有关"验前概率"的叙述，正确的是（） A.临床医生对就诊者可能患何种疾病的初步印象的

如图箭头所示为上肢哪根神经（）

A.正中神经

B.桡神经

C.尺神经

D.肌皮神经

E.腋神经

肾上腺皮质腺癌的特点是（）

A．血皮质醇升高，ACTH降低，双侧肾上腺增生伴结节

B．血皮质醇升高，ACTH升高，双侧肾上腺皮质弥漫增生

C．血皮质醇升高，ACTH降低，血钾正常

D．血皮质醇升高，ACTH降低，伴明显低钾碱中毒

Passage Three

How do the militants justify their kidnapping of oil workers

A．They argue that oil resources in the Niger Delta region are exhausting.

B．They are not satisfied with the generous pay of the oil workers.

C．They claim that the Niger Delta region is off limit to foreign oil companies.

D．They see their action as protest against the uneven distribution of the oil wealth.

在临床麻醉中和ICU内下列哪项是必备的常规监测项目（）

A.脉搏血氧饱和度监测

B.氧浓度监测

C.CO₂浓度监测

D.动脉血气监测

E.氮气浓度监测

简述防火套管（阻火圈）的作用原理。