Forestry experts are beginning to question the policy of attempting to
: i; y3 d! ?7 n# i8 @extinguish all forest fires instead of allowing them to run their course. 8 H. O7 g+ M/ t- t
Observations about the results of forest fires have indicated that their c- g. L% X5 I p4 ]0 p) L
effects may be, in the long run, beneficial to the overall ecology of the # X9 }: O$ Z h O9 \
forest. & |0 y1 p& G" U5 l% S
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Which of the following could most logically be one of the "observations"
3 O( F5 Y9 V5 `+ ureferred to in the passage above?
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More than half of all forest fires are the result of natural causes such as m! c( M/ ]+ G8 o, y/ A
lightning rather than the result of human carelessness.
; k T! v8 C6 p$ n Most people are killed or seriously injured each year attempting to 3 m! q3 @1 V+ `5 \
fight forest fires than would be killed or injured if the fires were
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, @( ~2 W5 y" n5 q% @ Frequent small forest fires prevent the accumulation of highly flammable 4 r& A. q; n* z% T) E8 B8 W& I. k
dead brushwood and timber, which can support massive, uncontrollable fires. , V* J0 E. W) M: c
The animal and plant life destroyed by forest fires seldom represents
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Study of tree tissues indicates that forest fires were a regular occurrence ; A# K( d @# H
in the times preceding human occupation of forest areas.
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答案:(C) |