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____是施工企业内部控制各项成本支出、考核用工、“两算”对比、签发施工任务单、限额领料、基层进行经济核亥算的依据。
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技术准备是施工准备工作的核心。（）
The notion of a language is not monolithic and there really exist many types or varieties of the same language. Some language variations result from the language user, that is , his or her geographical origin (__________), or his or her social condition (__________). However, some language variations result from the circumstances of communication, such as __________ and Ligua Franca , taboo and __________ as well as__________.
下列关于西方科学教育源头说法正确的是：
关于19世纪上半叶西方科学教育的说法，正确的是：
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