距焊接点()范围内严禁存放易燃易爆物品。 ["5m","8m","10m","6m"]
在材料相同条件下,随着柔度的增大:() ["细长杆的临界应力是减小的,中长杆不是","中长杆的临界应力是减小的,细长杆不是","细长杆和中长杆临界应力均是减小的","细长杆和中长杆的临界应力均不是减小的"]
缺氧、酸中毒引起DIC的主要机制是() ["血管内皮细胞损伤启动凝血系统","组织因子释放入血启动凝血系统","红细胞大量破坏","血小板聚集增强","促凝物质入血"]
异型输血引起DIC的主要机制是() ["血管内皮细胞损伤启动凝血系统","组织因子释放入血启动凝血系统","红细胞大量破坏","血小板聚集增强","促凝物质入血"]
下列关于气管和主支气管错误的描述是() ["气管位于食管前方","气管于胸骨角平面分为左、右主支气管","全程分为三段","右主支气管比左侧粗短","颈段气管较胸段的长"]
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