求教 Prep07-Q32 一道BF题目分析

teddybearj4

Paleontologist: About 2.8 million years ago, many species that lived near the ocean floor suffered substantial population declines.These declines coincided with the onset of an ice age. The notion that cold killed those bottom-dwelling creatures outright is misguided, however; temperatures near the ocean floor would have changed very little.Nevertheless, the cold probably did cause the population declines, though indirectly.Many bottom-dwellers depended for food on plankton, small organisms that lived close to the surface and sank to the bottom when they died.Most probably, the plankton suffered a severe population decline as a result of sharply lower temperatures at the surface, depriving many bottom-dwellers of food.

In the paleontologist's reasoning, the two portions in boldface play which of the following roles?

(A) The first introduces the hypothesis proposed by the paleontologist; the second is a judgment offered in spelling out that hypothesis.

(B) The first introduces the hypothesis proposed by the paleontologist; the second is a position that the paleontologist opposes.

(C) The first is an explanation challenged by the paleontologist; the second is an explanation proposed by the paleontologist.

(D) The first is a judgment advanced in support of a conclusion reached by the paleontologist; the second is that conclusion.

(E) The first is a generalization put forward by the paleontologist; the second presents certain exceptional cases in which that generalization does not hold.

NN能不能分析一下这题的句子间关系呀？自己在做BF的时候总是一下子很难弄清楚！自己试着分析了一下，NN们来拍砖啊！！！

Paleontologist: About 2.8 million years ago, many species that lived near the ocean floor suffered substantial population declines.These declines coincided with the onset of an ice age.（background info）The notion that cold killed those bottom-dwelling creatures outright is misguided,however; temperatures near the ocean floor would have changed very little. （phenomenon ?）Nevertheless, the cold probably did cause the population declines, though indirectly.(conclusion ? ) Many bottom-dwellers depended for food on plankton, small organisms that lived close to the surface and sank to the bottom when they died. (phenomenon ?) Most probably, the plankton suffered a severe population decline as a result of sharply lower temperatures at the surface, depriving many bottom-dwellers of food.(evidnence? to support the conclusion)

现在做BF题目总是在选项间徘徊犹豫很久，最后又选了个错误答案！请教NN肿么办啊？

teddybearj4

大家忽略之，我发错区了~~~
斑竹大人，能不能帮我删了这个贴子~