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【多选题】
既可以作为复杂系统中的环节,又可以单独成为闭环系统,并且具有动态特性的典型环节是 :
A.
比例环节
B.
微分环节
C.
惯性环节
D.
积分环节
E.
振荡环节
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【简答题】主要特种合成橡胶有哪些?
【单选题】Two database users, Jack and Bill, are accessing the Certkiller STAFF table of the Certkiller DB database. When Jack modifies a value in the table, the new value is invisible to Bill.  Which is the mo...
A.
The modified data are not available on disk.
B.
The modified data have been flushed out from memory.
C.
The modified rows of the Certkiller STAFF table have been locked.
D.
Jack has not committed the changes after modifying the value.
E.
Both users are accessing the database from two different machines.
【多选题】合成橡胶中可用于接触食品的橡胶制品主要有
A.
硅橡胶
B.
氯丁橡胶
C.
丁橡胶
D.
丁基橡胶
E.
丁苯橡胶
【多选题】You are the administrator of a SQL Server 2000 database. You import a table of geographic information from a Microsoft access database into a SQL Server 2000 database. The table has 12,000 rows. Each ...
A.
Create a 60-MB data file named geography.ndf
B.
Create a 95-MB data file named geography.ndf
C.
Create a 60-MB data file named geography.mdf
D.
Create a 95-MB data file named geography.mdf
E.
Place the table in the PRIMARY filegroup.
F.
Place the table in a new filegroup named LOCATION.
【单选题】72
A.
tree
B.
table
C.
database
D.
record
【单选题】The database model that organizes information into tables of records that are connected to one another by linking a field in one table to a field in another table is called ________.
A.
hierarchical database
B.
relational database
C.
network database
D.
object-oriented database
【单选题】调查问卷是市场调查基本的、有效的调查工具,调查问卷主要用于( )的搜集
A.
第一手资料
B.
第二手资料
C.
内部资料
D.
外部资料
【单选题】一个单片机的组成中,不是必须包含的模块是
A.
微处理器CPU
B.
存储器
C.
I/O接口
D.
DMA控制器
【单选题】Two database users, Jack and Bill, are accessing the SupportCenter STAFF table of the SupportCenter DB database. When Jack modifies a value in the table, the new value is invisible to Bill. Which is t...
A.
The modified data are not available on disk.
B.
The modified data have been flushed out from memory.
C.
The modified rows of the SupportCenter STAFF table have been locked.
D.
Jack has not committed the changes after modifying the value.
E.
Both users are accessing the database from two different machines.
【单选题】合成橡胶中可用于接触食品的橡胶制品主要有哪些
A.
硅橡胶、丁基橡胶、丁苯橡胶及丁腈橡胶
B.
氯丁胶、硅橡胶、丁基橡胶
C.
乙丙橡胶、丁腈橡胶、硅橡胶、丁基橡胶
D.
氯丁胶、丁基橡胶、丁腈橡胶、硅橡胶
E.
硅橡胶、丁基橡胶、乙丙橡胶、丁苯胶、丁腈胶、氯丁胶
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