单项选择题

In supporting his argument about the ancient world, the author mainly discusses the______.

A．examples of the separation of mechanics and geometry.
B．cases about the studies of lack of communication between classes.
C．obstacle to the progress of technology.
D．his concern about the plight of the labouring classes.
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单项选择题
In the specific recession years noted in the passage, it can be inferred that______.
A．the rate of unemployment grew
B．the rate of employment rose
C．labor force growth exceeded final expenditure for goods
D．full employment was attained
单项选择题
The author's purpose in this passage is to______.
A．define the economic terms used in discussion of employment
B．criticize the decisions of past administrations during recession years
C．call for the application of positive economic control policies in the year that lie ahead
D．allay current fears about increasing unemployment
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