第4题: [单项选择]关于急性一氧化碳中毒的发病机制哪项是错误的 A. 主要为组织缺氧 B. CO与Hb有较强亲和力 C. COHb失去携氧能力 D. COHb易解离 E. 全身和中枢缺氧症状为主 参考答案:D 答案解析:CO与Hb结合力较O2与Hb的结合力大240倍,而解离速度是O2Hb的1/3600,故不易解离。
第17题: [单项选择]Questions 29 to 31 are based on the passage you have just heard. A. Education. B. Public security. C. Administration. D. Transportation. 参考答案:B 答案解析:[听力原文] Which of the following costs the largest amount of public money according to the speaker