【单选题】There are two kinds of division of labor: that based on age and that based on sex. Division of labor by age results in the obvious biological fact that human beings【C1】______ three major periods of de...
【简答题】阅读理解 Adam Smith, writing in the 1770s, was the first person to see the importance of the division of labour and to explain part of its advantages. He gives us an example the process by which pins were...