A-A+
We can infer from the first paragraph that ___
问题详情
We can infer from the first paragraph that ______.
A．animals feel pain because their pupils dilate, their pulse rate and blood pressure rise
B．when body stimuli are isolated from the higher nervous centres, animals won"t withdraw the stimulated limb
C．we will never know whether or not animals feel pain because they cannot speak
D．people conduct a lot of experiments on animals in order to get knowledge of pain
参考答案
正确答案：D
解析：本题为推论题，从原文可以看出，人们仍未弄清动物对于疼痛是否感觉，瞳孔扩大等只是表象。所以选项A不准确。选项B并不能从原文得出。选项C中的will never不准确。从第一段“When such stimuli are applied．．．”开始描述在动物身上实验，结合首句，可以得出选项D。
