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屏蔽泵安装过程中管路需注意的事项有哪些？

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安全阀释放的压力值应打在铅封上或阀体上，而且要求安全阀完全打开的压力值不超过开启时压力的1.1倍。

A. 正确
B. 错误

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医疗器械进货查验记录和销售记录应当保存至医疗器械有效期后（）年，无有效期的不得少于（）年，植入类医疗器械的记录（）。

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You work in a Organization which is named Wiikigo Corp. The Organization uses SQL Server 2008. You are the administrator of the Organization database. Now you are in charge of a SQL Server 2008 instance. Look at the following query: SELECT s., i. FROM SensitiveTbl AS s INNER JOIN InsensitiveTbl AS iON i. OrganizationName = s.OrganizationName You use the above query to join two tables on a column named OrganizationName. The following error is returned when you execute the query. "Msg 468, Level 16, State 9, Line 17 Cannot resolve the collation conflict between 'SQL_Latin1_General_CP1_CS_AS' and 'SQL_Latin1_General_CP1_CI_AS' in the equal to operation." The ON clause of the query has to be modified so that it can perform a case-sensitive joinsuccessfully. What should you do? （）

A. ON LOWER(i.OrganizationName) = LOWER(s.OrganizationName)
B. ON UPPER(i.OrganizationName) = UPPER(s.OrganizationName)
C. ON i.OrganizationName = s.OrganizationName COLLATE SQL_Latin1_General_CP1_CS_AS
D. ON i.OrganizationName = s.OrganizationName COLLATE SQL_Latin1_General_CP1_CI_AS&e

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下述零件不属于气门传动组的是（）。

A. 凸轮轴
B. 气门
C. 液力挺柱

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