第15题: [单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard. A. Work. B. Food. C. Social status. D. Age. 参考答案:D 答案解析:[听力原文]29-31 A critical factor that plays a part in people’s susceptibility to colds is age. T
第16题: [单项选择]()是一种快速提升工具。 A. 救援三脚架 B. 救生气垫 C. 起重气垫 D. 救生抛投器 参考答案:A