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Air quality in Britain has improved considerably in the last 30years. Total emissions of smoke in the air haverisen by over 85 per cent since 1950. The domestic (1)____smoking control program has been particularly important in (2)____achieving this result. London and other major cities are no (3)____longer have the dense smoke-laden “smogs” of the1950s, and in central London winter sunshine has (4)____increased about 70 per cent since 1958. (5)____ Since 1990, daily air pollution data from theBritish monitoring network has been made available (6)____to the public by the Department of the Environ-ment’s Air Quality Bulletins. These give the concen-trations of three main pollutants-ozone, nitrogendioxide and sulfur dioxide –and grade air qualityon a scale between “very weak” and “very (7)____good”. The information features in television andradio weather reports, appears in many national and (8)____local newspapers. Therefore, the data are available (9)____on a special free telephone number and on videotext systems. A comprehensive review of the issue of urbanair quality was published in January 1992. Threeindependent committees of which experts have been (10)____established to advise on different aspects of the problem, andwill set guidelines and targets for air quality. The network isalso being extended and upgraded at a cost of £10 million.
下列定义abc过程的语句,正确的是()
旅游团中有游客在游览时遭到蜂蛰,导游员应该怎么处理?
上颌神经属于().
Excel 2000的函数FORECAST可用于()。
说明生物膜的物质转运与调节机理。
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下列哪项细胞化学染色对急粒与急单的鉴别意义不大()
当两种物体接触,其间距离达到或小于2.5×10-7时,将发生电子转移,并在分界面两侧出现大小相等、极性相反的两层电荷。当两种物体迅速分离时即可能产生()。
霍艳和丈夫来到某城市打工,由于人生地不熟,做的小本生意总是亏本,导致霍艳的丈夫性情大变,对霍艳总是看不顺眼。一天霍艳的丈夫让她帮忙买酒,她只说了一句“整天喝,生意还做不做了?”就惹来她丈夫一顿拳打脚踢。对于丈夫的变化,霍艳难以接受,萌生了离婚的念头,于是请社会工作者小萱帮忙拿主意。小萱协助霍艳分析了其个人及家庭的处境和可能的发展趋势,但并没有劝霍艳离婚或者不离婚。这体现了社会工作价值观的()。
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