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合理的喷嘴结构应使氧气流股的（）最大限度的转换成（）。

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在以下因素中，最不可能使投资水平下降的是哪一项因素（）

A. 储蓄率降低
B. 联邦预算盈余
C. 资本收益税率上涨

You are the administrator of a Windows Server 2003 computer named Server1. User profiles are stored on Server1. A user named Peter reports that he accidentally deleted a folder named WorkProduct from his user profile. He needs to have his WorkProduct folder restored. Other users are accessing Server1, and you do not want to negatively affect their work. You locate the latest backup that contains the files that you need to restore. You need to restore Peter’s WorkProduct folder. You want to achieve this goal by using the minimum amount of administrative effort. What should you do? （）

A. Restore Peter's WorkProduct folder, and clear the Restore junction points, but not the folders and the file data they reference check box.
B. Restore the Documents and Settings folder that contains the WorkProduct folder.
C. Restore Peter’s WorkProduct folder, and choose an alternate location for the restoration.
D. Restore Peter’s WorkProduct folder, and choose the original location for the restoration.

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华南实木的竞争产品有（）。

A. 纤皮玉蕊
B. 榆木
C. 巴福云香
D. 重蚁木

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录音系统有哪些功能模块构成？系统设备包括哪些？

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