NOTES
　　[1]  be fond of doing…是短语“乐于……，喜欢……”；call computers machines意为“把计算机称为机器”。
　　[2] because后的原因状语从句，由makes和calls带出的两个并列分句组成。Calls into operation each unit中的双宾语倒装，正常语序为calls 　　each unit into operation。原意为“传唤各部件进行操作”，这里指微操作，实际上是指“完成微操作”。
　　[3] 这是一个and连接的并列句。后一个分句中的whatever是关系代词，引导后面的宾语从句。

　　KEYWORDS
　　instruction        指令      
　　clock                时钟
　　instruction set        指令系统，指令集   
　　megahertz（MHz）        兆赫
　　processor        处理器     
　　control unit        控制器，控制部件
　　operation        操作、操作码、操作码指令 
　　arithmetic and logic unit（ALU）算术/逻辑部件
　　operand         操作数     
　　word size（word length)字长
　　register        寄存器     
　　machine Ianguage       机器语言

　　EXERCISES
　　1．Match the following terms to the appropriate definition．
　（1）_____ Processor．  
　（2）_____ Instruction set． 
　（3）_____Clock．   
　（4）______Machine language.      
　（5）______Operation．  
　（6）______Operand．
　（7）______Megahertz（MHz）．
　（8)______Control unit．
　（9）______Arithmetic and logic unit（ALU）．
　（10______Register．
　（11______Word size．

　　a．The part of an instruction that specifies the function that is to be performed．
　　b．The binary language in which a computer’s instruction set is written．
　　c． A timer in a processor that releases precisely timed signals that provide a pulse for the processor’ s work．
　　d．A functional unit that interprets and carries out instructions．
　　e．A unique set of operations that comes with every processor．
　　f．The part of an instruction that tells where data that are operated on are located．
　　g．Million cycles per second．
　　h．The function unit that is responsible for supervising the operation of the entire computer system．
　　i．A function unit that provides the computer with logical and computational capability．
　　j．The term used to describe the size of operand registers and buses．
　　k．A storage location inside the processor．

　　2．Fill in the blanks with appropriate words or phrases
　（1）We usually call our computers ______．
　（2）An instruction set can sometimes be referred to as ______．
　（3）The binary language is called ______．
　（4）We don’t confuse the processor’s instruction set with the instructions of ______．
　（5）An instruction consists of ______．
　（6）An operand that refers to data in the memory is called an______ ．
　（7）A timer can give precisely timed ______．
　（8）A processor includes two functional units，they are ______．
　（9）The ways by which the control unit works are analogous to______．
　（10）The control unit takes out the ______from memory．
　　a．address         b．high-level programming languages
　　c．instructions         d．machines
　　e．electrical signals        f．machine instructions
　　g．a telephone switch-board with intelligence  h．operations and operands
　　i．machine language       j．control unit and ALU

　　1．（1）d  （2）e （3）c  （4）b（5）a  （6）f  （7）g（8）h（9）i （10）k （11）j
　　2．（1）d  （2）f  （3）i  （4）b（5）h  （6）a  （7）e （8）j（9）g （10）c