皮皮学，免费搜题
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【单选题】
在炭片调压器中,电压升高时
A.
被拉松，电阻减小，励磁电流减小；
B.
被压紧，电阻增大，励磁电流减小。
C.
被拉松，电阻增大，励磁电流増大；
D.
被拉松，电阻增大，励磁电流减小。
拍照语音搜题，微信中搜索"皮皮学"使用
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【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.
查看完整题目与答案
【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
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【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.
查看完整题目与答案
【单选题】72
A.
tree
B.
table
C.
database
D.
record
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【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
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【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
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【单选题】Examine the following commands executed in your database： SQL> ALTER SESSION RECYCLEBIN=ON； Session altered  SQL> CREATE TABLE emp TABLESPACE tbsfd AS SELECT * FROM hr.employees；  Table created.  Furt...
A.
The table is moved to the SYSAUX tablespace.
B.
The table is moved to the SYSTEM tablespace.
C.
The table is removed from the database permanently.
D.
The table is renamed and remains in the TBSFD tablespace.
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【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.
查看完整题目与答案
【单选题】右图为植物细胞减数第一次分裂中某时期示意图,相关叙述正确的是( )
A.
细胞中有2对同源染色体
B.
细胞中有8条染色体
C.
细胞中有4个DNA分子
D.
细胞中染色单体数为0
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【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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相关题目：
【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.
查看完整题目与答案
【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
查看完整题目与答案
【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.
查看完整题目与答案
【单选题】72
A.
tree
B.
table
C.
database
D.
record
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【单选题】Examine the following commands executed in your database： SQL> ALTER SESSION RECYCLEBIN=ON； Session altered  SQL> CREATE TABLE emp TABLESPACE tbsfd AS SELECT * FROM hr.employees；  Table created.  Furt...
A.
The table is moved to the SYSAUX tablespace.
B.
The table is moved to the SYSTEM tablespace.
C.
The table is removed from the database permanently.
D.
The table is renamed and remains in the TBSFD tablespace.
查看完整题目与答案
【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.
查看完整题目与答案
【单选题】右图为植物细胞减数第一次分裂中某时期示意图,相关叙述正确的是( )
A.
细胞中有2对同源染色体
B.
细胞中有8条染色体
C.
细胞中有4个DNA分子
D.
细胞中染色单体数为0
查看完整题目与答案
【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
查看完整题目与答案