单项选择题
A.10% B.15% C.20% D.25% E.30%
A.9% B.12% C.15% D.18% E.21%
A.口服止痛药 B.全身麻醉 C.神经阻滞 D.良好制动 E.吸氧
A.11%~12% B.3%~4% C.5%~6% D.7%~8% E.9%~10%
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