消防过滤式自救呼吸器在整个防护时间内,透过过滤装置的一氧化碳浓度不大于()mL/m3。
A.200.0
B.300.0
C.400.0
D.350.0
参考答案:A
We should pay close attention to safety in schools because of frequent reports about accidents ____ students got injured or killed while in school.
A.which
B.for which
C.in which
D.what
患者被玻璃瓶炸伤右眼,检查见右角膜裂伤3mm,前房内大量出血,眼内其他结构看不清,下一步应()
A.眼B型超声波检查
B.X线摄片
C.前房穿刺放出积血
D.使用止血药,待出血吸收后进一步检查
E.间接眼底镜检查