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[单选题]
正确缓解心理压力的方法主要有()
A.倾诉、哭泣
B.放松法
C.改变自己的行为
D.打架
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第4题
A、Acknowledgement is usually after the References.
B、As to the number of key words, there should be at least 2 and at most 8.
C、Keywords are the most important words and phrases representing the theme or subject matter of the paper.
D、Financial help, technical or instrumental help,conceptual ,editorial assistance and moral help are included in acknowledgement.
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