题
In order to store and remember numbers people in earlier times might use all of the following to count with except ______.
A．stones or shells
B．human hands and fingers
C．seeds and beads
D．animals
相关试题