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The value to instill historical knowledge in American social studies for children lies in that it helps children understand the development, change and association of different things.

在美国儿童社会领域教育中，融入历史学科知识的价值在于帮助儿童了解事物的发展性、变化性和联系性；

youdao

Therefore, the paper select the four core cities as case studies, and discuss the social and economic development of four core cities in northeast.

因此，本文选择东北四大核心城市为研究个案，对其社会经济集聚情况进行分析。

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Several studies have revealed significant differences in psycho-social development between children whose mothers had participated in MOCEP and those who had not.

UNESCO: Family Literacy Programmes (FLPs)

Evaluation studies have demonstrated that MOCEP has been critical in fostering optimal child psycho-social development, as well as child and adult literacy.

UNESCO: Family Literacy Programmes (FLPs)