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对移动臂硬磁盘来说，移臂调度的目的是将移动臂移动到 (11) 。对磁盘的驱动调度来说，旋转调度的目的是 (12) 。常用移臂调度算法有先来先服务、最短寻找时间优先和 (13) 。磁盘上的文件以 (14...
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对磁盘进行移臂调度时既考虑了减少寻找时间又不频繁改变移动臂的移动方向的调度算法是
先来先服务
最短寻找时间优先。
电梯调度
优先级高者优先
对于移动臂磁盘磁头在移动臂的带动下移动到指定柱面的时间称为【6】时间
在磁盘调度管理中应先进行移臂调度再进行旋转调度若磁盘移动臂位于22号柱面上进程的请求序列如下表
②⑧③④⑤①⑦⑥⑨
②⑧③⑤⑦①④⑥⑨
①②③④⑤⑥⑦⑧⑨
②③⑧④⑥⑨①⑤⑦
对于移动臂磁盘磁头在移动臂的带动下移动到指定柱面的时间称为【8】时间
测量肘关节的活动度量角器的轴心置于
肱骨内上髁，固定臂与桡骨平行，移动臂与肱骨平行
肱骨内上髁，固定臂与桡骨平行，移动臂与肱骨纵轴平行
肱骨外上髁，固定臂与肱骨纵轴平行，移动臂与桡骨平行
肱骨内上髁，固定臂与桡骨垂直，移动臂与肱骨纵轴平行
肱骨外上髁，固定臂与桡骨平行，移动臂与肱骨纵轴平行
对移动臂硬磁盘来说移臂调度的目的是将移动臂移动到11对磁盘的驱动调度来说旋转调度的目的是12常用移臂
指定柱面
0柱面
0扇区
指定扇区
在磁盘调度管理中应先进行移臂调度再进行旋转调度若磁盘移动臂位于22号柱面上进程的请求序列如下表
4.11
5.56
12.5
13.22
在磁盘调度管理中应先进行移臂调度再进行旋转调度若磁盘移动臂位于22号柱面上进程的请求序列如下表
4.11
5.56
12.5
13.22
对移动臂硬磁盘来说移臂调度的目的是将移动臂移动到11对磁盘的驱动调度来说旋转调度的目的是12常用移臂
顺序存取
随机存取
以字节为单位存取
直接存取
对于移动臂磁盘磁头在移动臂的带动下移动到指定柱面的时间称为______时间
测定肘关节的屈伸时关于通用量角器放置位置下列哪项正确
轴心： 鹰嘴； 固定臂： 前臂纵轴； 移动臂： 桡骨纵轴
轴心： 肱骨外上髁； 固定臂： 肱骨纵轴； 移动臂： 桡骨纵轴
轴心： 肱骨外上髁； 固定臂： 桡骨纵轴； 移动臂： 肱骨纵轴
轴心： 鹰嘴； 固定臂： 肱骨纵轴； 移动臂： 桡骨纵轴
轴心： 肱骨外上髁； 固定臂： 腋中线； 移动臂： 桡骨纵轴
对移动臂硬磁盘来说移臂调度的目的是将移动臂移动到11对磁盘的驱动调度来说旋转调度的目的是12常用移臂
块
记录
柱面
磁道
对磁盘进行移臂调度时既考虑了减少寻道时间又不频繁改变移动臂的移动方向的调度算法是21
最短寻道时间优先
优先级高者优先
电梯调度
先来先服务
在磁盘调度管理中应先进行移臂调度再进行旋转调度若磁盘移动臂位于22号柱面上进程的请求序列如下表
②⑧③④⑤①⑦⑥⑨
②⑧③⑤⑦①④⑥⑨
①②③④⑤⑥⑦⑧⑨
②③⑧④⑥⑨①⑤⑦
在磁盘调度管理中应先进行移臂调度再进行旋转调度若磁盘移动臂位于22号柱面上进程的请求序列如下表
②⑧③④⑤①⑦⑥⑨
②⑧③⑤⑦①④⑥⑨
①②③④⑤⑥⑦⑧⑨
②③⑧④⑥⑨①⑤⑦
对于移动臂磁盘磁头在移动臂的带动下移动到指定柱面的时间称_________时间而指定 扇区旋转到磁头
对于移动臂磁盘磁头在移动臂的带动下移动到指定的时间称为时间
在磁盘调度管理中应先进行移臂调度再进行旋转调度若磁盘移动臂位于22号柱面上进程的请求序列如下表
4.11
5.56
12.5
13.22
若磁盘共有8个柱面0～7磁盘的移动臂每移 动一个柱面的距离需要20ms每次访问磁盘的旋 转延迟时间和
对移动臂硬磁盘来说移臂调度的目的是将移动臂移动到11对磁盘的驱动调度来说旋转调度的目的是12常用移臂
将移动臂移动到指定柱面
将移动臂移到0柱面
将磁头移动到指定扇区
将磁头移动到0扇区
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Packet-switchingwirelessnetworksarepreferable41whentransmissionsare42becauseofthewaychargesare43perpacket.Circuit-switchednetworksarepreferablefortransferringlargefilesorforotherlengthytransmissionsbecausecustomersare44forthe45oftimetheyusethenet-work.
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MultipurposeInternetMailExtensionMIMEisa46documentmessagingstandardintheInternetenviromentwithMIMEuserscansend47Emailmessagesthatincludeaudiovideograph-icesandtexttoanyotheruserofaTCP/IPnetwork.Richtextinformationcanalsobe48intomessages.Itdefinesthefontsformatsand49featuresofadocumentsothedocumentcanbeeasily50onmanydifferenttypesofsystems.
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Inthefollowingessayeachblankhasfourchoices.Choosethemostsuitableonefromthefourchoicesandwritedownintheanswersheet.Asocketisbasicallyanendpointofacommunicationlinkbetweentwoapplications.Socketsthatextendoveranetworkconnecttwoormoreapplicationsrunningon31computersattachedtothenet-work.Asocket32twoaddresses:33.Socketsprovidea34communicationchannelbetweenoneormoresystems.Thereare35socketsseparatelyusingTCPandUDP.
56isaone-wayfunctionthattakesanarbitrarilylongpieceofplaintextandfromitcomputesafixed-lengthbitstring.57isaprotocolthatmostUSENETmachinesnowuseittoallownewsarticlestopropagatefromonemachinetoanotheroverareliableconnection.58isanapproachpreferredbycableTVproviders.Inthissolutionthefiberterminatesatanopto-electricalconverterandthefinalsegmentisasharedcoaxialcable.59isadeviceusedtoconnecttwoseparatenetworkthatusedifferentcommunicationprotocol.60isadigital-to-digitalpolarencodingmethodinwhichthesignallevelisalwayseitherpositiveornegative.
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