脉状钨矿的“五层楼”垂直分布规律
模板文件的扩展名是（） [" css"," dwt"," dll"," htm"]
在通货膨胀时，适当地储存原材料存货可以（）。 ["防止停工待料","获得市场物价上涨的好处","降低进货成本","维持均衡生产"]
You are developing an application to create a new file on the local file system.You need to define specific security settings for the file. You must deny the file inheritance of any default security settings during creation.What should you do？（） ["Create the file by using a new FileStream object by passing the FileSecurity object as a parameter to the FileStream constructor.","Create a new FileSecurity object.","Apply the permissions by using the File class.","Create a new FileSystem Access Rule object for each permission that you need，and add each rule to the FileSecurity object.","Create a new FileSystem Audit Rule object and add it to the FileSecurity object."]
安全生产“三违”指什么？
产生水头损失的根源是什么？
