[語文] 新pp3 -cr1-82
82.(28316-!-item-!-188;#058&002977)
When feeding, aquatic birds known as phalaropes often spin rapidly on the
water's surface, pecking for food during each revolution. To execute these
spins, phalaropes kick one leg harder than the other. This action creates
upwelling currents. Because plankton on which phalaropes feed typically
occurs in greater quantities well below the surface, it is hypothesized that
by spinning phalaropes gain access to food that would otherwise be beyond
their reach.
Which of the following, if true, most strongly supports the hypothesis?
A. Phalaropes rarely feed while on land.
B. A given phalarope spins exclusively either to the right or to the left.
C. Phalaropes sometimes spin when they are not feeding.
D. Different phalaropes spin at somewhat different rates.
E. Phalaropes do not usually spin when food is abundant at the surface.
答案是E
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10/26 18:51, , 1F
10/26 18:51, 1F
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10/26 19:12, , 2F
10/26 19:12, 2F
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不過我懂了 謝謝!!
※ 編輯: twalice 來自: 123.192.65.133 (10/26 19:45)
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