下列选项中属于我国专利权客体的是()
A、商标
B、发明
C、实用新型
D、外观设计
参考答案:B, C, D
_____ on April 47, 1968.[ ]
A. Man first walked on the moon
B. Dr. Martin Luther King was murdered
C. The World Trade Center was destroyed
D. Dr. James Naismith invented basketball
一_______! Someone is singing upstairs. It must be Maria.
—It can't be her.I saw her out. [ ]
A. Look
B. Say
C. Listen
D. Come