单项选择题

Which of the following does NOT pertain to the "support services" mentioned in the passage

A．Telecommunications systems.
B．Universities for training business administrators.
C．Sources of industrial tools.
D．Reservoir of labor force.
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单项选择题
The increase in the numbers of married women employed outside the home in the 20th century was NOT due to______.
A．their economic necessity
B．more women employers
C．shortage of single women workers
D．high marriage rates
单项选择题
It can be inferred from the passage that, before the Industrial Revolution, most women worked in______.
A．textile mills
B．private households
C．Offices
D．schools
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