This passage is most probably taken from a ______. [br] Which of the following i

游客2024-07-02  12

问题 This passage is most probably taken from a ______. [br] Which of the following is TRUE according to the passage?

选项 A、Birds evolved from reptiles.
B、It is known to all that flight developed when a ground-living form began to flap its wings to increase its running speed.
C、It is known to all that flight developed when a tree-climbing form used imperfect wings to aid it in leaping from tree limb to tree limb.
D、The evolution from reptile to the bird concluded about 75 thousand years ago.

答案 A

解析 本题为判断题,可用排除法。选项A与第二段第一句"Birds evolved from reptiles"一致,因此正确;第二段第三句为一复杂长难句,其主干为"It is still unknown whether…when…or when…",此句中whether和or的内容均为unknown,而B、C两项是known,因此排除;选项D中量词单位thousand与原文的million不符,属偷换概念。
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