You create a Web page that contains the following code. You need to ensure that when the user clicks an item in the list， the text color of the "Welcome!" message will change. Which declaration should you use？（） ["<ul id="color"> <li onclick="changeColor(this.innerText);">Black<\/li> <li onclick="changeColor(this.innerText);">Red<\/li> <\/ul> ","<ul id="color"> <li onclick="changeColor(this.style.color);">Black<\/li> <li onclick="changeColor(this.style.color);">Red<\/li> <\/ul> ","<ul id="color"> <li><a onfocus="changeColor(this.innerText);">Red<\/a><\/li> <li><a onfocus="changeColor(this.innerText);">Black<\/a><\/li> <\/ul> ","<ul id="color"> <li><a onfocus="changeColor(this.innerText);">Red<\/a><\/li> <li><a onfocus="changeColor(this.innerText);">Black<\/a><\/li> <\/ul>"]
下列各项中，属于加剧产业竞争的主要因素有（）。 ["竞争对手时常更换","产业已进入成熟期","产业进入障碍低而退出障碍高","企业拥有稀缺资源"]
You create a Web site that is for members only. The Web site allows members to create lists of users that have access to information about member profiles. The name of the list is stored in the listName variable. The user name of the user to whom access is given is stored in the username variable. You need to enable members to manage their lists of users. Which code segment should you use? （） [" Roles.CreateRole(listName);User.InInRole(listName);"," Roles.CreateRole(listName);Roles.AddUserToRole(useName, listName);"," Roles.RoleExists(listName);Roles.AddUserToRole(useName, listName);"," Roles.RoleExists(listName);User.InInRole(listName)"]
You are developing an application that uses role-based security. The prinicipal policy of the application domain is configured during startup with the following code：AppDomain.CurrentDomain.SetPrincipalPolicy（PrincipalPolicy.WindowsPrincipal）； You need to restrict access to one of the methods in your application so that only members of the local Administrators group can call the method. Which attribute should you place on the method？（） [" [PrincipalPermission （SecurityAction.Demand， Name = @"BUILTIN\\Administrators"）]"," [PrincipalPermission （SecurityAction.Demand， Role = @"BUILTIN\\Administrators"）]"," [PrincipalPermission （SecurityAction.Assert， Name = @"BUILTIN\\Administrators"）]"," [PrincipalPermission （SecurityAction.Assert， Role = @"BUILTIN\\Administrators"）]"]
扩大基层民主，是我国发展社会主义民主政治的重要内容。下列属于基层自治组织的是（）。 ["居民委员会","村党支部委员会","乡镇人民代表大会","业主委员会"]
简要说明什么是信息系统，其典型的数据处理有哪些？
