皮皮学，免费搜题
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搜题
【多选题】
You are creating a custom user control. The custom user control will be used on 10 Web Forms for an ASP.NET Web site that allows users to register and log on to a personalized experience. The custom user control uses two TextBox controls and two Button controls. You need to ensure that the controls are visible only when users are not logged on to the Web site. You also need to minimize the amount of effort in development and maintenance for the Web site. Which two actions should you perform? （）A.
Add the OnClick event handler for the Login button to the code used in the custom user control.
B.
Add the OnClick event handler for the Login button to the code used in the Web Form where the control is added.
C.
In the Page_Load method of the Web Form, add a code segment to set the visibility of the TextBox and Button controls where the control is added.
D.
In the Page_Load method of the custom user control, add a code segment to set the visibility of the TextBox and Button controls.
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皮皮学刷刷变学霸
举一反三
【单选题】对哈弗斯系统（骨单位）的描述，哪一项错误。
A.
长骨骨干主要有大量的哈弗斯系统（骨单位）构成
B.
介于内外环骨板之间
C.
哈弗斯骨板以哈弗斯管为中心呈呈同心圆排列，又称骨单位
D.
哈弗斯管又称中央管，内有血管和神经
E.
由不规则平行骨板构成
【简答题】离职后福利，是指企业为获得职工提供的服务而在职工退休或与企业解除劳动关系后提供的各种形式的报酬和福利，包括短期薪酬和辞退福利。（ ）