第2题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. Four contestants failed to win prizes. B. The man ate during the show. C. The woman missed the show. D. Five contestants won cars. 参考答案:C 答案解析:[听力原文] W: There was a new quiz show on television last night, but we were just sitting down to
第7题: [多项选择]混凝土配合比设计需要确定的材料用量比例关系包括()。 A. 单位用砂量 B. 水灰比 C. 灰砂比 D. 用砂率 E. 单位用水量 参考答案:B, D, E 答案解析:混凝土配合比的设计,实质上就是确定四种基本材料用量的三个比例关系,这三个比例关系可以用三个参数表示,即:水灰比、砂率和单位用水量。