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●Most frequently used algorithm for page replacement is (67) .
(67) A．LRU
B．FIFO
C．OPT
D．PPT
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● The sorting method described by the code is called (67) ．(67) A．Insertion sortB．Selection sortC．Radix sortD．Merge sort
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●Melissa and Love Letter made use of the trust that exists between friends or colleagues.Imagine receiving an (66) from a friend who asks you to open it.This is what happens with Melissa and several other similar email (67) .Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book,previous emails, web pages (68) .As administrators seek to block dangerous email attachments through the recognition of well-known (69) , virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the (70) access to your network.(66) A．attachmentB．packetC．datagramD．message(67) A．virtualB．virusC．wormsD．bacteria(68) A．memoryB．cachesC．portsD．registers(69) A．namesB．cookiesC．softwareD．extensions(70) A．crackerB．userC．customerD．client
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●In the following essay，each blank has four choices．Choose the most suitable one from the four choices and write down in the answer sheet．Open Shortest Path First(OSPF)is a (66) routing algorithm that (67) work done on the OSI IS-IS intradomain routing protocol．This routing，as compared to distance-vector routing，requires (68) processing power．The Dijkstra algorithm is used to calculate (69) OSPF routing table updates only take place when necessary， (70) at regular intervals．(66) A．distance-vectorB．link-stateC．flow-basedD．selective flooding(67) A．derived fromB．deviated fromC．was derived fromD．was deviated from(68) A．moreB．lessC．sameD．most(69) A．routesB．roadC．distanceD．cost(70) A．but ratherB．rather tooC．rather thanD．rather that
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Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an(66)from a friend who asks you to open it. This is what happens with Melissa and several other similar email(67).Upon running, such worms usually proceed to send themselves out to email addresses from the victim' s address book ,previous emails, web pages(68).As administrators seek to block dangerous email attachments through the recognition of well- known (69), virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to . bat and . cnd plus a whole list of other extensions and will still run and successfully infect target users. Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the(70)access to your network.A．attachmentB．paeketC．datagramD．message
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半圆头铆钉的国家标准代号是（）。A．GB867-67B．GB868-67C．GB869-67D．GB954-67
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