You are developing a page named Products.aspx in a Web application that contains three DropDownList controls that are dynamically loaded from a SQL Server 2005 database file. The DropDownList controls represent a vendor list, a certification list, and an exam list. Certkiller .com customers use the Products.aspx page to select exams related to particular certifications on offer from a particular vendor. A Go button initiates the selection. Each DropDownList control has an associated RequiredFieldValidator control.Whenever the customer selects a vendor, and the vendor offers certifications, then the customer must also select a certification if the. If the vendor only offers exams and not certifications, the certification list should remain hidden. Whenever the customer selects a certification, the customer must also select an exam. Validation error messages should only be displayed when the Go button is clicked. You need to set properties on the vendor DropDownList control. What should you do?（） Set the AutoPostBack property to True and the CausesValidation property to False.。 Set the AutoPostBack property to False and the CausesValidation property to True.。 Set the AutoPostBack property to True and the CausesValidation property to True.。 Set the AutoPostBack property to False and the CausesValidation property to False.。
事故树是安全系统工程中的重要的工具之一，它是从（）到（）描绘事故发生的有向逻辑树。 结果、原因。 原因、结果。 初始、最终。 下、上。
You are a help desk technician for your company. All employees use Windows XP Professional computers. A salesperson named Philippe receives a removable disk drive cartridge from his supervisor. Philippe now reports that he cannot edit files on the cartridge. When he tries to open any files or folders on the cartridge, he receives an “access denied” error message. Philippe’s supervisor is currently out of the office. You place the cartridge in the removable drive on your computer. You receive the same “access denied” error message when you try to access the files and folders. You call Philippe’s supervisor. She asks you to grant permission to access the contents of the cartridge only to Philippe. However, she also wants to prevent Philippe from changing permissions on the contents of the cartridge. Which two actions should you take?（） As Administrator, take ownership of the files and folders. 。 As Administrator, grant your help desk user account Allow - Full Control permission on the files and folders.。 Grant Philippe Allow - Modify permission on the files and folders.。 Grant Philippe Allow - Full Control permission on the files and folders.。 Grant Philippe Allow - Take Ownership permission on the files and folders.&e。
某城市环路立交桥工程长1.5km，其中跨越主干道路部分采用现浇预应力砼箱梁结构，跨径47.6m，鉴于在城市主干道上施工，承建该工程的施工项目部为此制订了专项施工方案，拟采取以下措施：1）占用一条慢行车道，选择在夜间时段，自行封路后进行箱梁支架作业。2）在实施遇到下列一些情况：①施工单位根据预制梁的尺寸、数量、工期确定预制台座的数量、尺寸、对张拉机具作了校验，并对预应力的张拉、灌浆等施工工艺进行了控制。②跨越既有道路部分为现浇梁施工，采用支撑间距较大的门洞支架，为此编制了专项施工方案，并对支架强度作了验算。对张拉机具的使用有哪些要求？
健康自我意识的可以从自我认知、（）和自我控制三个层次来培养。 自我超越。 自我关怀。 自我体验。 自我批评。
下面关于位图图像和矢量图形描述错误的是（）
