回送机车乘务员的配置及出、退勤有何规定？

反映休克病人组织灌流量最简单而有效的指标是（）

A.血压

B.脉搏

C.尿量

D.皮肤色泽

E.中心静脉压

Great changes___ have taken place _____ in the city, and a lot of factories________.

A．have been taken place; have been set up

B．have taken place; have been set up

C．have taken place; have set up

D．were taken place; were set up

水液运行的通道是（）

A.经脉

B.络脉

C.腠理

D.三焦

E.气门

符合亚急性重型病毒性肝炎的描述是()

A．可由急性重型肝炎转化而来

B．可由急性肝炎恶化而来

C．肝脏体积缩小

D．肝细胞亚大片坏死

E．肝细胞结节状再生

下钻至东营组以下地层遇阻，划眼应注意哪些事项？