一件衬衫d元，一件毛衣的价格比它的3倍少9元，毛衣的价格是______．
d×3-9，
=3d-9（元），
答：毛衣的价格是3d-9元，
故答案为：3d-9．
Film has a much shorter history, especially when_ such art forms as music and painting.
A．having compared to
B．comparing to
C．compare to
D．compared to
《巴黎公约》的优先权原则
