历年GRE考试真题精选系列七十六

会计考友

Forestry experts are beginning to question the policy of attempting to
2 y" w* g; X. Y9 K5 \extinguish all forest fires instead of allowing them to run their course.
0 k3 v' Q" {7 b5 K. e, S2 W: mObservations about the results of forest fires have indicated that their
6 C8 f3 k; o3 n: T1 K" T+ feffects may be, in the long run, beneficial to the overall ecology of the
forest.
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Which of the following could most logically be one of the "observations"
: _, O. K5 A! k) M& Ereferred to in the passage above?
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More than half of all forest fires are the result of natural causes such as
1 w5 R# d) [+ e# S  a! r　lightning rather than the result of human carelessness.
Most people are killed or seriously injured each year attempting to
　fight forest fires than would be killed or injured if the fires were
6 ?. N8 R/ d% f2 }+ T& O/ N* z　allowed to burn themselves out.
Frequent small forest fires prevent the accumulation of highly flammable
4 k9 [+ M/ `& ^; ]1 E' [　dead brushwood and timber, which can support massive, uncontrollable fires.
, l7 r( b- m" A) I! Q+ f The animal and plant life destroyed by forest fires seldom represents
3 r% C3 v- u2 j) {5 t  t' R: a! a" j　endangered species.
Study of tree tissues indicates that forest fires were a regular occurrence
　in the times preceding human occupation of forest areas.
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! j. z* {- E$ C' U5 M- Y- C答案：(C)