焊缝金属与未熔化的母材的交界处是（）。 ["熔合区","热影响区","焊缝金属区","正火区"]
《公路工程施工监理规范》5.1.11规定，监理工程师对已完工程实体质量的抽检频率应不低于施工单位自检频率的（）。 ["10％","20％","30％","40％"]
简述合理的领导结构。
你有一台运行Windows 7的计算机。多个用户登录到你的计算机。你在你计算机上的一个文件夹上启用了审核。你需要确保每次访问这个文件夹都记录到日志。你该怎么做？（） ["启动 Problem Steps Recorder","在事件查看其中，修改安全日志属性","在本地组策略中，配置审核对象访问","在本地组策略中，配置审核目录服务访问设置"]
You create a class library that contains the class hierarchy defined in the following code segment. （Line numbers are included for reference only.） You create an instance of the Group class. You populate the fields of the instance. When you attempt to serialize the instance by using the Serialize method of the XmlSerializer class， you receive InvalidOperationException. You also receive the following error message： "There was an error generating the XML document."You need to modify the code segment so that you can successfully serialize instances of the Group class by using the XmlSerializer class. You also need to ensure that the XML output contains an element for all public fields in the class hierarchy. What should you do？（） ["A","B","C","D"]
在Dreamweaver中，通常将放置在层内部的层称作（）或子层。
