新GRE小短文阅读练习题四十九

会计考友

When cut, the synthetic material fiberglass, like asbestos,
8 m4 y6 w: T0 Zreleases microscopic fibers into the air.  It is known that people
who inhale asbestos fibers suffer impairment of lung function.  
5 ^# z/ K0 i4 qA study of    300  factory workers who regularly cut fiberglass
- P" b& `. D1 a3 xshowed that their lung capacity is, on average, only     90 percent
, ?/ r! [' E# q' ^. @) rof that of a comparable group of people who do not cut fiber-
glass.
These statements most strongly support which of the following
6 m' Y  p, `6 x hypotheses?
      People who work with fiberglass are likely also to work with
) O" p6 m" Q) J- p' p        asbestos.  
% x$ V. J- d+ ?8 _! [1 n! \      Fiberglass fibers impair lung function in people who inhale
  V# S! [! ]$ q8 J6 y0 R        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