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菠萝切片机有两个送料螺旋，其螺距、旋向、转动方向应如何？印痕要求？

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汽车空调机中，能进行干燥吸湿处理，并能滤掉杂质的是（）。

A. 储液-干燥器
B. 冷凝器
C. 蒸发器
D. 制冷器

You create a Web Form with several UI elements on it. During a code review, you realize that some of the UI elements can be grouped into user controls. You need to create a Web control to group the UI elements that do not require server-side processing. Doing so will enable you to programmatically add or remove the UI elements from the page. You want to maintain the UI elements' style properties. What should you do? （）

A. Use System.Web.UTemplateControl to group the UI elements.
B. Use System.Web.UHtmlControls.HtmlControl to group the UI elements.
C. Use System.Web.ULiteralControl to group the UI elements.
D. Use System.Web.UWebControls.Literal to group the UI elements.

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轻微满水

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企业新职工上岗前必须经过什么教育？

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