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If ______ is shut down for an extended time optimum position fixing will take up to 2 hour

题目

If ______ is shut down for an extended time optimum position fixing will take up to 2 hours after power is reapplied.

A.radar

B.DF

C.Satellite Navigator

D.Automatic Omega Navigator

参考答案和解析
正确答案：C
假如卫星导航仪关闭较长一段时间则获得最佳的定位将在电源被重新开启后达2小时。
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相似问题和答案

第1题：

How should you signal the crane operator to lower the boom?______.

A.With arm extended and fingers closed, point thumb downward

B.With arm extended downwards and forefinger pointing down, move hand in small horizontal circles

C.Extend arm with the palm down, and hold this position rigidly

D.With hands clasped in front of your body


正确答案：A
你应怎样指挥起货机手落放吊杆?伸开臂膀握紧拳头拇指向下

第2题：

Afternoon, sir. Where to? -- （）

APlease get me to the airport

Bplease pick me up next time

CI’ve been to the airport

DThe plane will take off in an hour


A
略

第3题：

The two plants he had ever worked for have _______ due to foreign competition.

(A) shut down

(B) shut up

(C) shut off

(D) shut away


正确答案：A
解答参考：A.短语用法题。shut down(使工厂等)停工，歇业，关闭;shut up 住嘴;shut off ―停止供应(煤气，水等);shut away 不是正确短语。根据题意，应该选择A。【译文】他曾经工作过的两家工厂由于遇到来自国外的竞争而关闭了

第4题：

A user is reporting that a PC will suddenly shut down without warning. The PC boots up with no problems, but after using the PC for a short time, the PC turns off. Which of the following components should the technician check?（） (Select TWO).

  • A、CPU fan
  • B、RAM
  • C、Hard drive
  • D、Power supply
  • E、Video card

正确答案:A,D

第5题：

While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface to be?（）

  • A、Serial 0 is up, line protocol is up
  • B、Serial 0 is up, line protocol is down
  • C、Serial 0 is down, line protocol is down
  • D、Serial 0 is down, line protocol is up
  • E、Serial 0 is administratively down, line protocol is down
  • F、Serial 0 is administratively down, line protocol is up

正确答案:E

第6题：

How should you signal the crane operator to stop?______.

A.Place both fists in front of your body with thumbs pointing pointing outward

B.With both arms extended out and palms down, move arms back and forth

C.Extend arm with the palm down and hold this position rigidly

D.Clasp hands in front of your body


正确答案：C
你应怎样指挥起货机手停止？展开臂膀手掌向下并坚挺的地保持这个位置

第7题：

Afternoon, sir. Where to? -- （）

  • A、Please get me to the airport
  • B、please pick me up next time
  • C、I’ve been to the airport
  • D、The plane will take off in an hour

正确答案:A

第8题：

While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface to be?（）

A. Serial 0 is up, line protocol is up

B. Serial 0 is up, line protocol is down

C. Serial 0 is down, line protocol is down

D. Serial 0 is down, line protocol is up

E. Serial 0 is administratively down, line protocol is down

F. Serial 0 is administratively down, line protocol is up


参考答案：E

第9题：

Consider the recovery steps in each of the cases given below：  Case 1：  Shut down the database and perform a backup.  Restore all the data files.  Mount the database.  Recover the database.  Without applying all the redo log files， open the database using the RESETLOGS option.  Back up the database.  Case 2：  Shut down the database and perform a backup.  Restore only the data files of the tablespace where user error damaged the data.  Mount the database.  Recover the database.  Open the database with the RESETLOGS option.  Back up the database.  Case 3： Shut down the database  Restore the data files  Open the database  Perform recovery to the current point in time.  Which case has the correct steps for an incomplete recovery？（）

  • A、only case 1
  • B、only case 2
  • C、only case 3
  • D、case 1 and 2
  • E、case 2 and 3
  • F、case 1 and 3
  • G、all cases： case 1， case 2 and case 3

正确答案:A

第10题：

Your database is in NOARCHIVELOG mode. You start to do a backup， but your users complain that they dont want you to shut down the database to perform the backup. What options are available to you？（）  

  • A、 Put the database in hot backup mode and perform an online backup，including backing up the  archived redo logs.
  • B、 Just back up the database datafiles without shutting down the database.
  • C、 You will have to wait until you can shut down the database to perform the backup.
  • D、 Mark each datafile as backup in progress， back them up individually，and then mark them as backup not in progress. No archived redo logs will need to be backed up.
  • E、 Only back up the datafiles that the user will not be touching. Once the user has finished what they were doing，you can shut down the database and back up the datafiles the user changed during the  course of the remaining backup

正确答案:C

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