脑脊液每小时分泌量约() ["10ml","5ml","15ml","20ml","25ml"]
亚急性脑积水是指() ["3天内","1个月内","2周内","1周内","半年以上"]
新生儿水平侧卧位腰穿测压,其正常值范围为() ["40~100mmH2O","70~180mmH2O","10~14mmH2O","100~200mmH2O","70~120mmH2O"]
在消除静电危害时采取增湿措施和采用抗静电添加剂,促使静电电荷从绝缘体上自行消散,这种方法称为()。 ["A、接地法","B、中和法","C、泄漏法"]
下列()两种是电气操作中使用的基本安全用具。 ["A、绝缘手套、验电器","B、绝缘鞋、绝缘站台","C、验电器、绝缘夹钳"]
机车撒砂装置的作用是防止(),便于发挥()。