脚手架的外测、斜道和平台防护栏杆的搭设有什么要求?
参考答案:
应搭设两道防护栏杆,上杆离地1.05~1.2米,下杆离地0.5~0.6米,并设挡脚板或防护立网。
I didn’t know his address yesterday, otherwise I __________ him a visit.
A.would pay
B.would have paid
C.paid
D.had paid
印花是一种局部染色方式,其印花色数是成本的重要来源之一,选择适宜花色不必控制成本问题。