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立柱式，多采用回转型、俯仰型或屈伸型的运动型式，一般臂部都可在水平面内回转，具有占地面积小而工作范围大的特点。（） A. 对 B. 错

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A: Glad to meet you, Jack. Here is my cards. B:________________________ A.
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A．draw
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