下列非处方药的专有标识是
A．OTC
B．CTO
C．GCP
D．GSP
E．GAP
参考答案：A
— Nice to meet you.
— _____. [ ]
A. Oh , yes.
B. Are you njce to meet me?
C. Nice to meet you,too.
D. It's good.
哪些情况下应采用两面焊法？
