（）是职业道德的最终归宿和职业劳动者职业道德的最高境界。
参考答案：奉献社会
固体介质的应力状况对声速有一定的影响，一般应力增加，声速（）。
A、不变
B、增加
C、减小
D、折射后不变
As I grew up in a small village at the foot of a mountain, the visit to the village ______ scenes
of my childhood. [ ]
A. called up
B. called for
C. called on
D. called in
