下图是某商品在2012年9月至2013年2月的价格走势。下列对于该图理_爱下问搜题

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问题单项选择题

下图是某商品在2012年9月至2013年2月的价格走势。下列对于该图理解正确的是（）

①价格处于C点时，该商品的生产者可能会扩大生产规模

②价格处于D点时，该商品处于卖方市场

③价格从B点到C点，该商品的替代品需求量会增加

④价格从C点到D点，该商品的互补品需求量会减少

A.①②

B.②④

C.①③

D.③④

答案

参考答案：B

解析：

通过读图可知，当价格处于C点时，该商品的价格处于这一段时期的最低点，此时该商品的生产者获利减少甚至亏本，因此不会扩大生产规模，故①不能入选；当价格处于D点时，该商品的价格处于这一段时期的最高点，此时该商品供不应求，该商品生产者在市场竞争中处于优势地位，该商品处于卖方市场，故②可以入选；该商品价格从B点到C点移动时，表明该商品的价格在下降，此时该商品的需求量会增加，该商品的替代品需求量会减少，故③不能入选；该商品价格从C点到D点移动时，表明该商品的价格在上涨，此时该商品的需求量会减少，该商品的互补品需求量也会随之减少，故④可以入选。因此，答案是B项。

考点：本题考查卖方市场的特点、价格变动对生产生产者的影响、价格变动对相关商品需求量的影响。

单项选择题

项目建成后的直接效果和作用，主要是( )的直接效果。

A．社会与经济
B．经济与环境
C．社会与环境
D．经济与效益

填空题

Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.

Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.