After the former manager returned from abroad, our company ________ and the production doubled.[ ]

A. came to life    

B. came back life    

C. recovered to life    

D. returned to life

影响蛛网膜下腔阻滞平面调节的因素主要有（）。

A.穿刺部位及穿刺针斜口方向

B.病人体位和局麻药比重

C.病人的体重和身高

D.给药速度

E.局麻药的性能、剂量、浓度和容积