汉乐府中《江南》一诗，通篇使用比兴手法，富有表现力。()

It can be inferred from the text that animal emotions ______ .A．originate from natural evolutionB．remain uncertain until we are sureC．develop faster in social encountersD．are as rich and deep as human emotions 点击查看答案

Some people maintain a scientific skepticism because they______.A．fail to realize what uncertainty really means to scienceB．are uncertain about whether animals have emotionsC．prefer to put off whatever they do in scienceD．ignore the nature of scientific research 点击查看答案