第17题: [单项选择]A. The woman had been planning for the conference. B. The woman called the man but the line was busy. C. The woman didn’t come back until midnight. D. The woman had guests all evening. 参考答案:D 答案解析:[听力原文] M: I thought you were going to call me last night about the plans for the conference on la
第18题: [多项选择]气体灭火系统适用于扑救()。 A. A类火灾中一般固体物质的表面火灾 B. B类火灾 C. 可切断气源的气体火灾 D. 带电设备与电气线路的火灾 E. 强氧化剂、含氧化剂的混合物火灾 参考答案:A, B, C, D