组合机床自动线,在空负荷运转试验时,应连续运转()小时。 ["1","2","3","4"]
下列哪项最符合心力衰竭的概念() ["心脏每搏输出量降低","静脉回流量超过心排血量","心功能障碍引起大小循环充血","心脏负荷过度引起心功能障碍","心排血量不能满足机体的需要"]
男性患者,27岁。因反复鼻出血,发热5天前来就诊。血常规:WBC3.0×109/L,RBC2.5×1012/L.PLT68×109/L。骨髓:增生明显活跃,原始细胞+幼稚细胞>80%,多数细胞胞浆中含有Auer小体。
该患者的诊断是() ["急性髓细胞白血病","慢性粒细胞白血病","急性淋巴细胞白血病","巨幼细胞性贫血","再生障碍性贫血"]
非城镇户籍人口教育免学费年限达到()年,随迁子女平等接受义务教育比例超过90%。 ["A.12 ","B.11 ","C.10 ","D.14"]
烃源层的最佳单层厚度是()。 ["5-15m","15-25m","30-50m",">200m"]
竖炉一天作业时间为24小时,某日因故障停机19时50分,求日历作业率是多少?(19时50分=19.83时)