Value foundation; teaching emotion; Interaction teaching; Study evaluation.

重视基础；教学情感；互动教学；学习评价。

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The first part: Seek and tell the value foundation of the system of the obligation.

第一部分：探寻告知义务制度之价值基础。

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The value foundation of educational policy consists of value principles and theoretical hypothesis.

教育政策的价值基础由一系列价值原则及其理论依据构成。

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Any buyer of Dow Jones knows that the foundation of value is the trust of readers in the brands and the journalism.

WSJ: A Report to Our Readers

Twitter is incredibly smart to systematically copy Instagram and rip out the foundation of value from that company and from Facebook over time.

FORBES: Why Twitter Is Right To Launch An Instagram Competitor

With the value of unlimited wireless services as the foundation of its business, Leap pioneered its Cricket service.

ENGADGET: Leap Wireless, T-Mobile strike deal to swap spectrum, pending FCC approval