单项选择题

Once a person, infected, he should______.

A．be isolated immediately
B．be observed in hospital
C．be given vaccinatio at once
D．be examinated professionally
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单项选择题
If a boss wants to get more profits, he can do the following things EXCEPT ______.
A．asking for industrial psychologists' help
B．studying the effects of fatigue on workers to determine the length of working time
C．establishing a more direct communication between employees and management
D．changing the routine motions of the work itself, changing or moving the tools, improving the working conditions
单项选择题
One aim of psychological research is to ______.
A．study worker candidates' intelligence and characteristics
B．discover the special intelligence and personality characteristics of worker candidates'
C．solve the specific problem
D．help choose the right or suitable workers for particular jobs
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