声频在20Hz以上称之为 ( )。
A.次声
B.可闻声
C.超声
D.X线
E.多普勒频移
参考答案:C
We should not be made to ______ the basic principle, namely, the need and desire of the adolescent to engage responsibility in the real pursuit of life and then to learn through responsibility.
A.lose sight of
B.lose track of
C.become blind of
D.give way to
麦克勒兰德的理论的需求集中在哪三个需要?()
A.成就、关系,和权力
B.成就、权力和归属
C.权力、成就和尊重
D.归属、控制和关系
E.控制、尊重和关系