情感与人的社会性需要相联系,属于高级心理现象。
参考答案:对
His daughter is a famous singer, _____ always makes him very proud. [ ]
A. that
B. which
C. who
D. what
一块黑板擦放在水平的讲台上处于静止状态。下列各对力中属于平衡力的是 ( )
A.讲台受到的重力和黑板擦对讲台的压力
B.黑板擦受到的重力和黑板擦对讲台的压力
C.黑板擦对讲台的压力和讲台对黑板擦的支持力
D.黑板擦受到的重力和讲台对黑板擦的支持力