You have calibrated your RDF.When compiling the calibration table,the correction to be applied to any future RDF bearings is listed against the ______.A.true bearing of the transmitterB.relative bearing of the transmitterC.heading of the vesselD.time of r

题目

You have calibrated your RDF.When compiling the calibration table,the correction to be applied to any future RDF bearings is listed against the ______.

A.true bearing of the transmitter

B.relative bearing of the transmitter

C.heading of the vessel

D.time of reception


相似考题
更多“You have calibrated your RDF.When compiling the calibration table,the correction to be app ”相关问题
  • 第1题:

    What is the teacher doing in terms of error correction?
    T: Does any of you have a pet at home?
    S: I have dog at home.
    T: Oh, I see you have a dog at home. Is your dog big or small?

    A.Helping self-correction.
    B.Issuing indirect correction.
    C.Tolerating correction.
    D.Peer correction.

    答案:C
    解析:
    考查英语教学中的提问技巧。在英语教学中恰当地运用教学手段可以激励学生学习动力。C项的提问比较开放,且有助于全体学生的积极参与,能够激起学生的学习兴趣。

  • 第2题:

    Write an essay based on the following table.In your writing,you should describe the table,and give your comments.You should write at least 150 words.You should write at least 150 words.



    答案:
    解析:
    This table ilustrates the difference of degree of satisfaction among employees at different ages in some company.In general,the overall trend of the degree of satisfaction is different with the variation of ages.Of those who feel satisfactory about their jobs,those beyond 50 years old take up the majority,accounting for 40%,followed by those who are no more than 40 years old,which take up 16.7%.Those between 41 to 50 years old have the lowest satisfactory rate,merely0.0%.Of those who feel dissatisfactory about their jobs,those between 41 to 50 years old take up the majority,accounting for 64.0%,followed by those less than 40 years old,which take up 33.3%.Those who beyond 50years old enjoy the lowest dissatisfactory rate,taking up only 10%.Besides,there are still 50.0%of less than 40 years old employees,36.0%of those between 41 to 50 years old and 50.0%of over 50 years old employees remaining uncertain about the degree of satisfaction.The contributory factors to this result can mainly divide into three parts.Firstly,those less than 40 years old are ambitious,impractical and eager to find their places in work.With those characteristics,they often get upset find their places in work.With those characteristics,they often get upset when they fail to fulfill their goals.Secondly,those between 41 to 50 years old employees,confronted with challenges posed by their young colleagues,often face a great deal of working competition and pressure.Lastly,with their impending retirement,those beyond 50 years old face relatively small working pressure and feel satisfactory about their jobs.From this table,we can make a conclusion that if the companies want to raise the degree of satisfaction of its employees,it should make more efforts to improve the working environment,ameliorate the welfare and establish the effective incentive mechanism.

  • 第3题:

    While designing your database, you have created the EMPLOYEES table as an index/x7forganized table (IOT). You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index?()

    • A、A primary key must have been created.
    • B、A mapping table must have been created.
    • C、An overflow tablespace must have been specified.
    • D、The PCTTHRESHOLD option must have been specified.

    正确答案:B

  • 第4题:

    You have a very large table that your users access frequently. Which of the following advisors will recommend any indexes to improve the performance of queries against this table?()

    • A、The Automatic Memory Manager (AMM)
    • B、The SQL Tuning Advisor
    • C、The Segment Advisor
    • D、The SQL Access Advisor

    正确答案:D

  • 第5题:

    You are shrinking the SCOTT.EMP table by executing the ALTER TABLE SCOTT.EMP SHRINK SPACE CASCADE statement. What is a prerequisite for shrinking the SCOTT.EMP table?()

    • A、 You must enable the block change tracking feature.
    • B、 You must have enable the flashback feature.
    • C、 You must use the OMF in your database.
    • D、 You must define the tablespace of the SCOTT.EMP table for automatic segment space management.

    正确答案:D

  • 第6题:

    Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10:00 P.M. and 10:30 P.M. The next day, you decide to flash back the database. Before you flash back the database, you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table?()

    • A、 V$DATABASE
    • B、 V$UNDOSTAT
    • C、 V$FLASHBACK_DATABASE_LOG
    • D、 V$FLASHBACK_DATABASE_STAT

    正确答案:C

  • 第7题:

    多选题
    In your Oracle 10g database , you have scheduled a job to update the optimizer statistics at 05:00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected?()
    A

    average row size

    B

    last analyzed date

    C

    size of table in bytes

    D

    size of table in database blocks

    E

    number of free blocks in the free list

    F

    number of extents present in the table


    正确答案: A,C
    解析: 暂无解析

  • 第8题:

    单选题
    What is the teacher doing in terms of error correction?     T: Does any of you have a pet at home?     S: / have dog at home.     T: Oh, / see you have a dog at home. Is your dog big or small?
    A

    Helping students do self-correction.

    B

    Indirect correction.

    C

    Tolerating correction.


    正确答案: C
    解析:

  • 第9题:

    单选题
    On Monday, you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday, you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct?()
    A

     You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.

    B

     You can restore the DEPT table by using the Oracle Flashback Drop feature, provided you use the RENAME TO clause.

    C

     You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.

    D

     You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.


    正确答案: A
    解析: 暂无解析

  • 第10题:

    单选题
    While designing your database, you have created the EMPLOYEES table as an index/x7forganized table (IOT). You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index?()
    A

    A primary key must have been created.

    B

    A mapping table must have been created.

    C

    An overflow tablespace must have been specified.

    D

    The PCTTHRESHOLD option must have been specified.


    正确答案: B
    解析: 暂无解析

  • 第11题:

    单选题
    You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema.You execute the following statement: FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2; What will be the result of executing this statement?()
    A

    One of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.

    B

    One of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.

    C

    Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.

    D

    None of the tables are recovered from the Recycle Bin, and the statement returns an error.


    正确答案: D
    解析: 暂无解析

  • 第12题:

    单选题
    On Monday, you dropped the DEPT table from your schema and then you re/x7fcreated the DEPT table in your schema. On Wednesday, you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct?()
    A

    You can restore the DEPT table by using the Oracle Flashback Drop feature, provided you use the RENAME TO clause.

    B

    You can restore the DEPT table by using the Oracle Flashback Drop feature and a system­generated name will be assigned to the restored table.

    C

    You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table withthe name DEPT already exists in your schema.

    D

    You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.


    正确答案: B
    解析: 暂无解析

  • 第13题:

    Passage One
    Table top magic requires no secret formula.Even the simplest meal will be received with enthusiasm if the table accessories are creative and colorful.No matter what type of dinnerware you own,you can enhance its beauty with a variety of attractive table linens.
    When selecting a supply of tablecloths,place mats and napkins,choose easy—care or permanent—press fabrics because these fabrics will reduce your workload when washday rolls around.Another consideration is the suitability of your linens for your dining style or the types of entertaining you do.The shape of your table will also dictate the kind of tablecloth you purchase.Circular or rounded tables look best covered with round or oval tablecloths.Square—cornered tables require squares or rectangles.
    Finally,your table linens should?complement?your dinnerware.An elegant table setting requires an elegant tablecloth.A setting of stoneware looks best with heavy of colorful fabrics.
    But sure to take all the necessary measurements before you start shopping for fabric of your choice.It could be embarrassing if your tablecloths are not long enough to cover the tables.It is equally distressing if your tablecloth is so long that your guests have to watch where they walk.

    Tile author suggests that you purchase table linens made of______.

    A.bleacsafe fabric
    B.preshrunk cloth
    C.easy—care material
    D.stain—resistant cotton

    答案:C
    解析:
    暂无解析

  • 第14题:

    You have a very large table that your users access frequently. Which of the following advisors will recommend any indexes to improve the performance of queries against this table?()

    • A、The Automatic Memory Manager (AMM)
    • B、The SQL Tuning Advisor
    • C、The Segment Advisor
    • D、The SQL Access Advisor SQL

    正确答案:D

  • 第15题:

    While designing your database, you have created the EMPLOYEES table as an index-organized table (IOT). You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index?() 

    • A、A primary key must have been created.
    • B、A mapping table must have been created.
    • C、An overflow tablespace must have been specified.
    • D、The PCTTHRESHOLD option must have been specified.

    正确答案:B

  • 第16题:

    The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR; ()

    • A、You obtain the results retrieved from the public synonym HR created by the database administrator.
    • B、You obtain the results retrieved from the HR table that belongs to your schema.
    • C、You get an error message because you cannot retrieve from a table that has the same name as a public synonym.
    • D、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product.
    • E、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.

    正确答案:B

  • 第17题:

    You work as a database administrator for Certkiller .com. In your transaction application, you have scheduled a job to update the optimizer statistics at05:00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected?()

    • A、Average row size
    • B、Last analyzed date
    • C、Size of table in bytes
    • D、Size of table in database blocks
    • E、Number of free blocks in the free list
    • F、Number of extents present in the table.

    正确答案:A,B,D

  • 第18题:

    多选题
    You work as a database administrator for Certkiller .com. In your transaction application, you have scheduled a job to update the optimizer statistics at05:00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected?()
    A

    Average row size

    B

    Last analyzed date

    C

    Size of table in bytes

    D

    Size of table in database blocks

    E

    Number of free blocks in the free list

    F

    Number of extents present in the table.


    正确答案: F,A
    解析: 暂无解析

  • 第19题:

    单选题
    What is the teacher doing in terms of error corection?T: Does any of you have a pet at home?S:I have dog at home.T: Oh,I see you have a dog at home. Is your dog big or small?
    A

    Helping students do self-correction.

    B

    Indirect correction.

    C

    Tolerating correction.

    D

    Encouraging students to do peer correction.


    正确答案: D
    解析:

  • 第20题:

    单选题
    You have calibrated your RDF. When compiling the calibration table,the correction to be applied to any future RDF bearings is listed against the().
    A

    true bearing of the transmitter

    B

    relative bearing of the transmitter

    C

    heading of the vessel

    D

    time of reception


    正确答案: B
    解析: 暂无解析

  • 第21题:

    单选题
    In your test database, you have created the ORDERS table as an index-organized table (IOT). To facilitate faster querying, you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrees when users perform a large volume of transactions. While investigating the reason, you find that the mapping table segment is fragmented, leading to poor performance. Which option would you use to defragment the mapping table without affecting the original table data?()
    A

     Export and import the mapping table.

    B

     Drop and re-create the mapping table.

    C

     Truncate the mapping table and reinsert the values.

    D

     Use the ALTER TABLE .. REBUILD command to defragment the mapping table.


    正确答案: B
    解析: 暂无解析

  • 第22题:

    单选题
    You are shrinking the SCOTT.EMP table by executing the ALTER TABLE SCOTT.EMP SHRINK SPACE CASCADE statement. What is a prerequisite for shrinking the SCOTT.EMP table?()
    A

     You must enable the block change tracking feature.

    B

     You must have enable the flashback feature.

    C

     You must use the OMF in your database.

    D

     You must define the tablespace of the SCOTT.EMP table for automatic segment space management.


    正确答案: C
    解析: 暂无解析

  • 第23题:

    单选题
    In your test database, you have created the ORDERS table as an index-organized table (IOT). To facilitate faster querying, you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrades when users perform a large volume of transactions.  While investigating the reason, you find that the mapping table segment is fragmented, leading to poor performance.   Which option would you use to defragment the mapping table without affecting the original table data?()
    A

    export and import the mapping table

    B

    drop and re-create the mapping table

    C

    truncate the mapping table and reinsert the values

    D

    use the ALTER TABLE···REBUILD command to defragment the mapping table


    正确答案: D
    解析: 暂无解析