新GRE小短文阅读练习题四十九
When cut, the synthetic material fiberglass, like asbestos,releases microscopic fibers into the air.It is known that people
who inhale asbestos fibers suffer impairment of lung function.
A study of 300factory workers who regularly cut fiberglass
showed that their lung capacity is, on average, only 90 percent
of that of a comparable group of people who do not cut fiber-
glass.
These statements most strongly support which of the following
hypotheses?
People who work with fiberglass are likely also to work with
asbestos.
Fiberglass fibers impair lung function in people who inhale
them.
Fiberglass releases as many fibers into the air when cut as
does asbestos.
Coarse fibers do not impair lung function in people who
inhale them.
If uncut, fiberglass poses no health risk to people who
work with it.
答案B
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