单项选择题

This process of elaborating a concept and moving toward empirical indicators is the crucial step in ______ analysis.

A．dubious
B．variable
C．eccentric
D．fluctuating
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单项选择题
It is important that employees stick to their company's security policies because ______.
A．they are the ultimate users of the network
B．everyone will have to follow the rules anyway
C．they often make errors in operating their systems
D．security breaches are often caused by their blunders
单项选择题
The word underscore in the last sentence of the text probably means ______ .
A．underestimate
B．ignore
C．emphasize
D．accelerate
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