单项选择题

直井井眼是一个轴向和平面方向都很大的几何体，不能简化为平面力学模型。（）
A. 对

B. 错

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B、A written guarantee, issued to a purchaser of an article by its manufacturer, promising to repair or to replace it if necessary within a specified period of time.
C、A person who is an example of what not to do.
D、A person who gives a warranty.

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