第13题: [单项选择]The relationship between exposure to ______ has not yet been determined. A. ozone and fall in lung function B. ozone and lung diseases such as asthma C. nitrogen dioxide and worse lung function D. smog and chronic bronchitis and emphysema 参考答案:D 答案解析:判断依据是来自原文中的一句话“It is suspected that long-term exposure to smog may result in chronic bronchitis(支气管炎
第24题: [单项选择]下面哪一项不是硝酸甘油的不良反应 A. 头颈部皮肤潮红 B. 头痛 C. 体位性低血压及晕厥 D. 发绀 E. 水肿 参考答案:E 答案解析:硝酸甘油多数不良反应是血管舒张作用所继发,如心率加快、搏动性头痛,大剂量可出现直立性低血压及晕厥。眼内血管扩张则使升高眼压。剂量过大,反而会使耗氧量增加而加重心绞痛的发作。连续用药后,可出现耐受性。禁