搜题请搜索小程序“爱下问搜题”
问题 单项选择题

撤销注册商标，其商标专用权视为（　）。

A．从撤销之日起不存在

B．仍然存在

C．自始不存在

D．过一段时间之后自行消失

答案

参考答案：C

解析：撤销注册商标，其商标专用权视为自始不存在。

填空题

已知x+y+z=0，x2+y2+z2=1，则x（y+z）+y（x+z）+z（x+y）的值为______．
查看答案
选择题

Not until about 2000 BC________________________done.

A．were known of the oldest paintings

B．the oldest of known paintings were

C．the oldest known were painting

D．were the oldest known paintings
查看答案