第8题: [单项选择]What time is it now A. To a grocery. B. To a gas station. C. To a garage. D. To a railway station. 参考答案:A 答案解析:[听力原文] M: I’m leaving now. Do you need anything W: Pick up a bar of soap and some ice cream f
第19题: [单项选择]对不同可燃物燃烧说法错误的是( )。 A. 气态可燃物是先蒸发后燃烧 B. 气态可燃物通常为扩散燃烧 C. 液态可燃物是先蒸发后燃烧 D. 固态可燃物是先热解再燃烧 参考答案:A 答案解析:火灾中气态可燃物通常为扩散燃烧,即可燃物和氧气边混合边燃烧;液态可燃物(包括受热后先液化后燃烧的固态可燃物)通常先是蒸发为可燃蒸气,可燃蒸气与氧化剂再发生燃烧;固态可燃物先是通过热解 等过程产