问题 问答题 简答题

一般根据环境保护的目标来确定大气总量控制区域的大小。在确定总量控制区域时通常要注意以下几个方面:

答案

参考答案:

1.对于大气污染严重的城市和地区,控制区一定要包括全部大气环境质量超标区,以及对超标区影响比较大的全部污染源。非超标区根据未来城市规划、经济发展适当地将一些重要的污染源和新的规划区包括在内。

2.对于大气污染尚不严重,但是存在着孤立的超标区或估计不久会成为严重污染的区域,总量控制区的划定方法同1。如果仅仅要求对城市中某一源密集区进行总量控制则可以将该源密集区及它的可能污染区划为控制区。

3.对于新经济开发区或新发展城市,可以将其规划区作为控制区。

4.在划定总量控制区时,无论是哪种情况,都要考虑当地的主导风向,一般在主导风向下风方位,控制区边界应在烟潭的最大落地浓度以远处,所以在该方位上控制区应该比非主导风向上长些。

5.总量控制区不宜随意扩大,应以污染源集中区和主要污染区为主,它不同于总量控制模式的计算区,计算区要比控制区大,大出的范围由控制区边缘处的烟源的最大落地浓度的距离而定。

单项选择题

Modern liberal opinion is sensitive to problems of restriction of freedom and abuse of power. (1) , many hold that a man can be injured only by violating his will, but this view is much too (2) . It fails to (3) the great dangers we shall face in the (4) of biomedical technology that stems from an excess of freedom, from the unrestrained (5) of will. In my view, our greatest problems will be voluntary self-degradation, or willing dehumanization, as is the unintended yet often inescapable consequence of sternly and successfully pursuing our humanization (6) .

Certain (7) and perfected medical technologies have already had some dehumanizing consequences. Improved methods of resuscitation have made (8) heroic effort to "save" the severely ill and injured. Yet these efforts are sometimes only partly successful: They may succeed in (9) individuals, but these individuals may have sever brain damage and be capable of only a less-than-human, vegetating (10) . Such patients have been (11) a death with dignity. Families are forced to bear the burden of a (12) "death watch".

(13) the ordinary methods of treating disease and prolonging life have changed the (14) in which men die. Fewer and fewer people die in the familiar surroundings of home or in the (15) of family and friends. This loneliness, (16) , is not confined to the dying patient in the hospital bed. As a group, the elderly are the most alienated members of our society: Not yet (17) the world of the dead, not deemed fit for the world of the living, they are shunted (18) . We have learned how to increase their years, (19) we have not learned how to help them enjoy their days. Yet we continue to bravely and feverishly push back the frontiers (20) death.

1()

A.Indeed

B.Likewise

C.Therefore

D.Furthermore

判断题