A. Traffic accidents are mainly caused by motorists. B. Thousands of people the world over are killed each year. C. The laws of some countries about driving are too lax. D. Only stricter traffic laws can prevent accidents. 参考答案:D 答案解析:只有更严格的交通法规才能制止交通事故。这在最后一段的结论中体现得最清楚。前面几段只是讲造成事故的种种原因。其目的就是:“是制定世界交通法规以减少无渭的生命浪费的时候了。”
第2题: [单项选择]检查诊断腮腺区肿物时,以下哪项是不恰当的 A. 针吸细胞学检查 B. CT检查 C. B超检查 D. 活体组织检查 E. 涎腺造影 参考答案:D