正常成人PR间期为()
A.0.10~0.20秒
B.0.12~0.20秒
C.0.06~0.08秒
D.0.32~0.44秒
E.0.08~0.22秒
参考答案:B
Man: Excuse me, I was told I could find Dr. Adkins here. Woman: And you have. Question: What does the woman mean()。
A. She’s Dr. Adkins.
B. She has to find the doctor.
C. The doctor has been expecting the man.
D. The doctor will be with the man shortly.
传统的知识产权保护的对象,主要包括()。
A.专利权
B.商标权
C.著作权
D.以上都是