题目内容

回归系数β2=0.2562的经济意义为()。

A. 我国居民家庭居住面积每增加1平方米，居民家庭电力消耗量平均增加0. 2562千瓦小时
B. 在可支配收入不变的情况下，我国居民家庭居住面积每增加1平方米，居民家庭电力消耗量平均增加0. 2562千瓦小时
C. 在可支配收入不变的情况下，我国居民家庭居住面积每减少1平方米，居民家庭电力消耗量平均增加0. 2562千瓦小时
D. 我国居民家庭居住面积每增加1平方米，居民家庭电力消耗量平均减少0. 2562千瓦小时

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Some people claim that, in the age of television, reading books is not as important as it once was and that people can learn as much by watching television as they can by reading books. Do you agree or disagree with this statement？ Write an essay of about 400 words.
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在其他条件不变的情况下，建筑工人工资提高将导致新建房屋()

A. 供给曲线左移并使房子价格下降
B. 供给曲线左移并使房子价格上升
C. 供给曲线右移并使房子价格下降
D. 供给曲线右移并使房子价格上升

心电图表现为：①相当于一系列连续快速的房性或交界性早搏，其频率大多数为180次/分，节律一般绝对规则。②QRS波群形态基本正常，其时间<0.10秒。③st-t段无变化。分析其临床意义。

应急预案重要的特征是要有针对性和可操作性，因此，应急策划必须明确预案的对象和可用的应急()情况。

A. 现场
B. 资源
C. 条件