国家开放大学电大本科《土木工程力学》2020-2021期末试题及答案（试卷号：1129）
一、单项选择题（每小题3分，共30分。在所列备选项中，选1项正确的或最好的作为答案填入括弧）
试题答案及评分标准
（仅供参考）
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