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简要案情：被告人张某，19岁，系某高校在校学生。2008年9月10日晚，张某随身携带一把弹簧刀出门，伺机抢劫出租车司机钱物。当晚11时许，张某以打车找人为名，将出租车司机徐某骗至矿区一偏僻处，用随身携带的刀具相威胁，抢走徐的手机一部及人民币100余元后逃走。司机徐某立即报警。次日凌晨1时许，民警将张某抓获。9月12日，公安机关依法对张某刑事拘留。9月14日，由民警王某在刑警大队办公场所对张某进行了首次讯问。面对公安机关掌握的证据，张某最终承认了抢劫的犯罪事实。10月20日，公安机关提请检察院批捕。羁押期间，张某的父母申请取保候审，在张某家人缴纳了5000元的保证金和提供了担保人后，公安机关为其办理了取保候审手续。

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You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named named Dworks in the instance. The Dworks table has a table named BillDetails which has a clustered primary key named BillId on the BillId column. The BillDetails table has a single XML column named GoodsDetails. The XML column has an XML index and XML data are stored in this XML column. A new column named GoodsID is added to the BillDetails table. GoodsID must be included in the primary key. So what action should you perform to achieve this goal？（）

A. You should drop the XML index on the table. Modify the primary key. Recreate the XML index
B. You should alter the XML index and set the ALLOW_ROW_LOCKS = OFF option. Alter the primary key and set the ALLOW_ROW_LOCKS = ON option.
C. You should move the XML data to a temporary table. Clear the XML data from the original table by setting the GoodsDetails column to NULModify the primary key. Repopulate the ProductSpecs column.
D. You should disable the XML index on the GoodsDetails column. Modify the primary key.Enable the XML index on the ProductSpecs column.

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行政机关在收集证据时，在证据可能灭失或者以后难以取得的情况下，经行政机关负责人批准，可以先行登记保存。

A. 正确
B. 错误

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马克思主义基本方法是什么？

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卷板机按（）可分为三辊卷板机和四辊卷板机。

A. 设计能力
B. 布置方式
C. 轴辊数目
D. 驱动方式

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