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“人力资本”这一概念，最早是由美国学者________提出的。

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关于我国经济制度的描述，下列说法正确的有（）。

A. 社会主义公有制是我国经济制度的基础
B. 社会主义公有制是我国经济制度的重要组成部分
C. 非公有制经济是我国社会主义市场经济的重要组成部分
D. 非公有制经济是我国经济制度的基础
E. “按劳分配为主，多种分配方式并存”是我国的分配制度

Bidirectional CommunicationBidirectional communication refers to a unique connection between parents and their children. The parents-child relationship can be described as a constant back and forth. Parents can influence children; children can also influence parents; they change each other. These bidirectional influences affect parent-child attachment over a lifetime. For example, when infants are born, they attach to their parents. However, parents’ baby talks and messages of love do as much to enhance their own attachment to the child as the child’s attachment to them.Question: The professor gives an experience to illustrate the definition of "bidirectional communication" between parents and their babies. Explain how this example is related to the reading passage.

导游人员在导游活动中未按规定时间到岗的，扣除2分。

A. 对
B. 错

印花税税目中，适用万分之三税率的有三个，分别是购销合同、建筑工程勘察设计合同和技术合同。( )

A. 对
B. 错