第一代柴油机电控燃油喷射系统也称位置控制系统，它用电子伺服机构代替（）实现供油量的调整。 ["调速器控制供油滑套位置","油量和定时的调节","共轨压力和喷油压力／时间的综合控制"]
特种设备作业人员应当按照国家有关规定经（）考核合格，取得特种设备作业人员证书，方可从事相应的作业或者管理工作。 ["上级部门","人事部门","劳动部门","特种设备安全监督管理部门"]
建筑业企业信用档案包括（） ["A.企业基本情况、资质 ","B.工程质量 ","C.合同履约 ","D.企业人员信用 ","E.社会投诉与违法行为"]
You use Microsoft .NET Framework 4 to create a Windows Forms application. You add a new class named Customer to the application. You select the Customer class to create a new object data source. You add the following components to a Windows Form: A BindingSource component named customerBindingSource that is data-bound to the Customer object data source. A set of TextBox controls to display and edit the Customer object properties. Each TextBox control is data-bound to a property of the customerBindingSource component. An ErrorProvider component named errorProvider that validates the input values for each TextBox control. You need to ensure that the input data for each TextBox control is automatically validated by using the ErrorProvider component. Which two actions should you perform?（） [" Implement the validation rules inside the Validating event handler of each TextBox control by throwing an exception when the value is invalid."," Implement the validation rules inside the TextChanged event handler of each TextBox control by throwing an exception when the value is invalid."," Implement the validation rules inside the setter of each property of the Customer class by throwing an exception when the value is invalid."," Add the following code segment to the InitializeComponent method of the Windows Form. this.errorProvider.DataSource = this.customerBindingSource;"," Add the following code segment to the InitializeComponent method of the Windows Form. this.errorProvider.DataSource = this.customerBindingSource.DataSource; this.errorProvider.DataMember = this.customerBindingSource.DataMember"]
建立施工安全管理制度体系原则之一是贯彻"安全第一，预防为主"的方针，企业必须建立健全（），确保工程施工劳动者的人身和财产安全。 ["安全生产责任制","岗位责任制","群防群治制度","项目经理负责制","作业人员持证上岗"]
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