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3． <em>A</em>端是固定端，梁<em>AB</em>的自重不计，试作出悬臂梁<em>AB</em>的受力图。（5分）
<img alt="" height="99" src="http://lms.ouchn.cn:80/api/uploads/169436/in-rich-contentcreated_at=1625673171" width="330">(单选题)
.<img alt="" height="136" src="http://lms.ouchn.cn:80/api/uploads/169427/in-rich-contentcreated_at=1625673171" width="355">
.<img alt="" height="123" src="http://lms.ouchn.cn:80/api/uploads/169428/in-rich-contentcreated_at=1625673171" width="280">
.<img alt="" height="138" src="http://lms.ouchn.cn:80/api/uploads/169429/in-rich-contentcreated_at=1625673171" width="343">
.<img alt="" height="114" src="http://lms.ouchn.cn:80/api/uploads/169430/in-rich-contentcreated_at=1625673171" width="324">

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出自：2024年国家开放大学答案

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