计算直接支承小楞结构构件时，均布活荷载的标准值为( )。
A. 1.4kN/m2
B. 1.5kN/m2
C. 1.6kN/m2
D. 1.8kN/m2
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承重的满堂红脚手架，立杆的纵、横向间距不得大于( )，纵向水平杆(顺水杆)每步间距离不得大于( )。
A. 1.3m，1.5m
B. 1.5m，1.4m
C. 2.0m，1.7m
D. 1.2m，1.6m
钢结构涂装工程中，因操作不小心，涂料溅到皮肤上时，正确的处理措施为( )。
A. 用汽油擦洗
B. 用强盐酸擦洗
C. 用木屑加肥皂水擦洗
D. 用大量水冲洗
When the author refers to professions as no longer being "closed guilds", he means that______.
A. it is much easier to become a professional today than it was in the past
B. there is more social intercourse between professionals and others
C. popular science has told their secrets to the world
D. anyone can now understand anything in a profession
脚手架架体外侧必须用密目式安全网封闭，网体与操作层不应有大于( )的缝隙，网间不应有( )的缝隙。
A. 10mm，25mm
B. 8mm，15mm
C. 9mm，20mm
D. 10mm，20mm
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