[简答题]A modern manufacturing ( 生产) system is surely high tech. High tech became a popular expression in the United states during the early 1980’s. (Passage 3 )
第13题: [单项选择]休克时主要的代谢改变是() A. 酸中毒,高血钾 B. 碱中毒、低血钾 C. 低镁血症、低渗性脱水 D. 低血钙、低血糖 E. 成人呼吸窘迫综合征 参考答案:A 答案解析:休克时组织灌注不足,细胞缺氧,机体进行无氧代谢,产生大量的乳酸,导致代谢性酸中毒;由于H+浓度增高,细胞内外H+-K+交换增加,H从细