Which of the following is the best title for the text
Animals and Pain
B. Human Beings and Pain
C. Painful Stimuli and Reactions
D. Nerve System and Pain
查看答案
We can safely conclude from the text that ______.
A. vertebrates feel pain because they have vertebrae
B. animals do not experience pain although they are equipped with all the necessary neurological structures
C. animals do not feel pain because they haven't developed fore-brains yet
D. none of the above
The flight to Shanghai will leave from this ______ at the airport.
A. stop
B. terminal
C. end
D. termination
What is true about the teacher mentioned in Paragraph 3
A. He was recovered from paralysis.
B. He realized that he was luckier than others.
C. He thought highly of the rehabilitation place.
D. He had a car accident and almost killed himsel
用HPLC法测得某组分的保留时间为1．5min，半峰宽为0．20cm，记录纸速度为2．0cm/min，则柱效为
A. 2492
B. 623
C. 1800
D. 1246
E. 3600
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