出卷老师： 侯 海 虹 适用班级： Y101091, Y101092 院（系） 物理与电子工程学院 班级 学号（9 位） 姓名 阅卷密封装订线第 1 页/共 3 页常熟理工学院 20102011 学年第 二 学期专业英语考试试卷试题总分： 100 分 考试时限：120 分钟题号 一 二 三 总分 阅卷人 核分人得分二、英译汉（共30分）Neither have the energy out of thin air, it will not suddenly disappear, it can only be converted （转化）from one form into other forms, or from one object (物质) to another object, the conversion or transfer (转移) process, the same amount of energy. This is the law of energy conservation (守恒) , it is widely recognized (认同) now.The energy conservation law is most common（普遍的） in nature, and it is one of the most important fundamental (基本的) laws. From physics, chemistry to geology, biology, large celestial bodies (宇宙天体), small nucleus (原子核 ) inside, as long as energy conversion, it must obey the law of conservation of energy. From daily life to scientific research, engineering, this law has played an important role. A variety of (各种各样的) human energy, such as coal, oil (石油) and other fuels (燃料) and hydropower, wind energy, nuclear energy (核能) use, are all achieved through energy conversion. The energy conservation law is a powerful weapon for people to understand and use the nature.On the latest research of the energy conservation law, researchers believe that energy conservation requires conditions, it is not universal (普遍适用的), and that the time translation invariance (时间平移不变性) is the condition of conservation of energy. 阅卷密封装订线第 2 页/共 3 页二、英译汉One of the key inventions in the history of electronics, and in fact one of the most important inventions over period （人类历史上的）, was the transistor. It was invented by Bell Laboratories in 1948. In short, a transistor is a device that conducts （传导） a variable amount of electricity （可变电量）through it, depending on how much electricity is input to it. In other words, it is a digital switch （开关）. However, unlike the vacuum tube （真空管） , it is solid state. This means that it doesnt change its physical form as it switches （改变状态） . There are no moving parts in a transistor.The advantages of the transistor over the vacuum tube were enormous （巨大的）. Compared to the old technology, transistors were much smaller, faster, and cheaper to manufacture. They were also far more reliable （可靠的） and used much less power. The transistor is what started the evolution of the modern computer industry in motion.The transistor was originally （最初地） a single, discrete device, which you could place individually （单独地） into a circuit much like any other. Today, some special-purpose （特殊用途的）transistors are still used that way. What allowed the creation of modern processors （现代处理器） was the invention of the integrated circuit （集成电路）, which is a group of transistors manufactured from a single piece of material and connected together internally （内部地）, without extra wiring （外部连线） . Integrated circuits are also called ICs or chips.A special material is used to make these integrated circuits. While most materials either insulate （绝缘） from electrical flow (air, glass, wood) or conduct electricity readily （容易地）(metals, water), there are some that only conduct electricity a small amount, or only under certain conditions. These are called semiconductors. The most commonly used semiconductor is of course silicon （硅）.By careful chemical composition and arrangement （设计）, it is possible to create a very 阅卷密封装订线第 3 页/共 3 页small transistor directly on a layer of silicon, using various technologies to manipulate the material into the correct form. These transistors are small, fast, and reliable, and use relatively little power. The first integrated circuit was invented in 1959 by Texas Instruments. It contained just six transistors on a single semiconductor surface. After the invention of the integrated circuit, it took very little time to realize the tremendous（巨大的） benefits （好处） of miniaturizing （缩微化） and integrating （集成） larger numbers of transistors into the same integrated circuit. More transistors (switches) were required in order to implement （实现） more complicated （复杂的） functions. Miniaturization was the key to integrating together large numbers of transistors while increasing hardware speed and keeping power consumption and space requirements manageable.Large-scale integration (“LSI”) came to refer to the creation of integrated circuits that had previously been made from multiple discrete components. These devices typically contained hundreds of transistors. Early computers were made from many of these small ICs connected together on circuit boards （电路板）.As time progressed after the invention of LSI integrated circuits, the technology improved and chips became smaller, faster and cheaper. Building on the success of earlier integration efforts （成果）, engineers learned to pack more and more logic