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题目内容
（2024年国家开放大学答案）
下图所示连续梁，欲使A端发生单位转动，需在A端施加的力矩（ ）
<img alt="" height="55" src="/api/uploads/2079143/in-rich-contentcreated_at=1649150474" width="189">(单选题)
.<img alt="" height="27" src="/api/uploads/2079144/in-rich-contentcreated_at=1649150474" width="43">=4<img alt="" height="20" src="/api/uploads/2079145/in-rich-contentcreated_at=1649150474" width="11">
.<img alt="" height="27" src="/api/uploads/2079146/in-rich-contentcreated_at=1649150474" width="43">=<img alt="" height="20" src="/api/uploads/2079147/in-rich-contentcreated_at=1649150474" width="11">
.<img alt="" height="27" src="/api/uploads/2079148/in-rich-contentcreated_at=1649150474" width="43">=3<img alt="" height="20" src="/api/uploads/2079149/in-rich-contentcreated_at=1649150474" width="11">
.<img alt="" height="27" src="/api/uploads/2079150/in-rich-contentcreated_at=1649150474" width="113">
<img alt="" height="55" src="/api/uploads/2079143/in-rich-contentcreated_at=1649150474" width="189">(单选题)
.<img alt="" height="27" src="/api/uploads/2079144/in-rich-contentcreated_at=1649150474" width="43">=4<img alt="" height="20" src="/api/uploads/2079145/in-rich-contentcreated_at=1649150474" width="11">
.<img alt="" height="27" src="/api/uploads/2079146/in-rich-contentcreated_at=1649150474" width="43">=<img alt="" height="20" src="/api/uploads/2079147/in-rich-contentcreated_at=1649150474" width="11">
.<img alt="" height="27" src="/api/uploads/2079148/in-rich-contentcreated_at=1649150474" width="43">=3<img alt="" height="20" src="/api/uploads/2079149/in-rich-contentcreated_at=1649150474" width="11">
.<img alt="" height="27" src="/api/uploads/2079150/in-rich-contentcreated_at=1649150474" width="113">
参考答案
