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A. division B. sufficient C. constant D. depths E. exterior F. whereas G. stable H. proved I. external J. measuring K. environme
A. division B. sufficient C. constant D. depths E. exterior F. whereas G. stable H. proved I. external J. measuring K. environme
admin
2017-02-18
31
问题
A. division B. sufficient C. constant D. depths E. exterior
F. whereas G. stable H. proved I. external J. measuring
K. environment L. inadequate M. making N. bottom O. characterizing
For centuries it has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of【C1】______ the difference have become more accurate and meaningful over time, but popular terminology still reflects the old【C2】______into "warm blooded" and "cold blooded" species; warm blooded included mammals and birds, 【C3】______all other creatures were considered cold blooded. As more species were studied, it became evident that this classification was【C4】______. A fence lizard usually has a body temperature only a degree or two below that of humans and so is not cold. Therefore the next distinction was made between animals that maintain a【C5】______body temperature and those whose body temperature varies with their environment. But this classification also【C6】______inadequate, because among mammals there are many that vary their body temperatures during hibernation. Furthermore, many invertebrates that live in the【C7】______of the ocean never experience a change in the chill of the deep water, and their body temperatures remain constant. The current distinction is between animals whose body temperature is regulated chiefly by internal metabolic processes and those whose temperature is regulated by the【C8】______. The latter do so mainly by moving to favorable sites or by changing their exposure to【C9】______ sources of heat. Mammals and birds also regulate their temperature by choosing favorable environments, but primarily they regulate their temperature by【C10】______a variety of internal adjustments.
【C1】
选项
答案
O
解析
空格位于介词of后面,名词the difference前面,由此判断此处填入动词的现在分词形式。由后半分句中的“warm blooded,,和“cold blooded”的分类可知,此处是要表达随着时间的推移,描绘这种差异的方式越来越准确和有意义。characterizing“描述……的特征”符合题意。本文通篇描述的是以不同的体温调节方式将动物进行分类。没有涉及测量的问题,measuring“测量,度量”不符合语义。
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专业英语四级
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