再看选项2(正解): The circadian period of an animal's internal clock is genetically determined and basically unchangeable. 统观第二段我只能找到Indeed, stability of the biological clock's period is one of its major features这么一句来支持它。反倒是选项4Animals have internal clocks that influence their activities even when environmental cues are absent.我还觉得比较靠谱。(我选的就是146)
再看选项2(正解): The circadian period of an animal's internal clock is genetically determined and basically unchangeable. 统观第二段我只能找到Indeed, stability of the biological clock's period is one of its major features这么一句来支持它。反倒是选项4Animals have internal clocks that influence their activities even when environmental cues are absent.我还觉得比较靠谱。(我选的就是146)
正确选项是这句话“Indeed, stability of the biological clock's period is one of its major features”的同义变换。第四个选项的主旨是:动物的内在生物钟影响其行为。这根本不是这段,也不是这个文章最主要的意思。所以不对。