科技英语写作高级教程(第二版)参考答案.doc

1、V、练习参考答案 练习1I、1、the（各项均为负。) 2、the; a （功率额定值是电阻器不会引起温度太大的上升而能安全地耗散的最大功率。） 3、an（这是均方根值伏特计。） 4、The; a（该设备的成功设计需要详细地了解性能指标。） 5、the; a; a（在氢原子的布尔模型中，一个电子绕一个质子以半径为R的圆周运转。） 6、the（电阻的单位是欧姆。） 7、an （这是一个h参数。） 8、/; /（图51画出了Oersted的实验。） 9、A; a; a（机器是能够传递力来完成某一确定目的的一种设备。） 10、/（水压机将在第14章加以考虑。） 11、the; the /（我们容易确

2、定参数的值。） 12、/; the（根据式（21），我们得到以下的关系式。） 13、the; /（作者工作在位于阿林顿的得克萨斯大学。） 14、an（甚至当积分区间并不是无穷时，能够恰当地显示一个时函数的傅氏变换的仪器是多么重要啊！）II、1. Dr. Emmet graduated from Harvard University in 2001.2. Professor Li earned his Ph.D. degree in mechanical engineering from the Xian University of Technology in 1988.3. Now we sh

3、all turn to the discussion of local area networks.4. The Bainbridge mass spectrometer is as important an instrument as the optical spectrometer.5. How long a time 或How much time is required to this experiment? The density of a substance is its mass per unit volume.6. An increase in pressure always c

4、auses a decrease in volume.7. Fig. (2-5) shows what is expressed by Eq. (2-2).8. The unit of inductance is the henry.III、1. The UASMA protocol employs a unique frame structure.2. Finally, a broad stepped impedance transformer is designed by this method.3. Dynamic analysis and evaluation of the secur

5、ity of a proactive secret sharing system4. The approach can be applied to the one-dimensional potential barrier with an arbitrary profile.5. We propose a numerical method based on Newtons iterative method. 练习2I、1. This circuit consists of a battery, an inductor and a capacitor.2. Compute the electri

6、c fields at points a, b, and c.3. This satellite is used for communications between the United States and Great Britain, France and Italy.4. We assume that the antenna is vertical and that its loss is zero.5. Chapters 6, 7, and 8 deal with transmission lines.II、1. Its error is six parts in 1012.2. T

7、his computer stores four times more information than that one (does).3. The demand for this kind of equipment in the near future will be 20 times what it is.4. The voltage across this component is a few tenths of a volt.5. Now its internal pressure is one third what it was.III、1. This object is over

8、 five times heavier than that one is.2. Unless otherwise stated, it is assumed that silicon transistors are used and that ICBO can be neglected.3. This circuit has the advantages of simple structure and easy adjustment.4. Figs. 1, 2, and 3 show this process in detail.5. For further information, cons

9、ult references 3, 5, 9. 练习3I、 1. This new type of computer has many advantages over the general type.2. It is not difficult to solve this differential equation for the unknown quantity. 3. Of these five new chapters, the first one deals with the basic principles of negative feedback.4. At this point

10、/time, current differs in phase from voltage by 90o.5. By analyzing By the analysis of the parameters of the instrument, we can understand its performance.6. We will find out its average velocity over this distance.7. The science of electronics is too important in the world today. 8. They solved thi

11、s problem with great difficulty.II、 1. For x1, there is no solution to this equation this equation has no solution.2. Upon On substituting substitution of these values into in theequation, we obtained the following expression.3. This circuit is similar in operation to that of Fig. 1-10.4. This compu

12、ter is very good in performance. 5. These waves travel only in one direction.III、 1. This paper presents a new method for the recognition of radar targets.2. The influence of the moving state of the target on the tracking accuracy of the EKF is great.3. Another comsat was launched on the morning of

13、the 8th of October.4. Voltage is measured in volts.5. They will leave for Beijing to attend an international conference on mobile communication.6. Unless otherwise stated, it is assumed that silicon transistors are used and that ICBO can be neglected.7. 练习4I、 1. The force acts perpendicular to the s

14、urface of the table.2. The three coefficients here remains to be determined.3. The two equations below will be often (frequently) used in later chapters/in the chapters which follow.4. Here we use two metal balls 10 cm apart.5. The output remains/stays constant/unchanged/fixed/unaltered/the same. 6.

15、 All the textbooks available discuss this problem.7. Accurate in operation and high in speed, computers have found wide applications.8. The answer to this problem looks correct. 9. Two parallel wires a distance (of)apart carry the current i. 10. The problem now is how to measure the voltage across this component. 11. These data will be sent to the computing center 2 kilometers away. 12. Upon rearranging the equation above, we have get, ob