第3题: [单项选择]正常照明网络电压应为( )。 A. 110V; B. 220V; C. 380V; D. 380V/220V。 参考答案:D
第4题: [单项选择]某大型工程位于某市市郊,周围道路属一般路段,施工临时住宿、食堂均设置在现场围墙内。在开工前,施工单位制订了施工安全技术措施,并向有关人员进行了技术交底,由于工期较紧,施工单位向有关部门申请夜间施工,并承诺保证文明施工。 当建筑施工高度超过( )时,为防止单纯依靠消防器灭火不能满足要求,应配备有足够的消防水源和自救的用水量。 A. 10 m B. 20 m C. 30 m D. 40 m 参考答案:C
第5题: [单项选择]The ad for mineral water is cited as an example of the way popular culture ______. A. (A) promotes symbols of status B. (B) excludes those unwilling to consume C. (C) fosters unrealistic expectations D. (D) co-opts the role of nutritionists 参考答案:C
第8题: [单项选择]Which of the following is NOT the result of laboratory experiments A. Low concentrations B. Fall in lung function C. Irritability of the lungs D. Air way inflammation 参考答案:A 答案解析:选择依据是原文第二段这样一句话:Even at quite low concentrations there is a reversible fall in lung function,an incr