A. 头皮电极 B. 皮下电极 C. 夹式电极 D. 鼻咽电极 E. 蝶骨电极
A. either all the way open or all the way closed B. normally open C. throttled depending on load D. controlled by suction pressure
A. 腹部压痛最显著的部位 B. 板状腹 C. 右下腹柔软无压痛 D. 腹胀肠鸣音消失 E. 腹式呼吸消失
A. 正确 B. 错误