根据《保护工业产权巴黎公约》的规定,下列哪些属于工业产权的保护对象?()
A.商标
B.厂商名称
C.货源标记或原产地名称
D.专利
参考答案:A, B, C, D
—I don't think maths is so _____ as physics, John.
—I agree with you. It is ____ than physics.[ ]
A. easy; less difficult
B. difficult; less easy
C. difficult; less difficult
D. more difficult; easier
大灯灯光调节