关于商标叙述错误的是（）
A.标明注册商标就有效
B.标明注册标志就有效
C.标明就有效
D.有商标就有效
E.商标有无注册标志
参考答案：D
Much to the government's disappointment, this year has ____ a big increase in road accidents. [ ]
A. told
B. seen
C. said
D. watched
战国七雄
就有效
就有效