第5题: [单项选择]A. We learned that Mary is going to Hawaii. B. We learned that Mary has traveled all over the world. C. We learned that Mary like postcards. D. We learned that Mary is going on vacation. 参考答案:C 答案解析:[解析] W:I guess I’ll send Mary a postcard from Hawaii when I go there on my vacation. M:I’m su
第12题: [单项选择]根据《建筑施工扣件式钢管脚手架安全技术规范》JGJ130-2011,5.1,下列关于脚手架基本设计规定说法错误的是() A. 脚手架的承载能力应按概率极限状态设计的要求,采用分项系数设计表达式进行设计 B. 计算构件的强度、稳定性与连接强度时,应采用荷载效基本组合的设计值 C. 脚手架中的受弯构件,尚应根据正常使用极限状态的要求验算变形 D. 验算脚手架构件变形时,应采用荷载效应最不利组合的设计值 参考答案:D