19．Leaders of the World Health Organization say they are concerned about the air quality and health efiects on citizens during a recent outbreak of heavy pollution in Beijing．Still，they said they were unsure of the exact amount the air pollution takes on any person's body，casting doubts on local reports tying the area's dirty air to particular cases of illness．
   Speaking at a briefing（情況介紹會）on Tuesday，the WHO's Western Pacific regional director，Shin Young-Soo，cited（列舉）reports about poor air quality causing lung cancer in recent weeks．
"The WHO is skeptical of the information，"she said．"We're cautious of whether the illness is related to air po11ution．We know it has an impact on health，but we don't know how much．"
    The officials didn't cite particular reports．The comments follow a number of articles since late last year connecting some cases of diseases like lung cancer with pollution，．including one in November regarding an 8-year-old girl．
   The health impact of Beijing's gray skies has been on the minds of many over the past week．Local authorities on Tuesday preserved an orange alert（警報）一the city's second highest pollution-warning level-and again warned people to stay indoors．Experts widely agree that small particulates（顆粒） known as PM2.5 carry significant short-and long-term health risks，particularly with children．Other studies find a certain link between pollution and shorter life spans．
Chinese state media have noted a rise in cancer levels in Beijing，without specifying（具體說明）whether the new cases are the main result of pollution，smoking，other sources or some combination．
Bernhard Schwartlander，the organization's China chief，said he is concerned and has been in contact with national authorities．"There is no easy solution，"Dr．Schwartlainder said，adding that solving the problem requires managing industry and the economy．WHO leaders advised citizens．to stay indoors and limit exposure to the harmful particulates．When asked if wearing a face mask has any proven efficacy in preventing health effects of air pollution，Dr．Schwartlainder said，"Whatever you do，it's better than nothing．"

68．We can learn from the passage thatA．
A．in case of an orange alert，we had better not go outside
B．the case of the girl with lung cancer was little'linked to air pollution
C．cancer levels in Beijing are rising due to heavy air pollution
D．it is widely agreed that pollution shortens life spans very slightly
69．According to Dr．Schwartlander，the ways to solve the problem includeC．
A．contacting the national authorities     
B．being exposed less to harmful particulates
C．managing the enterprise and economy  
D．preventing health effects of pollution
70．What would be the best title of this passage？D
A．The dangers of heavy pollution
B．The impacts of pollution on health
C．The importance of protecting the environment
D．The uncertainty of relationship between pollution and health．

分析 本文屬于說明文閱讀，作者通過這篇文章主要向我們描述了世界衛(wèi)生組織尚不確定霧霾對人體健康的具體危害，我們知道霧霾對人們的身體健康有影響，但我們不確定有多大的影響，因此我們只能盡量減少接觸污染嚴(yán)重的環(huán)境，不管采取哪種措施，都比什么都不做要好．

解答 68．A．細(xì)節(jié)理解題．根據(jù)文章第五段"Local authorities on Tuesday preserved an orange alert（警報）一the city's second highest pollution-warning level-and again warned people to stay indoors"，當(dāng)?shù)赜嘘P(guān)部門周二維持橙色預(yù)警（污染警報級別第二級），并且再度警告人們留在室內(nèi)；故選A．
69．C．細(xì)節(jié)理解題．根據(jù)文章最后一段．"There is no easy solution，"Dr．Schwartlainder said，adding that solving the problem requires managing industry and the economy，可知解決方案為管理行業(yè)和經(jīng)濟(jì)；故選C．
70．D．推理判斷題．通讀全文，可知文章主要再講無法判斷環(huán)境污染和健康的關(guān)系，因此最佳標(biāo)題為污染與健康關(guān)系的不確定性；故選D．

點評 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進(jìn)行合乎邏輯的推理判斷．

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