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重复载荷是()、()反复变化或()都反复变化的载荷。
提速道岔设置DBQ的目的是为了保护电机。
桥梁上、隧道内、道口两侧严禁存放什么路料?
我国工程标准体系纵向分为三个层次:基础标准、通用标准、()。
建立Im=∫(1/cosmx)dx的递推公式。
旅游者希望购买古玩或仿古艺术品时,导游人员应带其到( )购买。
棉织工作服、帽子、口罩等纺织品一般放入专用的污物袋中,用70℃以上的热水加洗涤剂洗涤。有明显污染时,随时喷洒消毒剂消毒或放入专用的污物袋中,121℃,15分钟高压灭菌处理。
在铸铁上攻丝,可采用()作切削液。
患者,女性,60岁,反复右髋关节疼痛3个月余,体检右髋关节压痛明显,临床上怀疑股骨头缺血坏死。下列检查方法中对于股骨头缺血坏死诊断最早期、最敏感的影像学方法为()
贫血定义是指单位容积血液内()。
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