[語文] GWD D3-Q38
Kate: The recent decline in numbers of the Tennessee warbler,
a North American songbird that migrates each fall to coffee plantations
in South America, is due to the elimination of the dense tree cover that
formerly was a feature of most South American coffee plantations.
Scott: The population of the spruce budworm, the warbler's favorite prey
in North America, has been dropping. This is a more likely explanation of
the warbler's decline.
Which of the following, if true,
most seriously calls Scott's hypothesis into question?
A. The numbers of the Baltimore oriole, a songbird that dose not
eat budworms but is as dependent on South American coffee plantations
as is the Tennessee warbler, are declining.
B. The spruce-budworm population has dropped because of a disease
that can infect budworms but not Tennessee warblers.
C. The drop in the population of the spruce budworm is
expected to be only temporary.
D. Many Tennessee warbler have begun migrating in the fall to places
other than traditional coffee plantations.
E. Although many North American songbirds have declined in numbers,
no other species has experienced as great a decline as has the Tennessee
warbler.
answer A
請問 答案為什麼會是A 已經想破頭了
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