正常人脑脊液压力的参考范围是()
A.80~180mmHg
B.80~180mmHg
C.100~200mmHg
D.100~220mmHg
E.50~150mmHg
参考答案:A
治疗中需杀灭细菌,使根尖呈无菌环境的疾病为()
A.根尖囊肿
B.根尖周肉芽肿
C.根尖周脓肿
D.牙周脓肿
E.以上都不是
After extinguishing a fire with CO2,it is advisable to().
A.use all CO2 available to cool the surrounding area
B.stand by with water or other agents
C.thoroughly ventilate the space of CO2
D.jettison all burning materials