問題詳情

        From the sharp quills of the porcupine to the poisonous skin of some kinds of frogs, animals rely on a variety of different means for protection. One of the most interesting methods for “disguise” and refers to an animal’s ability to mask itself from the eyes of predators by blending into the surrounding environment. Although the body shapes of a small number of insects do contribute to the camouflage effect, most animals depend on coloration of skin, fur, or feathers to help them “disappear” into the backdrop of their local environments.          Various types of birds use camouflage as their primary means of defense. The woodcock, for example, when on the ground, is quite vulnerable to attack. Although woodcocks have strong running legs, they require several seconds to take flight. However, the color of their feathers—brown, black, gray and russet—keeps them from being spotted on the forest floor. The Whip-poor-will uses camouflage in the same manner; it is practically invisible when perched motionless on a branch. 

16.It can be inferred from paragraph 1 that a porcupine is ___.
(A) a kind of animal
(B) a type of poison
(C) a method of protection
(D) a species of frog

參考答案

答案：A
難度：適中0.537037
統計：A(29),B(2),C(21),D(1),E(0)

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