Theabacuswasinvented________by

发布时间:2020-07-28 00:34:27

The abacus was invented ________ by Chinese people.A.in the sixth CenturyB.in the sixtieth CenturyC.in the sixteenth CenturyD.in the six Century

网友回答

A解析根据常识算盘是6世纪发明的,表达时用序数词。
以上问题属网友观点,不代表本站立场,仅供参考!