Unit 3 A. Text,Circuits,New Words and Expressions,battery 5bAtEri n. 电池 load loud n. 负载 conversion kEn5vE:F(E)n n. 转换 negative 5negEtiv adj. 负的 positive 5pCzitiv adj. 正的 cell sel n. 电池 pathway 5pB:Wwei n. 通路,径,上页 下页 返回 结束,regenerative ri5dVenErEtiv adj. 再声的; 反馈的 filament 5filEmEnt n. 灯丝 minus 5mainEs adj. 负的 plus plQs adj. 正的 advantageous AdvEn5teidVEs adj. 先进的, 有利的,上页 下页 返回 结束,Technical Terms,source supply / power supply 电源 negative terminal 负极 positive terminal 正极 dry cell 干电池 series circuits 串联电路 parallel circuits 并联电路,Notes,1. But if the pathway be ever broken 但是如果该通路一旦断开， 句中谓语 be broken 是虚拟语气，表示将来有可能实现的一种设想，用动词原形表示；ever 在这里加强语气。 2. In everyday electric work we very often deal with circuits where the current branches between two or more paths. 在日常电工中，我们最常见的是分成两个或两个以上的分流电路。 Where 是关系副词，引导定语从句，在从句中作状语；deal with 意为：处理，翻译时引伸了其词义；branch 在句子中做动词，意为：分成。,3. . each lamp filament representing an independent path from the minus main wire to the plus wire. 每盏灯代表一条从主要线路的负极到正极的独立通路或分路。 该部分为分词的独立结构形式，用作状语。each lamp filament 为分词短语的主语。,4. Such circuits make it possible to combine the different voltage characteristic of a series circuit with the different current characteristic of a parallel circuit within a single network. 这种电路能够把串联电路的不同电压与并联电路的不同电流特征结合在一个网路内。 句中 make it possible 中的it为形式宾语；to combine the different voltagewithin a single network 是真正的宾语。,I. Choose the one that best completes each of the following statements according to the text: 1. Power supply, the conductor, the control device and _ are four basic parts of an electric circuit. A. battery B. wire C. switch D. load 2. The energy conversion can take place _. A. in the circuit B. in a cell C. within the load D. along the wire 3. Electric circuit is a combination of a conductor and of a source of e.m.f. which permits electrons to flow along a _. A. stream B. wire C. terminal D. pathway 4. The electrons move in a fixed way in a _ direction. A. definite B. different C. various D. appropriate,Exercises,D,C,B,A,5. The electric current flows from _ to _. A. negative , positive B. positive, negative C. minus, plus D. A and C 6. When the current flows, it is a _ circuit. A. closed B. open C. combination D. electric 7. When the circuit is broken anywhere, the circuit will stop carrying a _. A. stream B. current C. terminal D. light 8. An electric circuit consists of _. A. conductor B. current C. e.m.f. D. all above,D,A,B,B,II. Try to match the following columns:,1.a closed circuit minus 2.as a matter of fact cell 3.an open circuit be composed of 4.negative a circuit which was broken 5.positive in fact 6.consist of a circuit that the current can flow through 7.battery plus,1.a circuit that the current can flow through 2.in fact 3.a circuit which was broken 4.minus 5.plus 6.be composed of 7. cell,B. Reading Integrated Circuits New Words and Expressions substrate 5sQbstreit n. 衬底; 基片 assembly E5sembli n. 组件 wafer 5weifE n. 晶片 counter 5kauntE n. 计数器 inseparably in5sepErEbli adv. 不能分离地 simultaneously sImEl5teInIEsly adv. 同时(发生)地,stripe straip n. 条纹 dissipation 7disi5peiFEn n. 消耗，消散 Technical Terms film technique 薄膜技术 frequency synthesizer 频率合成器 monolithic technique 单片技术 operational amplifier 运算放大器,Exercises,Decide whether the following statements are true or false: 1.An IC can only include one type of components. 2.Resistors and transistors can be connected on one wafer and perform the same function. 3.All the components on the wafer are called integrated elements. 4.ICs are termed an interconnection of components. 5.An IC can only perform a special function. 6.ICs are smaller in volume and expensive in price.,F F F F F F,