桥式起重机支撑中心线之间的水平距离为起重机的跨度。单位为米。
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With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to ().
A. allow filtration of less viscous oil
B. decrease the pressure drop across the filter
C. improve overall filtration
D. all of the above
由于岩体变形而对支护或衬砌的压力,称为变形压力;将由于岩体而对支护或衬砌的压力,称为()。
中介目标和操作目标的选取一般要满足相关性、可测性、可控性、抗干扰性和互补性的基本原则。()
A. 正确
B. 错误
藤本天竺葵又名盾叶天竺葵、常春天竺葵,多年生草本,枝条蔓生,茎长45cm以上,最佳的用途为()。
A. 花坛花卉
B. 花境花卉
C. 切花花卉
D. 窗台、阳台花卉