第15题: [单项选择]Questions 14-17 are based on the following dialogue.What is the main purpose of the man’s trip A. To improve his skating techniques. B. To climb mountains. C. To take a vacation. D. To learn to ski. 参考答案:C 答案解析:[听力原文]14-17 M: I have been studying too much and need a change. So I have just made plans to go a
第28题: [单项选择]下列防火涂料的类型中,()的分散介质和稀释剂采用有机溶剂,存在易燃、易爆、污染环境等缺点,其应用日益受到限制。 A. 溶剂型防火涂料 B. 水性防火涂料 C. 有机型防火涂料 D. 无机型防火涂料 参考答案:A 答案解析:本题涉及的考点是防火涂料的类型。根据防火涂料所用的分散介质,可分为溶剂型防火涂料和水性防火涂料。溶剂型防火涂料的分散介质和稀释剂采用有机溶剂,存在易燃、易爆、污染环境等缺点,其应用日益受到限制。水性防