2. 外语
  3. In the 1950’s, accumulating scientific evidence【C1】______cigarette smoking and lung cancer made a【C2】______impact【C3】______the s

In the 1950’s, accumulating scientific evidence【C1】______cigarette smoking and lung cancer made a【C2】______impact【C3】______the s

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问题    In the 1950’s, accumulating scientific evidence【C1】______cigarette smoking and lung cancer made a【C2】______impact【C3】______the smoking public. During this period many health agencies declared smoking to be a【C4】______hazard. US Surgeon GeneralLeroy E. Burney said in 1957, "The weight of the evidence is increasingly pointing to one direction: that【C5】______smoking is one of the causative factors in lung cancer." The initial reports had the heaviest impact, so【C6】______total cigarette production【C7】______in 1953 and again in 1954.【C8】______reports  appeared to have less【C9】______on smoking habits, and by 1957 cigarette production had【C10】______above the 1952 level.
【C11】______four voluntary health organizations【C12】______president John F. Kennedy to【C13】______a commission to study the widespread implications  of the tobacco problem, the Surgeon General’ s Advisory Committee  on Smoking and Health was【C14】______in 1962 to review and evaluate  all【C15】______scientific data.  When its report,  Smoking and Health, was released in early 1964, cigarette【C16】______again declined【C17】______. Pipe and cigar smoking increased. More than 350 000 copies of the report were【C18】______and sold.【C19】______abstracts and pamphlets were prepared by the Public Health Service and other organizations【C20】______a massive educational campaign on the hazards of cigarette smoking.
【C5】
选项 A、statistical
B、poisonous
C、collective
D、excessive
答案D
解析 根据题意“过量吸烟是诱发肺癌的一个因素”，故选D，其他选项明显不符合题意。
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