安装工程脚手架为什么采用系数方法计取搭拆及摊销费?
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A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion, they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself. What design issue has the team discovered?()
A. Tight coupling
B. Low cohesion
C. High cohesion
D. Loose coupling
E. Weak encapsulation
F. Strong encapsulatio
在牵引其它故障车辆时,须选择好合理的钢索和保持安全的车距,并且故障车上必须有可靠的制动、转向、停车装置和操作人员,牵引距离不应过长。
A. 正确
B. 错误
预先危险性分析是在一个工程项目的设计、施工和投产之前,对系统存在的危险性类别、出现条件、导致事故的后果等做出概略的分析。这种分析方法将系统的危险和危害划分为()个等级.
A. 4
B. 5
C. 6
D. 7