gre考试阅读真题解析(B)_GRE阅读

gre考试阅读真题解析(B)

　　 Animals on the periphery of a group tended to be less capable of defending themselves from attack by predators than animals located in the interior of the group.

　　 Animals on the periphery of a group tended to bear marks that were more distinctive to predators than animals located in the interior of the group.

　　 Animals on the periphery of a group tended to have shorter life spans than animals located in the interior of the group.

　　18. Which of the following best describes the relationship of the second paragraph to the first?

　　 The second paragraph relies on different evidence in drawing a conclusion similar to that expressed in the first paragraph.

　　 The second paragraph provides further elaboration on why an assertion made at the end of the first paragraph proves to be true in most cases.

　　 The second paragraph provides additional information in support of a hypothesis stated in the first paragraph.

　　 The second paragraph provides an example of a case in which the assumption described in the first paragraph is unwarranted.

　　 The second paragraph describes a phenomenon that has the same cause as the phenomenon described in the first paragraph.

　　19. It can be inferred from the passage that the author of the passage would be most likely to agree with which of the following assertions about vigilant behavior?