When the young adults are learning how to give and receive affection in the adult world, they should learn how to relate to ______.
A. their peers
B. their parents
C. children and young adolescents
D. their relatives
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【单选题】下面属于曲面立体的是( )。
A. 棱柱
B. 棱锥
C. 圆柱
【单选题】下面属于曲面立体的是( )。
A. 棱柱
B. 棱锥
C. 圆锥
【单选题】下面属于平面立体的是( )。
A. 圆锥
B. 棱柱
C. 圆柱
【单选题】下面属于平面立体的是( )。
A. 球
B. 棱锥
C. 圆柱