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如图所示,LC回路中C是一平行板电容器,两板水平放置,开关断开时,电容器内带电灰尘恰好静止,当开关S闭合后,灰尘在电容器内运动,若C=4μF,L=0.1mH,求: (1)从S闭合时开始计时,
百度试题 题目要求氧浓度达到45%时,应为病人调节氧流量为 A.2LB.4LC.6LD.8LE.10L 相关知识点: 试题来源: 解析 C 氧浓度和氧流量的换算法可用公式:吸氧浓度(%)=21+4×氧流量。