The main factor which determines the output of each cylinder is ()
A. the cylinder weight
B. the cylinder bore
C. the cylinder length
D. the cylinder cover
为保护易感染人群所用各种免疫措施中最重要的是()
A. 转移因子
B. 丙种球蛋白
C. 高价免疫球蛋白
D. 减毒活疫苗或灭活疫苗
E. 中药预防
通常血气分析仪中毛细管pH玻璃电极的pH测定范围是()
A. 0~1
B. 1~3
C. 0~7
D. 7.35~7.45
E. 0~10