[单选] You create a Web Form that allows users to create a new account. You add a CreateUserWizard control by using the following code segment. You need to ensure that the wizard automatically sends an e-mail message to users when they finish creating their accounts. You add a valid element to the Web.config file. Which code segment should you add to the Page_Load event? （）

人身保险合同的特征？ 甲公司是一家有机蔬菜生产商，通过分析绿色蔬菜生产商对有机蔬菜产业盈利能力的影响，认为绿色蔬菜生产商的影响力主要是波特五种竞争力模型中所提及的（）。 购买者的议价能力。 潜在进入者的威胁。 替代产品的威胁。 供应者的议价能力。 简述团体对个体的作用。 You have a self-hosted Windows Communication Foundation (WCF) service. You need to configure the service to provide an X509 certificate during authentication. What should you use to configure the service?（） the Certificate property of the X509 Certificate lnitiator Service Credential class。 the SetCertificate method of the X509 Certificate Initiator Service Credential class。 the SetCertificate method of the X509 Certificate Recipient Service Credential class。 the TrustedStoreLocation property of the X509 Certificate Recipient Service Credential cla。 简述在计算机中为什么常采用补码表示。 You create a Web Form that allows users to create a new account. You add a CreateUserWizard control by using the following code segment. You need to ensure that the wizard automatically sends an e-mail message to users when they finish creating their accounts. You add a valid element to the Web.config file. Which code segment should you add to the Page_Load event? （）