单项选择题

The primary purpose of the passage is to ______.

A．contrast possible outcomes of a type of business investment.
B．suggest more careful evaluation of a type of business investment.
C．illustrate various ways in which a type of business investment could fail to enhance revenues.
D．trace the general problems of a company to a certain type of business investment.
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单项选择题
It can be inferred that the author of the passage discusses unmonitored workers'(line 6) primarily in order to ______.
A．compare the ratings of these workers with the ratings of monitored workers
B．provide an example of a case in which monitoring might be effective
C．provide evidence of an inappropriate use of CPMCS
D．emphasize the effect that CPMCS may have on workers' perceptions of their jobs
单项选择题
According to the passage, a hygiene factor (line 13) is an aspect of a worker's performance that ______.
A．has no effect on the rating of a worker's performance
B．is so basic to performance that it is assumed to be adequate for all workers
C．is given less importance than it deserves in rating a worker's performance
D．if not likely to affect a worker's rating unless it is judged to be inadequate
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