若每一条指令都可以分解为取指，分析和执行三步。已知取指时间t_取指=8△t，分析时间t_分析＝3△t，执行时间t_执行＝12△t。如果按照流水线方式执行指令，从头到尾执行完 100条指令至少需(41) △t。如果取指时间t_取指=8△t，分析时间t_分析＝12△t，执行时间 t_执行＝3△t，则从头到尾执行完100条指令至少需(42)△t。

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  Remote administration types are an example of one kind of(71)malicious software, the Trojan horse, or more simply Trojan. The purpose of these programs isn't replication,(72)to penetrate and control. That masquerade as one thing when in fact they are something else, usually something destructive. There are a number of kinds of Trojans, including spybots, (73) report on the Web sites a computer user visits, and keybots or keyloggers, which record and report the user's keystrokes in order to discover passwords and other confidential information.

 RATS attempt to give a remote intruder administrative control of an infected computer. They work as(74)pairs. The server resides on the infected machine, while the client resides elsewhere, across the network, where it's available to a remote intruder. Using standard TCP/IP or UDP protocols, the client sends instructions to the server. The server does(75) it's told to do on the infected computer.

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现需要一个32M×8规格的存储器，现只有规格为1M×8的存储器芯片，则需要(49)个这样的存储器芯片。存储芯片的地址长度需要(50)位，主存储器的地址长度需要(51)位。

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