2021年1月

亚慱app_双语科技百科(数学) 第29期:十进制的使用

The Use of the Decimal System十进制的用于According to the oracle inscription shown on tortoiseshells or animal bones,Chinese people in the Shang Dynasty was already able to use 13 words-one,two,three,four, flue,six, seven,eight, nine,ten,hundred,thousand,and ten thousand-to denote any number within 100,000.However,the largest number that can be found is 30,000. The notions of odd,even,and multiple also appeared on the oracle inscriptions.据甲骨卜辞记述,商代的人们早已学会用一、二、三、四、五、六、七、八、九、十、百、千、万这13个单字记十万以内的任何数字,但是现在需要证实的当时仅次于的数字是三万。

亚慱app-海南规模养猪效益大减

记者6日从海南省价格成本调查队获悉,该调查队对海口、三亚、文昌、琼海、琼中和乐东等6个市县23名规模养猪专家进行调查结果显示,去年下半年海南省规模养猪生产效益大幅减半,猪产值和效益大幅上升。