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[填空题] 高压加热器投运,应先()水电动门,后()水电动门。

白血病骨关节改变的X线表现包括() ["骨质疏松","弥漫性斑点状、虫蚀样骨质破坏","骨皮质糜烂、变薄","骨膜反应及软组织肿胀","白血病带"] 下列哪一项是右心衰竭和肝硬化主要鉴别点() ["肝大","浮肿","腹水","颈静脉怒张,肝颈回流征(+)","黄疸"] 导致牙体缺损的最常见原因是() ["磨损或磨耗","外伤","酸蚀症","龋病","楔状缺损"] 急性心肌梗死早期最重要的治疗措施是() ["抗心绞痛","消除心律失常","补充血量","心肌再灌注","增加心肌营养"] 脊椎退行性变的病理改变中,包括哪项() ["椎间盘退行性变","椎间关节退行性变","韧带退行性变","脊椎骨骼改变","脊椎结核、肿瘤病变"] 高压加热器投运,应先()水电动门,后()水电动门。
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