工程项目策划的最终目的是为项目建设的决策和实施()。
A. 提供依据
B. 确定基准
C. 增值
D. 确定项目范围
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为了防止触电,可以采取绝缘、防护、隔离等技术措施以保证安全。
A. 正确
B. 错误
Which of the following a true statements regarding the use of VLANs to segment anetwork? ()
A. They increase the size of collision domains
B. They allow logical grouping of users by function.
C. They can enhance network security.
D. They increase the size of the broadcast domain while decreasing the number of collision domains.
E. They increase the number of broadcast domains while decreasing the size of the broadcast domains.
F. They simplify switch administration.
对总体不进行任何加工,直接进行随机抽样、获取样本的方法,称为()。
A. 系统抽样
B. 完全随机抽样
C. 多级抽样
D. 整群抽样