T-3-40

rainbowmanutd

Boreal owls range over a much larger area than do other owls of similar size. The reason for this behavior is that the small mammals on which owls feed are especially scarce in the forests where boreal owls live, and the relative scarcity of prey requires the owls to range more extensively to find sufficient food.

Which of the following ,if true, most helps to confirm the explanation above?

A.    Some boreal owls range over an area eight times larger than the area over which any other owl of similar size ranges
B.    Boreal owls range over larger areas in regions where food of the sort eaten by small mammals is sparse than they do in regions where such food is abundant.
C.    After their young hatch, boreal owls must hunt more often than before in order to feed both themselves and their newly hatched young
D.    Sometimes individual boreal owls hunt near a single location for many weeks at a time and do not range rather than a few hundred yards.
E.    The boreal owl requires less food, relative to its weight, than is required by members of other owl species.



选B，但B不是重复原文了么？题干说了BO生活的地方吃得少，B选项的意思不也是BO生活的地方吃得少吗

Queeny11

原文说 BO依靠吃small mammal.....small mammal因为少 所以BO范围广
B说的是。。smll mammal 吃的一种食物。。这种食物少。BO范围广。。

bonnie0715

有比较才有鉴别

题目说他大范围找是因为食物少
B说食物少的地方的BO比食物多的地方的BO范围大。相当于后面那个是对照组。

rainbowmanutd

原文说 BO依靠吃small mammal.....small mammal因为少 所以BO范围广
B说的是。。smll mammal 吃的一种食物。。这种食物少。BO范围广。。

-- by 会员 Queeny11 (2010/5/8 18:20:17)

明白了，没看仔细 呵呵