下列哪种果树雌雄花器着生的年龄枝段相同（）
A、板栗
B、核桃
C、柿树
参考答案：A
著作权自作品创作完成之日起产生。( )
A．Our products cannot compete on the international market because of their higher prices.
B．Our products exhibit greater competitiveness even though they lack advanced technology.
C．Advanced technology will increase our expense to compete on the international market.
D． Advanced technology contributes to the excellence and competitiveness of our products.
