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You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList. The number of items of the data-bound collection is fixed. However, users can modify the properties of each of the Product objects in the collection. You need to ensure that changes made on the Product objects are automatically reflected in the ListBox control. What should you do?()
预防人感染禽流感,正确的措施有()
感染性食物中毒的特点是()
保证电梯安全使用,防止一切危及人身安全的事故发生的系统称为()系统。
下列关于核苷酸的叙述正确的是()
铠装与屏蔽层应可靠接地,钢铠两点接地,至控制室的控制电缆屏蔽层两点接地。
某设备年租赁费为30万元,若购买该设备,其购买费用年值为20万元,贷款利息每年支付5万元,设备折旧费用为15万元,所得税率为25%,那么用净年值表示的设备租赁与设备购买费用之差为()万元。
以下关于混凝土强度的叙述,哪一项是错误的()?
计算机补丁可以用来()
SFC型扣件弹条扣压状态,每半年检查1遍,每公里连续抽查()个。
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