The key functions of lubricants include （).

A . can be used over analog circuits B . maps Layer 2 to Layer 3 address C . encapsulates several routed protocols D . supports IP only E . provides error correctio

A . It accepts both a built-in and a key name as argument.  B . If no key trigger is defined, the specified built-in executes.  C . Its parameter must be specified in upper case, enclosed in single quotation marks.  D . It performs the same task as if you pressed the function key associated with the specified argument.  E . It executes the key trigger that corresponds to the built-in specified as its parameter.&e

A . reduce the rolling of the vessel B . serve as the vessel's main strength member C . add strength to the bilge D . protect the vessel's hull when alongside a dock

A . DB2 will no longer allow updating the value of IDCOL1 in TABLE1. B . When inserting a row in TABLE2, the only values that DB2 will allow for IDCOL2 are the existing values of IDCOL1. C . When inserting a row in TABLE2, DB2 will only allow foreign values for IDCOL2, that is values which do not exist in IDCOL1. D . When a SELECT statement joins TABLE1 with TABLE2, DB2 will automatically add the condition TABLE1.IDCOL1=TABLE2.IDCOL2 if not specified in the statement.

A . Identify the activities involved in installing and configuring equipment at a customer’s site or sites B . Describe the day-to-day activities required to support， manage， and monitor a newly implemented system C . Access current network readiness， site readiness， and operational readiness in preparation for designing a solution proposal D . Gain an understanding of high-level business and technical requirement

A . refreshing the air B . making person upset C . adjusting the air humidity D . adjusting the air temperature

A . Evidence of the contract B . A receipt for the goods C . A document of title D . Evidence of the ship being seaworthine

A . Lube oil pressure and temperature B . jacket water pressure and temperature C . Engine over-speed D . Lube oil sump level

A . Prevents lateral movement of the slow speed gear B . Transmits propeller thrust to the hull C . Keeps spring bearings in line D . Prevents main reduction gear axial movement

A、Be familiar with the route B、Master some knowledge of the natural sciences C、Master some  knowledge of literature D、Know some cultural knowledge E、Flexible use of interpreting skills

A．To stop hackers from stealing your personal information. B．To disconnect your PC from the Internet when it is being attacked. C．To keep hidden software in your computers from leaking valuable information. D．To block hostile cookies and bugs from being planted on your computers.

A．A.headstock B．B.carriage C．C.tailstock D．D.chunk

A．3NF B．2NF C．INF D．BCNF

A．For humor as well as reaffirming the difficulty with dressing for a big date. B．For indicating the author's embarrassment about how to dress. C．For opposing to so many dates among boys and girls. D．For disagreeing to the complexity of human dressing. 此题为多项选择题。