进行系统隔离时,氢气、瓦斯及油等易燃、易爆或可能引起人员中毒的系统检修,应关闭有关截门后立即在法兰上加装(),并保证严密不漏。
参考答案:堵板;盲板
Which of the following is not a contributory factor to thermoregulation in the preterm neonate
A. Immature central nervous system (CNS).B. Large skin surface area.C. Lack of subcutaneous (S. C. ) and brown fat.D. Tendency toward capillary fragility.
历史研究法的目的在于( )
A.解决政府行政管理的现状及其演变趋向B.鉴别优劣、取长补短C.发现行政管理的真正意义D.了解自己的优点和缺点