进行心电监护前须清洁局部皮肤,适宜的溶液是()
A.乙醇
B.生理盐水
C.乙醇-乙醚混合液
D.蒸馏水
E.自来水
参考答案:C
— Did you enjoy yourself at the party?
— Yes. I've never been to _____ one before. [ ]
A. a more excited
B. the most excited
C. a more exciting
D. the most exciting
在B-ISDN协议参考模型中,包括4个功能层,分别为物理层()。