以下哪一个机构是我国的著作权行政管理部门()
A.各级新闻出版局
B.各级版权局
C.各级文化局
D.各级知识产权局
参考答案:B
()refers to the tendency of a body of the ship to return to its original position after it is displaced therefrom.
A.Stability
B.Responsibility
C.Liability
D.Visibility
骨质疏松症可分为原发性和继发性两类()