第24题: [多项选择]钢管脚手架中,( )的作用主要是保证脚手架的整体刚度和稳定性,增加抵抗垂直和水平力作用的能力。 A. 立杆 B. 连墙杆 C. 剪刀撑 D. 斜撑 E. 扣件 参考答案:B,C,D 答案解析:[解析] 本题考核的是钢管脚手架各部件的作用。钢管脚手架的荷载由小横杆、大横杆和立杆组成的承载力构架承受,并通过立杆传给基础。剪刀撑、斜撑和连墙杆主要是保证脚手架的整体刚度和稳定性,增加抵抗垂直和水平
第29题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. The man and woman shopped all over town. B. The woman bought some bookcases on sale. C. The woman went to many different stores. D. The man sold the woman some expensive bookcases. 参考答案:C 答案解析:[听力原文]
M: Did you find what you wanted You’ve been gone all afternoon.
W: I looked all over town,