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数据库是建立信息网络不可缺少的信息资源，一般可分为文献数据库、数值数据库、事实数据库。下列哪个数据库属于文献数据库（）。
A . A、人才
B . B、商品
C . C、中国学术期刊
D . D、统计
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On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command: $> sqlldr hr/hr@pdb table=employees Which two statements are true regarding the command?（）
A . It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.
B . It fails because no SQL *Loader data file location is specified.
C . It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.
D . It fails because no SQL *Loader control file location is specified.
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In your multitenant container database (CDB) with two pluggable database (PDBs). You want to create a new PDB by using SQL Developer. Which statement is true?（）
A . The CDB must be open.
B . The CDB must be in the mount stage.
C . The CDB must be in the nomount stage.
D . Alt existing PDBs must be closed.
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SQL Server的数据库包括系统数据库和用户数据库，系统数据库有master数据库、msdb数据库、model数据库、tempdb数据库，其中的master数据库的主要功能是从整体上控制用户数据库和SQL Server操作。
A . 正确
B . 错误
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PDB位于飞机的什么部位？
A . 驾驶舱
B . 尾舱
C . 左电子设备架
D . 右电子设备架
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数据库包括关系数据库、网状数据库、层次数据库等类型。
A . 正确
B . 错误
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In your multitenant container database (CDB) containing pluggable databases (PDB), users complain about performance degradation. How does real-time Automatic database Diagnostic Monitor (ADDM) check performance degradation and provide solutions?（）
A . It collects data from SGA and compares it with a preserved snapshot.
B . It collects data from SGA, analyzes it, and provides a report.
C . It collects data from SGA and compares it with the latest snapshot.
D . It collects data from both SGA and PGA, analyzes it, and provides a report
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在分布式数据库系统中，每个数据库都有一个唯一的全局数据库名称，全局数据库名称应由数据库名和域名组成，其中北京中心的全局数据库名称是（），数据库名称是（）。
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Your multitenant container database has three pluggable databases (PDBs): PDB1, PDB2, and PDB3.Which two RMAN commands may be; used to back up only the PDB1 pluggable database?（）
A . BACKUP PLUGGABLE DATABASE PDB1 while connected to the root container
B . BACKUP PLUGGABLE DATABASE PDB1 while connected to the PDB1 container
C . BACKUP DATABASE while connected to the PDB1 container
D . BACKUP DATABASE while connected to the boot container
E . BACKUP PLUGGABLE database PDB1 while connected to PDB2
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当数据库损坏时，数据库管理员可通过主数据库文件恢复数据库。
A . 正确
B . 错误
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Which two statements are true concerning the Resource Manager plans for individual pluggabledatabases (PDB plans) in a multitenant container database (CDB)?（）
A . If no PDB plan is enabled for a pluggable database, then all sessions for that PDB are treated to an equal degree of the resource share of that pdb.
B . In a PDB plan, subplans may be used with up to eight consumer groups.
C . If a PDB plan is enabled for a pluggable database, then resources are allocated to consumer groups across all PDBs in the cdb.
D . If no PDB plan is enabled for a pluggable database, then the PDB share in the CDB plan is dynamically calculated.
E . If a PDB plan is enabled for a pluggable database, then resources are allocated to consumer groups based on the shares provided to the PDB in the CDB plan and the shares provided to the consumer groups in the PDB plan.
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Which three statements are true concerning unplugging a pluggable database (PDB)?（）
A . The PDB must be open in read only mode.
B . The PDB must be dosed.
C . The unplugged PDB becomes a non-cdb.
D . The unplugged PDB can be plugged into the same multitenant container database (CDB)
E . The unplugged PDB can be plugged into another cdb.
F . The PDB data files are automatically removed from disk.
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You create a new pluggable database, HR_PDB, from the seed database. Which three tablespaces arecreated by default in HR_PDB?（）
A . SYSTEM
B . SYSAUX
C . EXAMPLE
D . UNDO
E . TEMP
F . USERS
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SIUI板上COM口上的电缆被连接到PDB配电箱中，用于电源告警监控
A . 正确
B . 错误
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数据库系统是采用了数据库技术的计算机系统,数据库系统由数据库、数据库管理系统、应用系统和( )组成
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概念数据库是存储数据库的抽象,外部数据库是概念数据库的部分抽取。
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5、PDB文件是如何存储蛋白质3D结构的？
A．通过存储GIF动画
B．通过存储氨基酸序列
C．通过存储全息影像
D．通过存储蛋白质中每个原子的3D坐标
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You are connected to a pluggable database （PDB) as a common user with DBA privileges.The S
You are connected to a pluggable database (PDB) as a common user with DBA privileges.The STATISTICS_LEVEL parameter is PDB_MODIFIABLE. You execute the following:SQL ＞ ALTER SYSTEM SET STATISTICS_LEVEL = ALL SID = ‘*’ SCOPE = SPFILE;Which is true about the result of this command？（）
A. The STATISTICS_LEVEL parameter is set to all whenever this PDB is re-opened.
B. The STATISTICS_LEVEL parameter is set to ALL whenever any PDB is reopened.
C. The STATISTICS_LEVEL parameter is set to all whenever the multitenant container database (CDB) is restarted.
D. Nothing happens; because there is no SPFILE for each PDB, the statement is ignored.
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You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB) as a pluggable database (PDB).The characteristics of the non-CDB are as follows:-Version: Oracle Database 12c Releases 1 64-bit -Character set: WE8ISO8859P15 -National characterset: AL16UTF16 -O/S: Oracle Linux 6 64-bitThe characteristics of the CDB are as follows: -Version: Oracle Database 12c Release 1 64-bit -Characterset: AL32UTF8 -O/S: Oracle Linux 6 64-bitWhich technique should you use to minimize down time while plugging this non-CDB into the CDB？（）
A. Transportable database
B. Transportable tablespace
C. Data Pump full export / import
D. The DBMS_PDB package
E. RMAN
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数据库系统一般由数据库、数据库管理系统、和数据库用户及部分组成（）
A．业务应用层系统
B．应用程序系统
C．数据逻辑系统
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PDB的定向方式有哪些（）
A．支持时间段
B．地域
C．分段
D．人群属性
E．兴趣
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老伍按一下格式生成数据：import pandas as pdb=pd.Series([9,8,7,6],index=['a','b','c','d'])b.index请问输出结果为：
A:Index([9, 8, 7, 6], dtype='int64');
B:Index(['a','b','c','d'], dtype='object');
C:Index(['a','b','c','d'], dtype='int64');
D:Index([9, 8, 7, 6], dtype='object')
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1、为附件中exercise1.fasta中的5条序列创建多序列比对。多序列比对工具自选。比对结果保存后通过JalView，以Clustalx颜色方案标记。将编辑后的多序列比对保存为图片提交。注意调整图片宽度及文字大小。自己尽量多的尝试一下JalView的各种功能，参考help。 JalView下载：附件中可下载Windows版JalView安装包（不含JAVA，JAVA安装参见第二章第二部分第7节：PDB文件3D展示Jsmol_附件） 课程不支持大于50M的附件上传，如需下载自带JAVA安装的Jalview安装文件或其他版本安装文件，请前往Jalview官网下载：https://www.jalview.org/Web_Installers/install.htm
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9、PDB文件是如何存储蛋白质3D结构的？
A．通过存储蛋白质中每个原子的3D坐标
B．通过存储GIF动画
C．通过存储氨基酸序列
D．通过存储全息影像
