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單項選擇題

氣體絕熱節(jié)流的特征有哪些？

A、等焓
B、壓力降低
C、熵增
D、溫度不變

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單項選擇題

室外機搬動時頃斜角度不應大于（）°

A.30
B．45
C．60

單項選擇題

A primary purpose of the audit working paper is to

A、Aid the auditors by providing a list of required procedures
B、Provide a point of reference for future audit engagements
C、support the underlying concepts included in the preparation of the basic financial statements
D、support the auditors" opinion

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