A:to train properly
B:being trained properly
C:properly to trai
D:trained properly
The ship was ____ (lock) in the ice during the whole winter.
“苹果之父”乔布斯曾经说过:“根据大众的需要去设计成品是非常困难的。因为在大多数情况之下人们并不知道自己要的究竟是什么,所以你需要展示给他看。”这一观点体现了( )