What is the purpose of writing a topic sentence at the beginning of a paragraph?

A . Defines permissions for remote machines contacting the local machine through BNU B . Specifies dialer and modem types for uucp connections C . Defines basic communication parameters D . Assigns alternate or additional Systems， Devices and Dialers file

A . To manage the user’s login and logout activities. B . To store information on the client-side between HTTP requests. C . To store information on the server-side between HTTP requests. D . To tell the web container to keep the HTTP connection alive so it can make subsequent requestswithout the delay of making the TCP connection.

A .  To review RMAN control file and recovery catalog metadata and ensure that its correct B .  To delete RMAN backup-related metadata from the recovery catalog C .  To create metadata in the control file and the recovery catalog related to backup set pieces  D .  To create a report that lists database backups E .  To rebuild the recovery catalog

A . To act as ballast for light vessels B . To provide ventilation and drainage for cargo C . To secure the tarpaulins in place D . To support weakened bulkhead

A .  It must be used because all RMAN-related backup and recovery metadata information is contained in it. B .  It provides a convenient， optional， repository of backup- and recovery-related metadata. C .  It provides the ability to store RMAN scripts for global use by any database that has access to the repository. D .  It provides a means of storing all RMAN backup sets physically in an Oracle database server.  E .  It provides the ability to store backup records for more than a year.

A . to build a Packet Description Language Module （PDLM） file to be used in protocol matching B . to discover applications and build class maps for data classification C . to look into the TCP or UDP payload and classify packets based on the content D . to build a database of all application data that passes through the router and queue the data accordingly

A . to configure a subinterface so that it can be applied to the primary interface in order to prevent exponential selective dampening B . to suppress the effects of excessive interface flapping events on routing protocols and routing tables in the network C . to introduce a nonconfigurable exponential delay mechanism D . to allow the network operator to configure a router to automatically dampen and selectively identify a local interface that is failing

A .  Make backups faster B .  Store RMAN metadata C .  Store RMAN scripts D .  Provide the ability to do centralized backup reporting E .  Make recovery faster

A . Provides surface for applying force on machinery B . Provides landing surface for the sounding bob C . Absorbs machinery vibration D . Prevents valve stem over-travel

A .  To determine the correct IOS image to support your modules or blades B .  To allow for the mass deployment of devices with minimal configurations. C .  To test router configurations virtually prior to implementing them in your production network D .  To provide an easy way to check for known bugs in IOS releases E .  To verify that hardware such as modules are compatible with your chassi

A .  Recover database datafiles from physical disk backup sets. B .  Recover required incremental backups from physical disk backup sets. C .  Recover required archived redo logs from physical disk backup sets. D .  Apply incremental backups to recover the database.  E .  Apply archived redo logs to recover the database.

A . Serves as a backup for the main tow hawser in case of failure B . Provides weight and flexibility to the total tow makeup C . Lengthens the main tow hawser to keep the tow in step D . Distributes the towing load

A . to map a known DLCI to an IP address B . to map a known IP address to a MAC address C . to map known SPID to a MACaddress D . to map a known DLCI to a MAC address E . to map a known IP address to a SPID F . to map a known MAC address to an IP addre

A．To welcome health care professionals B．To promote certain health services C．To discuss health workforce shortages D．To promote careers in health care

A．To entertain. B．To persuade. C．To instruct. D．To inform.

A．To compare guided tours B．To discover new places of interest C．To introduce a book series D．To show ways of writing for children

A.To advertise their spray. B.To advertise their new shoes. C.To complain the bad quality of the shoes. D.To answer the complaint.

A．To point out similarities in Emerson"s essays and poems B．To prepare the students to read an essay by Emerson C．To compare Emerson"s concept of universal truth to that of other authors D．To show the influence of early United States society on Emerson"s writing 此题为多项选择题。

A．To invite people to take a breath in the Bay of Naples. B．To advise people to telephone Newmarket Air Holidays Ltd. C．To persuade people to tour in the area of the Mediterranean Sea. D．To attract people to go to Sant' Agata or Sorrento for sightseeing.

A．To inform. employees of a rescheduled event B．To report on the achievement of an employee C．To announce the release of a new product D．To introduce a new engineer to the staff

A．To reschedule a trip B．To confirm an appointment C．To request a payment D．To inquire about a special offer

A．To publicize a community event B．To solicit donations for a special cause C．To ask for public feedback on a proposal D．To announce a program change

A．To outline contrasting types of economic system. B．To explain the science of economic systems. C．To argue for the superiority of one economic system. D．To compare barter and money-exchange markets.

A．To advise that TV should be used for educational purpose B．To describe the harmful effects of TV on children C．To explain traditional views of influences that TV has had on children D．To suggest that television cannot be blamed for problems it doesn't cause