【简答题】How did he make his way out in the end? ( )
【多选题】甲国人丽萨在甲国出版歌曲《春天之歌》后20天内,又在乙国出版了该作品,乙国是《保护文学和艺术作品伯尔尼公约》缔约国,甲国不是。依该公约,下列哪些选项是错误的?
A.
因《春天之歌》首先在非缔约国出版,不能在缔约国享受国民待遇
B.
丽萨在甲国出版《春天之歌》后20天内在乙国出版,仍然具有缔约国的作品国籍
C.
乙国依国民待遇为该作品提供的保护需要丽萨履行相应的手续
【简答题】从动件回程的速度大于工作行程速度的现象称为机构的 特性。
【简答题】三相异步电动机在额定电压和额定频率下运行时,若负载发生变化,则旋转磁场每极的磁通()。 (A) 基本保持不变 (B) 随负载增大而增大 (C) 随负载增大而减小 (D) 无法确定
【单选题】三相异步电动机在额定电压和额定频率下运行时,若负载发生变化,则旋转磁场的每极磁通将( )。
【单选题】How did the man solve his problem?
A.
He went to the administrator's office to ask the way.
B.
He just found the way accidentally.
C.
His girlfriend knew how to get there.
D.
A female student showed him because she was going the same way.
【简答题】How did Norman Cousins react, or respond, to his diagnosis?
【单选题】三相异步电动机在额定电压和额定频率下运行时,若负载发生变化,则旋转磁场每极的磁通( )。
【单选题】曲柄摇杆机构当主动件曲柄等速转动时,从动件摇杆空回行程的平均速度大于工作行程的平均速度,此性质称为四杆机构的
【简答题】How did the man feel about his work?