全身麻醉的分期和各期不同体征是谁首先提出的()
A.Lundy
B.WesleyBourne
C.Guedel
D.Magill
E.JohnSnow
参考答案:C
I will have a ______. It must be great fun.[ ]
A. 7 days holiday
B. 7-days-holiday
C. 7-day-holiday
D. 7-days-holidays
酸洗过程中应采取哪些安全措施?