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问题 单项选择题

大面积深度烧伤的病人合并ARDS时，应采用下列哪些措施

A．大量输血

B．禁止实施切痂植皮术

C．加快输液速度

D．积极清除深度烧伤坏死组织

E．创面涂碘酊或碘伏

答案

参考答案：D

单项选择题

（）是教师在面临实际的课堂情境时，所具有的课堂背景知识以及与之相关的知识。

A.实践性知识

B.本体性知识

C.理论性知识

D.条件性知识
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单项选择题

Until recently, most population growth has occurred in relatively dense urban environments. In (91) words, even if we were witnessing rapid population growth, that would not mean that the (92) were filling in with people. (93) , the urban areas would tend to become more crowded. Historically, we find that people have moved to (94) the jobs were. Jobs were usually in ports or locations with many natural (95) . After transportation became relatively cheap, other geographical locations became (96) of economic activity. One factor that determines where people will move to, even when transportation becomes cheap, is (97) . And individuals working in cities (98) higher incomes than those working in (99) areas. Hence, population has tended until the 1970s to (100) in our major urban centers. Recently population has (101) out of the Northeast to the South and to the West for the more pleasant climates. If people did not (102) from living in large cities, there would likely be a much more even population distribution (103) our entire land area. Probably, if this (104) the case, there would be less concern over population (105) Indeed, one need only (106) a cross-country drive or plane trip to realize how (107) populated these United States really are. This is not to say that we should or should not do something about (108) growth. The shortage of people in certain areas merely demonstrates that overpopulation in the United States is really only a problem in (109) urban environments. And this problem may be slowly correcting (110) .

A．channels

B．routes

C．sources

D．centers
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