The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the ho

The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the hospital with respiratory（呼吸的） illnesses and led to calls for laws to control the pollution.
Pan Shiyi, a celebrity real estate developer said he is planning to propose (提案) a Clean Air Act to the local government. As a representative to the Beijing Municipal People's Congress, he started an online survey at 9:20 a.m. Within three hours, more than 25,000 web users, or 99 percent of total respondents（应答者）, welcomed his proposal on Sina Weibo, China's Twitter.
They have good reasons to stand alongside Pan. The latest round of haze（雾霾）reduced visibility to under 500 meters in many parts of the city. The smog has also led to a great increase in respiratory illnesses, particularly among children and the elderly. Anxious parents and doctors almost all blame the smoggy air for the illnesses. Though most schoolchildren are home for the winter holidays, the bad air can easily move indoors. Besides, ordinary medical masks fail to provide adequate protection, so some people have turned to gas masks and respirators（呼吸器）.
The causes of the scary smog are rather mysterious, though experts blame excessive emissions and the mountains around Beijing that trap pollution in winter, unless there is adequate wind to clear it away. Some critics have pointed fingers at China’s top two oil firms, China National Petroleum Corp and China Petrochemical Corporation, saying the companies’ outdated production technologies produce large quantities of substandard, high-polluting gas fuel.
Meanwhile, concerned Beijingers have moved their brainstorming sessions to cyberspace. If Pan’s proposal for a Clean Air Act is adopted, netizens say the new law should include items providing for “car-free days” in times of smog, higher standards for vehicle fuel, stricter restrictions on industrial and exhaust gas emissions, and more effective protection for the public.
Beijing is not the only city that has ever lost the blue sky. Five days of thick fog caused thousands of deaths in Britain in December 1952, urging the government to pass the first Clean Air Act in 1956, which introduced smokeless zones and cleaner fuels to reduce pollution. That may provide some experience for Beijing to refer to.
【小题1】What can we learn from the passage?A．People are clear about the causes of the smoggy weather.B．Children staying indoors will not get respiratory illnesses.C．Smog is worse for people with lower resistance to diseases. D．Masks can give people protection against the smoggy weather.【小题2】Britain is mentioned in the last paragraph to .A．suggest Beijing should learn from other countriesB．let people know many places have this problemC．tell people the situation in Britain is worseD．call on the government to pass Britain’s Clean Air Act【小题3】What’s the best title for this passage？A．The Use of Gas masks and RespiratorsB．Beijingers Call for Clean Air Act C．Effective Protection for Blue SkyD．The Mysterious Causes of the Scary SmogC

(答案→)C 解析：本文主要讲述的是雾霾天气对北京产生的巨大影响，想要中国在空气治理这一方面做出更多的努力。【小题1】C 推理题。根据文章第三段2,3行The smog has also led to a great increase in respiratory illnesses, particularly among children and the elderly.可知雾霾对于有呼吸道疾病的人影响很大，尤其的老人和和孩子。故C项正确。【小题2】A 推理题。根据文章最后一段Five days of thick fog caused thousands of deaths in Britain in December 1952, urging the government to pass the first Clean Air Act in 1956, which introduced smokeless zones and cleaner fuels to reduce pollution. That may provide some experience for Beijing to refer to可知是为中国的治理雾霾提出了一个学习的对象，就是1956年的英国所采取的措施。故A正确。【小题3】B 主旨大意题。根据文章第一段可知本文主要讲述的是雾霾天气对北京产生的巨大影响，想要中国在空气治理这一方面做出更多的努力。故B正确。

就是这个解释