Changing oils and filters are ____ maintenance steps.

A . Your filter class must implement an init method and a destroy method. B . Your filter class must also implement javax.servlet.FilterChain. C . When your filter chains to the next filter， it should pass the same arguments it received in its doFiltermethod. D . The method that your filter invokes on the object it received that implements javax.servlet.FilterChaincan invoke either another filter or a servlet. E . Your filter class must implement a doFilter method that takes， among other things， anHTTPServletRequest object and an HTTPServletResponse object.

A . Ⅰ only B . Ⅱ only C . either Ⅰ or Ⅱ D . neither Ⅰ or Ⅱ

A . when B . how C . where D . whether

A . centrifuging B . pressurizing C . atomization D . igniting

A . under high pressure B . under low pressure C . heated to reduce viscosity D . cooled to increase viscosity

A . a strain tank B . a head tank C . a service tank D . a strainer

A . allow filtration of less viscous oil B . decrease the pressure drop across the filter C . improve overall filtration D . all of the above

A . low compression B . air-bound fuel system C . improper spark D . change in viscosity

A . A neighbor distribute - list out command, referencing a standard ACL B . A neighbor prefix - list out command C . A neighbor filter - list out command D . A neighbor distribute - list out command, referencing an extended ACL E . A neighbor route - map out command

A . AC B . DC C . generator D . fresh water generator

A . Ⅰonly B . Ⅱonly C . eitherⅠorⅡ D . neitherⅠnor

A . viscosity is too low B . temperature is too low C . pump discharge pressure is higher than the systems pressure D . pump capacity is greater than the systems need

A . loss of power B . misfiring C . low fuel oil pressure D . All of the above

A . BPDU port-guard can be enabled globally， whereas BPDU filtering must be enabled on a per-interface basis. B . When globally enabled， BPDU port-guard and BPDU filtering apply only to PortFast enabled ports. C . When globally enabled， BPDU port-guard and BPDU filtering apply only to trunking-enabled ports. D . When a BPDU is received on a BPDU port-guard enabled port， the interface goes into the err-disabled state. E . When a BPDU is received on a BPDU filtering enabled port， the interface goes into the err-disabled state. F . When a BPDU is received on a BPDU filtering enabled port， the interface goes into the STP blocking state.

A . fuel oil pump will over-speed if dirt is not removed B . fuel oil transfer pumps cannot tolerate small amounts of dirt in the oil C . fuel injectors may be damaged by foreign particles in the fuel oil D . dirty fuel will clog the intake air filter

A . visual inspection of the elements B . the pressure drop across the filter C . high lube oil sump temperature D . decrease in oil viscosity from the filter

A . determine the need for filter cleaning B . measure any change in oil viscosity C . prevent damage to the filter D . determine the need for batch filtratio

In Australia- where an aging population, life-extending technology and changing community attitudes have all played their partother states are going to consider making a similar law to deal with euthanasia.(英译中)

A．I B．I．II．III C．II．III D．II

A.as such B.so such C.such are D.so are

A．A.concurrent control B．B.feedforward control C．C.definitional control D．D.feedback control E．E.projected control

A．better B．the better C．the best D．best

But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 percent that is irrelevant, instantaneously focusing on the monkey at the side of a winding forest road or the single suspicious face in a big crowd.