二氧化氯对微生物的杀菌机理一般认为:()对细菌壁有吸附和诱过性能
A.CLO2
B.HOCL
C,OCL-
D.CL-
参考答案:A
----- Why did you come by taxi?
-----My bile broke down last night and I ____it repaired.
A.didn’t have
B.don’t have
C.haven’t had
D.won’t have
成人心肺复苏时胸外按压的深度为()。
A.胸廓前后径的一半
B.2-3cm
C.4-5cm
D.6-7cm