关于Block2007研究与Block2005研究，以下哪项是正确（）

A . block used only with manila rope B . chock roller C . hinged block D . strong block used for short，sharp pull

A . when row directories need more row entries B . when there is row migration in the data block C . when there is an increase in the PCTFREE value for the data block D . when more transaction slots are required than are initially configured

A . The Oracle database will perform block checking for the index blocks only B . The Oracle database will not perform block checking for any of the data blocks C . The Oracle database will perform block checking for the default permanent tablespace only D . The Oracle database will perform block checking for the data blocks in all user tablespaces E . The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only

A . 11 B . 12 C . 13 D . 26 E . 52

A . 4；12 B . 4；13 C . 4；6 D . 8；6

A . 256 B . 512 C . 1024 D . 2048

A .  The Enforce Primary Key property on the STUDENT block is set to Yes.  B .  The Alias property on the COURSES_OFFERED block is set to Student.  C .  The Copy Value from item property on the foreign key item in the STUDENT blocks is set to the primary key item of the COURSES_OFFERED block.  D .  The Synchronize with item property on the foreign key item in the STUDENT block is set to the primary key item of the COURSES_OFFERED block.

A . 盐酸司维拉姆与含钙的磷结合剂的使用对死亡率没差别 B . 基线CACS是患者全因死亡率一个显著的预测因子 C . 含钙的磷结合剂的使用与2倍的死亡率升高相关 D . 盐酸司维拉姆的使用与死亡率降低相关

A . Block是HDFS中最小的数据存储单位 B . Split是MapReduce中最小的计算单元 C . Block与Split是一一对应关系 D . Block和Split之间对应关系是任意的，可由用户控制

A .  The Oracle database will perform block checking for the index blocks only B .  The Oracle database will not perform block checking for any of the data blocks C .  The Oracle database will perform block checking for the default permanent tablespace only D .  The Oracle database will perform block checking for the data blocks in all user tablespaces E .  The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only

对 错

A．一个resource block在频域占180kHz，在时域占0.5ms B．一个resource block在频域占180kHz，在时域占1ms C．一个resource block在频域占15kHz，在时域占0.5ms D．一个resource block在频域占15kHz，在时域占1ms

A．3份 B．2份 C．1份 D．不确定

A．1 B．2 C．3 D．不确定