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Before a Flashback Table operation, you execute the following command: ALTER TABLE employees ENABLE ROW MOVEMENT; Why would you need this to be executed?（）
A . Because row IDs may change during the flashback operation
B . Because the object number changes after the flashback operation
C . Because the rows are retrieved from the recycle bin during the flashback operation
D . Because the table is moved forward and back to a temporary during the flashback opertio
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This S/C may be（）three months before its expiry.
A . postponed
B . prolonged
C . expanded
D . renewed
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She（）mail the package before the post office closes.
A . has
B . have to
C . has to
D . must to
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You plan to set up the Automatic Workload Repository （AWR） baseline metric thresholds for a moving window baseline. Which action would you take before performing this task？（）
A . Compute the baseline statistics.
B . Take an immediate AWR snapshot.
C . Decrease the window size for the baseline.
D . Decrease the expiration time for the baseline.
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You use Microsoft Windows Mail to download e-mail messages to your Inbox. You need to minimize the receipt of e-mail messages that attempt to acquire private financial information. What should you do？（）
A . Create an Inbox rule that moves potentially malicious email to the Junk Mail folder.
B . Configure the Parental Controls Web restriction setting to High.
C . Configure the phishing filter to move the e-mail messages to the Junk Mail folder.
D . Configure Windows Defender to perform a custom scan of potentially malicious email.
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This Agreement may be（）6 months before its expiry.
A . renewed
B . prolonged
C . expanded
D . postponed
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If there are any items you would like to list on the agenda, please let me know by e-mail before the end of this week.这句话翻译成中文是（）
A . 如果各位想要参加会议， 请在本周末之前通过电子邮件与我联系。
B . 如果各位有想纳入会议议程表的事项， 请在本周末之前通过电子邮件与我联系。
C . 如果各位有事项想要纳入会议议程表， 请在本周末之前告知我电子邮件地址。
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Your organization has Exchange Server 2010.You need to ensure that users in the organization are notified before they send e-mail messages to external recipients. Which cmdlet should you run？（）
A . set-Mailbox
B . set-OrganizationConfig
C . set-TransportAgent
D . set-TransportConfig
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You are upgrading your Cisco router IOS from a TFTP server over the network. The upgrade procedure is stopped and you are prompted to erase the current flash contents before continuing. What is most plausible reason for this? （）
A . There is insufficient room for more than one image.
B . The router has detected a copy of the current software image on the TFTP server.
C . The file can be relocated and not compressed.
D . The image to load is a binary executable file.
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You executed the following command in Recovery Manager （RMAN）： RMAN> RESTORE CONTROLFILE； Which operation must you perform before this command is executed？（）
A . back up the control file to trace
B . bring database to the MOUNT state
C . open a connection to the RMAN recovery catalog， which contains the RMAN metadata for the target database
D . set the database ID （DBID）， but only if the DB_NAME parameter associated with the target database is unique in the recovery catalog
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You executed the following command in Recovery Manager （RMAN）： RMAN> RESTORE CONTROLFILE； Which operation must you perform before this command is executed？（）
A . back up the control file to trace
B . bring database to the MOUNT state
C . open a connection to the RMAN recovery catalog， which contains the RMAN metadata for the target database
D . set the database ID （DBID）， but only if the DB_NAME parameter associated with the target database is unique in the recovery catalog
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Before a Flashback Table operation，you execute the following command： ALTER TABLE employees ENABLE ROW MOVEMENT； Why would you need this to be executed？（）
A . Because row IDs may change during the flashback operation
B . Because the object number changes after the flashback operation
C . Because the rows are retrieved from the recycle bin during the flashback operation
D . Because the table is moved forward and back to a temporary during the flashback opertio
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This is what you should bear in mind： Don‘t ________ a salary increase before you actually get it.
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The receiver of this e-mail is
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When you apply for an E-mail box, you are expected to fill in your necessary personal information before you _____ the form.
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When setting up a limited company before October 2009 you had to decide on the maximum amount of share capital that the company could have. This is known as （18)… share capital.
A．Allowed
B．permitted
C．authorized
D．legitimate
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听力原文：W：Would you mind if we discuss tomorrow's agenda before dinner this evening？ We are simply running out of time．
M：Not at all. I certainly don't want to talk about it during our meal.
Q：When will they probably discuss the agenda？
(18)
A．Before dinner.
B．During dinner.
C．Right after dinner.
D．The next day.
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Woman: I can't bear the air pollution in this city any more. It's getting worse and worse. Man: You said it. We've never had so many factories before. Question: What does the man mean？
A．The air pollution is caused by the development of industry.
B．The city was poor because there wasn't much industry then.
C．The woman's exaggerating the seriousness of the pollution.
D．He might move to another city very soon.
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This is what you should bear in mind: Don’t（）a salary increase before you actually get it.
A．hang on
B．draw on
C．wait on
D．count on
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听力原文：MB I just wanted to remind you that registration for little league baseball's already started, and if you want the kids to take part, you need to register them before the end of the month. Are you planning on enrolling them this year？
WB Yes, but... registration's already begun？ It's only January! When does the league begin？
MB The league doesn't start until May, but... yes, we always do registration this early. And let me tell you, with all the kids that sign up, and all the games that need to be scheduled, we need to do this early, so we can focus on getting kids ready to play once the league begins.
WB Wow, I don't remember it being this early last year. Yes, of course... I'll drop by and register the kids this week. Is it going to cost the same as last year, or has it gone up？
Why has the man contacted the woman？
A．To schedule an appointment
B．To invite her children to an event
C．To inform. her of a change in policy
D．To remind her of an important deadline
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You should spend about 20 minutes on this task. The two maps below show an island, before and after the construction of some tourist facilities. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.
<img src='https://img2.soutiyun.com/ask/uploadfile/10656001-10659000/6b3ce58323fcf4e76301896a1cb77887.png' />
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You want the text "Unauthorized access prohibited!" to be displayed before the login prompt every time someone tries to initiate a Telnet session to a router, as shown in the example below:Which command can be used to configure this message？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/37718909cdcb92c64ed79cbec91a12aa.jpg' />
A. login banner x Unauthorized access prohibited! X
B. banner exec y Unauthorized access prohibited! Y
C. banner motd x Unauthorized access prohibited! X
D. vtv motd "Unauthorized access prohibited!"
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Before a Flashback Table operation, you execute the following command:ALTER TABLE employees ENABLE ROW MOVEMENT;Why would you need this to be executed？（）
A. Because row IDs may change during the flashback operation
B. Because the object number changes after the flashback operation
C. Because the rows are retrieved from the recycle bin during the flashback operation
D. Because the table is moved forward and back to a temporary during the flashback operation
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You should make sure of its being genuine before buying this painting. （periodic sent
You should make sure of its being genuine before buying this painting. (periodic sentence)
