【单选题】
For centuries {{U}} (35) {{/U}} has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of {{U}} (36) {{/U}} the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division {{U}} (37) {{/U}} " warm blooded" and "cold blood- ed " species; warm blooded included mammals and birds, {{U}} (38) {{/U}} all other creatures were considered cold bloodeD、{{U}} (39) {{/U}} more species were studied, it became evident that this classification was {{U}} (40) {{/U}}A、fence lizard usually has a body temperature only a degree or two below {{U}} (41) {{/U}} of humans and so is not colD、{{U}} (42) {{/U}} the next distinction was made between animals that maintain a {{U}} (43) {{/U}} body temperature and those whose body temperature varies with their environment.But this classification also proved inadequate, {{U}} (44) {{/U}} among mammals there are many that vary their body temperatures during hibernation. {{U}} (45) {{/U}} many invertebrates that live in the {{U}} (46) {{/U}}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 {{U}} (47) {{/U}} chiefly by internal metabolic processes and those whose temperature is regulated by the {{U}} (48) {{/U}}. The latter do so mainly by moving to favorable sites or by changing their exposure to {{U}} (49) {{/U}} sources of heat. Mammals and birds also regulate their temperature by choosing favorable environments, but primarily they regulate their temperature by making a variety of internal {{U}} (50) {{/U}}.
B．of
C．by
D．with
网考网参考答案：A
网考网解析：
[解析] 根据同源动词divide的用法，可以推出此处应该选择介词into与之搭配。 [点睛] 固定搭配。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
发布评论 查看全部评论