1、科技英语写作高级教程参考答案docx科技英语写作高级教程参考答案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 5,1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
2、设备。 )10、/( 水压机将在第 14 章加以考虑。 )11、the; the /(我们容易确定参数 的值。 )12、/; the(根据式 (2,1) ,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 engineeringfrom th
3、e Xi anUniversity of Technology in 1988.3.Now we shall turn to the discussion of local area networks.4.The Bainbridge mass spectrometer is as important an instrument as the opticalspectrometer.5.How long a time 或 How much time is required to this experiment? The densityof a substance is its mass per
4、 unit volume.6.An increase in pressure always causes 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.Dy
5、namic analysis and evaluation of the security of a proactive secret sharingsystem4.The approach can be applied to the one-dimensional potential barrier with anarbitrary profile.5. We propose a numerical method based on Newton s iterative method.练习 2I、1.This circuit consists of a battery, an inductor
6、 and a capacitor.2.Compute the electric 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、121
7、. Its error is six parts in 10.2.This 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 sixteenth wha
8、t it was.III、1.This object is over five times heavier than that one is.2.Unless otherwise stated, it is assumed that silicon transistors are used and that I CBOcan 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
9、.For further information, consult references 3, 5, 9.练习 3I、1.This new type of computer has many advantages over the generaltype.2.It is not difficult to solve this differential equation for theunknown quantity.3.Of these five new chapters, the first one deals with the basic principles of negative fe
10、edback.o4. At this point/time, current differs in phase from voltage by 90.5.By analyzing By the analysis of the parameters of the instrument, we canunderstand 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.
11、8.They solved this problem with great difficulty.II、1.For x,1, there is no solution to this equation this equation has no solution.2.Upon On substituting substitution of these values into intheequation, we obtained the following expression.3.This circuit is similar in operation to that of Fig. 1-10.
12、4.This computer 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.th3. Another comsat was launched on the mo
13、rning of the 8 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 I can be neglected. CBO7.练习 4I、1.The force acts perpendicular to th
14、e surface 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 thechapters which follow.4.Here we use two metal balls 10 cm apart.5.The output remains/stays constant/unchanged/fixed/unaltered/thesame.6.All
15、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 (o f) apart carry the current i.10.The problem now is how to measure the voltage across this co
16、mponent.11.These data will be sent to the computing center 2 kilometersaway.12.Upon rearranging the equation above, we have get, obtain thefollowing expression.13.These charges can interact with other charges present.14.Forces can be transmitted without contact, contrary to the common belief.15.This
17、 coefficient is typically 0.35.II、1.In this case, the input does not fall; nor neither does the output. ; the output does not fall, either.2.The resistance of a conductor depends not only on the material of which theconductor is made, but also on the size and temperature of the conductor.3.These sci
18、entists are very interested in this topic.4.This parameter can hardly be measured.5. In this laboratory, this instrument is more expensive than any other one/ any oneelse.6. The features of this device are small size and light weight.练习 5I、1.This equation can be solved in either of the following two
19、 ways/the two wayswhich follow.2.This baseball will soon come to rest because of its interaction with the ground.3.Our choice of this coefficient as 1 is correct.4.From its definition as the ratio of a force to a length, we can see that k has thesame unit as work (does).5.Our analysis of the machine
20、 is of great significance.6.This facilitates their use in circuit analysis.II、1.This police car is equipped with a receiver the size of a matchbox.2.Wires one hundredth the diameter of a silk thread are used to connect thesecomponents.3.We must water cool these equipments/devices.4.In the past, tele
21、phone calls were operator connected.5.AC can be changed/turned/converted/transformed/translated into/toDC, aprocess called/known as/referred to as rectification.6.A magnet attracts iron materials, a familiar phenomenon.7.Computers are capable of processing information, a process that previouslycould
22、 be accomplished only inside our heads.8.An instrument for measuring current, voltage, and resistance, themultimeter iswidely used in electrical engineering.III、1.Secs. 1.1 and 1.2 will discuss several other problems.2.Problems are listed/given on pp. 1-5.3.In the equations above, all hs a re the hy
23、brid parameters.4.The mass of the standard pound is equal to 0.4535924277 kilograms.5.All a s and b s in Eq. (5-1) are related to the impedance R. o6.We must take the effect of temperature on upon semiconductorsintoaccount.7.In this case, the variation of output with input is very small.8.This curve
24、 shows the dependence of distance on/upon speed. IV 、1. None of them can solve this special type of differential equation.2. They do not know whether this material can stand so large a force or not.3.There are M polygons altogether, each of which has N vertexes.4.These two engineers are busy (in) de
25、signing a new kind of software.5.Iron is almost as good a conductor as aluminum.练习 6I、1.This image, it will be noticed, is a real image.2.This technical problem, we hope, will be solved soon.103.2 is approximately 1000, a fact that we think is very useful in the study of digitalelectronics.4.A resis
26、tor of say 100 ohms should be used here. II 、1.None of those textbooks have/has mentioned this point.2.All of these x values cannot satisfy the equation.3.Neither of the two conditions is satisfied here.4.In the preceding/previous chapter, we discussed all kinds offorce.5.This paper describes a new
27、method for designing aircraft.6.By the end of the last century, the company had manufactured 5 000 radars.7. Since 2008, this research institute has been developing a specialkind of robot. III 、1.In Section 1-2, the concept of force was introduced.2.As early as the 1940s, it was found that semicondu
28、ctors are very useful.3.This result can also be arrived at in another way.4. At that time no use was made of this phenomenon/phenomenon was made no use of.5. This point will be dealt with in the next section., thisIV 、1.This computer works much better than that one (does)/This computer is much bette
29、rin performance than that one (is).2.This computer requires many more components that that one (does).3.The distance of the moon from the earth is as great as 240 000miles.4.The greater the resistance, the longer time it takes for thecapacitor to reach itsmaximum voltage/ , the longer time is requir
30、ed for the capacitor to reach its maximumvoltage.)5.The current as small as 0.1 A cannot produce enough heat. V、1. It is easy for us to determine the weight of the body.determine theweight of the body easily.或 :We can2.The two engineers are busy (in) designing a new type of computer.3.We find this concept very difficult to explain.4.None of these windows can withstand so large a force.5.Wo
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