您正在开发.NET Framework2.0应用程序用于存储类型安全列表中的姓名和电子邮件地址。列表中将填充所有在那些从排序的数据，这意味着您不总是需要执行插入或删除对数据的操作。您需要选择一种数据结构，优化内存使用，并且具有良好的性能。你应该做什么？（） ["应使用 System.Collections.Generic.SortedList 类","应使用 System.Collections.HashTable 类","应使用 System.Collections.Generic.SortedDictionary 类","应使用 System.Collections.SortedList 类"]
何谓叶片操作系统？
膨化原理。
You work as an application developer at CER-Tech.com. Cert-Tech.com uses Visual studio.NET 2005 as its Application Development platform.You are developing a .NET Framework 2.0 application used to store a type-safe list of names and e-mail addresses. The list will be populated all at ones from the sorted data which means you will not always need to perform insertion or deletion operations on the data. You are required to choose a data structure that optimizes memory use and has good performance.What should you do？（） [" The System.Collections.Generic.SortedList class should be used "," The System.Collections.HashTable class should be used"," The System.Collections.Generic.SortedDictionary class should be used "," The System.Collections.SortedList class should be used"]
You create a Web page that contains the following code. You need to provide the following implementation. Each time the AddFile button is clicked， a new div element is created. The new div element is appended after the other file upload div elements and before the AddFile span. Each new element has a unique identifier. Which code segment should you use？（） ["$（"#AddFile"）.click（function （） {var id = "File" + ++lastId； var item =$（".File：first"）.clone（true）； $（"input：file"， item）.attr（{ id： id， name： id }）； item.insertBefore（"#AddFile"）； }）；","$（"#AddFile"）.click（function （） {var id = "File" + ++lastId；$（".File：first"）.clone（true）.attr（{ id： id， name： id }）.insertBefore（"#AddFile"）； }）；","$（"#AddFile"）.click（function （） {var id = "File" + ++lastId； }）；","$（"#AddFile"）.click（function （） {var id = "File" + ++lastId；var item = $（".File：first"）.clone（true）； $（"input：file"， item）.attr（{ id： id， name： id }）； item.insertAfter（"input[type=file]"）； }）；"]
变额人寿保险的特征？
