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减震器、骨架油封、滚轮、缓冲连接件中都离不开（）嵌件。

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标准麻花钻刃磨时，一般采用粒度为46～80、硬度为中软的（）砂轮为宜。

A. 氧化铝
B. 碳化物
C. 金刚石
D. 氧化铝或金刚石

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一般说来，酸碱指示剂的用量（）一些为佳，指示剂过（），会使终点不敏锐。

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痰热互结证，胸脘痞闷，按之则痛，咳痰黄稠，舌苔黄腻，脉滑数，宜选用（）

A. 二陈汤
B. 温胆汤
C. 贝母瓜蒌散
D. 清气化痰丸
E. 小陷胸汤

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You work as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. The TestKing.com network consists of a single ActiveDirectory domain named testking.com. TestKing.com has its headquarters in Chicago and a branch office in Dallas. Both offices are an ActiveDirectory site that is connected via high speed WAN link. The employees in these offices connect locallyto the servers in these offices. You are planning to install Exchange Server 2010； however， you need to plan the installation of theMailbox servers with the following criteria： * It should maintain user access to mailboxes from a server in their site， if a Mailbox server fails. * Remote mailboxes should bei accessible if a site fails.* Use the minimum amount of serves. What should you do？（）

A. The best option is to install six Mailbox servers.
B. The best option is to install four Mailbox servers.
C. The best option is to install three Mailbox servers.
D. The best option is to install two Mailbox servers.

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