第11题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. To discuss conference. B. To make a hotel reservation. C. To talk about different kinds of rooms. D. To talk about doing business. 参考答案:B 答案解析:[听力原文] Q: What is the conversation mainly about [一点即通] 男士打电话的主要目的是预订宾馆客房和会议室,故选B项。
第27题: [单项选择]对于普通水泥拌制的混凝土,其养护日期不得少于()天。 A. 9 B. 7 C. 5 D. 3 参考答案:B 答案解析:混凝土浇水养护日期为:对硅酸盐水泥、普通水泥和矿渣水泥拌制的混凝土不得少于7昼夜;掺用缓凝型外加剂或有抗渗性要求的混凝土,不得少于14昼夜;当用矾土水泥时,不得少于3昼夜