纵向钢筋配筋率过小时,纵筋对柱的承载力影响很小,接近于素混凝土柱,纵筋将起不到防止( )的缓冲作用。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧