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十九世纪中叶，在广州的（）街诞生了第一间现代化的茶楼，号称为（）。

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铁路危险化学品运输事故应急响应，分别由国务院或国务院授权（）、铁路局响应。

A. 经济管理委员会
B. 交通部
C. 铁道部
D. 技术质量监督局

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2020年，国家电网公司将全面建成统一的（），技术和装备将全面达到国际先进水平。

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An online retailer is considering deploying a database application on xSeries and Windows to serve their Web-based transactions. The database will need about 4TB of usable storage. Downtime costs the customer tens of thousands of dollars per minute， so system availability will be of highest priority. The customer needs to acquire the system within a certain budget but will pay for things that provide higher system availability. Which of the following will be the most appropriate solution？（）

A dual pathed switched DS4000 Solution with Clustering， Remote replication， Redundant NICs， and Fibre attached backup
B. A single path Direct attach DS4000 solution implemented with Clustering and SAN Based Backup combined with IBM Director for PFA management
C. A dual pathed Direct Attach fibre solution， along with dual NICs and memory mirroring
D. An iSCSI solution with dual NIC’s with the Flashcopy option enabled on the DS300

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冷轧带钢酸洗前矫直的作用主要是（）

A. 拆卷时产生的弯曲
B. 减少带钢波浪
C. 消除带钢在机组上运行产生的表面划伤
D. 减少一定的压下量

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