[单选题] Which of the following is different in the meaning from the sentence “some parents may even stop their children from meeting their good friends”？
A. Some parents may even not allow their children to meet their good friend.
B. Some parents may even ask their children not to meet their good friends.
C. Some parents may not even let their children meet their good friends.
D. Some parents may want their children to meet their good friends.

[单选题] Which of the following sentences is right according to the passage？
A. Parents should like everything their children enjoy
B. In all families children can choose everything they like
C. Parents should try their best to understand their children better
D. Teenagers can only go to their friends for help

[单选题]Among the following statements, ( ) is correct.
A. As WCDMA sysetms use 2.6 GHz band, the first Fresnel zone has no impact on their signal propagation.
B. The Doppler effect has more impact on narrowband wireless systems than wideband wirless systems.
C. The electric field probability density distribution functions of fast fading and slow fading fit the Rayleigh distribution.
D. None of the above statement is correct.

[不定项选择题]You execute the following piece of code with appropriate privileges:

BEGIN DBMS_REDACT.ADD_POLICY ( END; object_schema object_name

Column_name policy_name function_type expression => 'SCOTT', => 'EMP',

=> 'SAL', => 'SCOTT_EMP', => DBMS_REDACT.FULL, => 'SYS_CONTEXT

(''SYS_SESSION_ROLES'',''MGR'') = ''FALSE'''); END; 

BEGIN DBMS_REDACT.ADD_POLICY ( object_schema object_name column_name

Policy_name function_type expression => 'SCOTT', => 'EMP_VW', => 'SAL',

=> 'SCOTT_EMP_VW', => DBMS_REDACT.NONE, => 'SYS_CONTEXT

(''SYS_SESSION_ROLES'',''MGR'') = ''FALSE'''); 

User SCOTT has been granted the CREATE SESSION privilege and the MGR role. 

Which two statements are true when a session logged in as SCOTT queries the SAL column in the view and the table?

A.

DataisredactedfortheEMP.SALcolumnonlyiftheSCOTTsessiondoesnothavetheM

GR role set.

B.

DataisredactedforEMP.SALcolumnonlyiftheSCOTTsessionhastheMGRroleset.

C.

Data is never redacted for the EMP_VW.SAL column.

D.

Data is redacted for the EMP_V.SAL column only if the SCOTT session has the

MGR role set.

E. Data is redacted for the EMP_V.SAL column only if the SCOTT session does not
Have the MGR role set. Correct

[判断题]水泥砂浆及预拌砌筑砂浆的强度等级可分为M5、M7.5、M10、M15、M20、M25、M30；水泥混合砂浆的强度等级可分为M5、M7.5、M10、M15。（ ）【JGJT 98-2011砌筑砂浆配合比设计规程4.0.1】
A.正确
B.错误

[单选题]在地形图上有高程分别为26m、27m、28m、29m、30m、31m、32m的等高线，则需加粗的等高线为（ ）m。
A.26、31
B.27、32
C.29
D.30

[判断题]38kg/m、43kg/m、50kg/m、60kg/m、75kg/m钢轨构造轨缝均采用8mm。（ ）（应知应会-《普速铁路线路修理规则》-第3.6.6条）
A.正确
B.错误

[判断题]布卷尺可以计数到厘米，规格有5m、10m、15m、20m、30m、50m，线路测量常用的规格有30m和50m两种。（ ）
A.正确
B.错误

[简答题] 我国铁路标准钢轨有75kg/m、60kg/m 、50kg/m、43kg/m、38kg/m 五种。

[不定项选择题]Which statement describes the significance of the CHANGE FAILURE

Command in RMAN? (Choose all that apply.) choose two

A.

It is used to change failure priority only for HIGH or LOW priorities.

B.

It is used to execute the advised repair script.

C.

It is used to change failure priority only for the CRITICAL priority.

D.

It is used to explicitly close the open failures.

E. It is used to inform the database about the repair after the repair script
Executes.

[单选题]M0—M15中,M0,M2数值都为1,其它都为0,那么,K4M0数值等于多少
A.10
B.9
C.11
D.5

[单选题]M0—M15中,M0,M3数值都为1,其它都为0,那么,K4M0数值等于多少
A.10
B.9
C.11
D.12

[判断题]架空光缆每500m一大预留5m（或12m），作预留支架固定；每200m一小预留0.2m（或0.5m），过电杆用PVC管保护。
A.正确
B.错误

[简答题]某一曲线半径 R=800m，L圆=116.5m，l1=60m，l2=40m，弦长为 20m，求该曲线上的圆曲线正矢及两端缓和曲线上的各点计划正矢。（其中包括 ZH、HY、YH、HZ）（单位精确到 mm）

[不定项选择题]Which two are prerequisites for performing Flashback Transaction?
A.

Fast Recovery Area must be enabled for the database.

B.

The EXECUTE privilege must be granted to a user on the DBMS_FLASHBACK

Package.

C.

Undo retention guarantee must be configured for the database.

D.

A supplemental log must be enabled for the primary key.

E.

Row movement must be enabled.

[判断题]封堵作业坑长8m×3m，换管作业坑长15m×3m，管底距坑底最少0.5m。作业坑管道两侧各设置1条逃生通道
A.正确
B.错误

[不定项选择题]Which three are true about RMAN persistent configuration settings,

Administration, and their effects? (Choose three.)

A. A target database’s persistent RMAN configuration settings are always stored
In the target’s control file
B. Backup older than the recovery window retention policy are always deleted
Automatically if the backup location has insufficient space.
C. Backups written to the fast recovery area (FRA) that are oboslete based on the
Redundancy retention policy can be deleted automatically to free space.
D. The RMAN SHOW ALL command displays only settings with nondefault
Values.
E. A target database’s persistent RMAN configuration settings are always
Synchronized automatically with the RMAN catalog.
F. The V$RMAN_CONFIGURATION view displays only settings with valuesthat
Have been modified.
G.A DBA must specify either a redundancy retention policy or a recovery window
Retention policy.

[不定项选择题]Which three are true about Automatic Workload Repository (AWR)

Snapshots?

A. They can be retained forever.
B. They are always created automatically.
C. They are always created manually.
D. They are generated if STATISTICS LEVEL is set to TYPICAL.
E. They are generated if STATISTICS LEVEL is set to BASIC.
F. They are generated if STATISTICS LEVEL is set to ALL.

[不定项选择题]Which two are true about gathering optimizer statistics? (Choose two.)
A. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to
CDB$ROOT gathers
Object statistics in all open PDBs except PDB$SEED.
B. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to a PDB
Opened in
Read/write mode gathers object statistics for that PDB.
C. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to
CDB$ROOT gathers
Object statistics only in CDB$ROOT.
D. System statistics can be gathered only while connected to CDB$ROOT.
E. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to
CDB$ROOT gathers object statistics in all open pluggable databases (PDBs)

[不定项选择题]choose three Which three RMAN persistent settings can be set

Explicitly?

A. SPFILE backup duplexing
B. control file auto backup formats
C. archive log deletion policy
D. image copy duplexing
E. redo log backup duplexing
F. archive log backup duplexing