2. 计算机
  3. In　recent　years,　one　of　the　more　popular　topics　for　panel　discussions　at　computer　conferences　and　trade(61)has　been　the　"RISC　ve

In　recent　years,　one　of　the　more　popular　topics　for　panel　discussions　at　computer　conferences　and　trade(61)has　been　the　"RISC　ve

admin2009-05-15  3
问题 In　recent　years,　one　of　the　more　popular　topics　for　panel　discussions　at　computer　conferences　and　trade(61)has　been　the　"RISC　versus　CISC"　debate.RISC　processors　feature　a　small　number　of　instructions　that　each　executes　in(62)machine　cycle.　CISC　processors　use　complex　instructions　that　can　take　several　cycles　to　execute.The　RISC　versus　CISC　debate　won’t　be　decided　by　panel　discussion;　it　will　be　won　in　the　marketplace.　And　the　deciding　factor　may　have　little　to　do　with(63)of　instructions　and　registers　and　more　to　do　with　parallelism.Since　their　conception,　RISC　processors　have　been　evolving　toward　micro　parallelism,　incorporating　parallel-processing　features(64)the　processor,　RISC　processors　feature　pipelining,　whereby　many　instructions　can　be　decoded　while　one　instruction　executes.　RISC　processors,　however,　are　moving　toward　pipelines　for　each　unit　of　the　processor.CISC　processors　also　employ　pipelining.　They　have　many　integer　instructions　that　execute　in　one　cycle,　but　the　varying　execution　times　of　CISC　instructions(65)the　effectiveness　of　parallelism.
选项 A、shows
B、two
C、numbers
D、between
E、limit
答案A
解析
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