并联电路的各支路对总电流有分流作用。
参考答案：对
—Michael has a temperature, so he isn’t able to come.
—____
A. I’m sorry to hear that. B. Take it easy. C. Good luck.
肥胖患者的麻醉前准备，下列哪些是必须的()
A．大号面罩
B．纤维喉镜
C．口咽通气导管
D．氧气
E．脉搏血氧饱和仪
