科技英语写作高级教程(第二版)参考答案.doc

V、练习参考答案 练习1I、the(各项均为负。） 2、e; （功率额定值就是电阻器不会引起温度太大得上升而能安全地耗散得最大功率。) 3、an(这就是均方根值伏特计。） 、he； a(该设备得成功设计需要详细地了解性能指标。) 5、he; a;(在氢原子得布尔模型中,一个电子绕一个质子以半径为R得圆周运转。) 、the(电阻得单位就是欧姆。） 7、a(这就是一个参数。) 8、/; /（图51画出了Orsed得实验。) 9、； a;a（机器就是能够传递力来完成某一确定目得得一种设备。) 10、（水压机将在第4章加以考虑。) 11、the;th /(我们容易确定参数得值。） 1、/；the(根据式（-1),我们得到以下得关系式。) 13、te; /(作者工作在位于阿林顿得得克萨斯大学。) 14、a(甚至当积分区间并不就是无穷时,能够恰当地显示一个时函数得傅氏变换得仪器就是多么重要啊!)II、1. Dr、 Emmet graduatefrom Hrvad Uversit in001、2. Profesr i earne hish、D、 dege inmechancalengnering romhe Xian Uivesty ofTechnolgy 198、3. oweshl tur tthe dscusson oflcal ra etwors、4. he Banrid masctrometr is simpnannsrument te ptcal pectroeter、5. How lona time 或Hw uch tim isqueto his eperient? h denity ofaubstce s it mas per uit vlume、6. n creasenpressure aways causes aecrese i vlum、7. Fig、 (2-5) sho what s exprssed by Eq、（2-)、8. The un ofnuctanc s he enry、II、1. TheUSMA roc emplys a uiu frame stcture、2. Finly,a brad seped ipednce transforme s designe byis metod、3. ynamic alis an alaion of th euity of aproactve secesharing stem4. Theapproc can be aple o he one-dimenional otetia bariewith a abitrary pole、5. W prosa nuricametod basen wtons iterative tho、 练习2、1、 Thisircu conssts of a attery， aninductr and aapaco、2、 pute the lectric fildatpints a, b, ad 、3、 Thisselieisuse fo muicationbetweenhentedtats and Greatiin, Frcean Ity、4、 We assum tha the ntena is vetcalandhat islo is zr、5、 hapers 6, 7, and 8 da with asmision lie、I、1、Is eo is six parts in102、2、 This pte stoe fur times more inrmationhan that one (s）、3、 Teean f thisknof equipment in the na fture willb20 s what it is、4、 e oltageacoss hisponet s a fewtenth o avolt、5、 Now sinternal resr ison hrdh it wa、III、1、 This object s ver iv timeshier thtae is、2、 Unessherwise ted,i sassued thatilicotraistorar used tha ICO anbeeglected、3、 Thicicu has teadvanaes of simpl stucture aneasy adjustment、4、Fgs、 1, 2, an s h poes in detail、5、 For furh inforation,consl ferences 3,5， 、 练习3、 、 This nw peofe has manyadvantgove h genea ype、 It is nodifficl to se this dffenta euo or the nknown quanty、 3、 Ofthee iv nw chap,he firs one daswih e baic prinipls of negative feeack、4、 A this pointme, curent irs in hasefromvolta y 90o、5、nlying Byte nalis of the ramterfthe insumen， e ca ndestand its performnce、 Wwill ind u ts aergevelocity over this distnce、7、 he science o eltronc too important n the wold tdy、 、 They ovedh problem wthratdculy、I、 1、 or x1,te is no solutin t hisetin hs equatihs nosoltion、Upn Onsubstiting ubstition of the lues no in theequat, e obtaine the folloingxpessn、 hicuiti similar i oprtontohatofFig、 1-10、4、Thispter is ve good in eformn、 5、 Teewae trael only inon drectio、 1、 Ts pper reens aew methofortherecogin f rdatarets、2、 Theinfluenceof he movng state o the taeton tetrcing accuray f he EF is grea、 nothr was lnchedn t monof the 8tof October、 ltge seasurd n vlts、5、 Tey will lee or eijing o aed ninterntional conernce on molemunicatn、6、Uness ohrise stated, t is asued a silicn transsosare sed andthatICO ca bnegleed、7、 练习4I、 1、 The force acts perndiculto th sfaceof th tbl、2、 The thre oeffcients herermains to edeteried、3、The wo eqations below willbeote (freqently) usedinlater aptesi te chaperswhich flo、4、 Hre w se tabals 10 cmapar、5、Th put remas/saycontntuhange/fixd/uard/the same、 、 All he textbks availabl dscssthis problm、7、 Acuate in eratinand highin speed, pute hae founwide aplicains、 T anwe o thisprob loks correct、 9、 To paralelwesdstane (of)aprtcrryte curenti、 10、 e problem now s hwto easue the volage across tis pet、 1、 hese ata wil be sento heputng cter 2 kilmetrs aay、 1、 Uponarrangn e euation abe, we hve gt,oin the follingxpresson、 13、 Tesechage ninteractother hagsprsent、 14、 Forcs cnbe transmitd witout contc, cnay to theonbelie、 1、 Tis oeffiietis typiclly 0、35、II、1、 n tis ase， te inpu does not fal;or ntherdoes th otput、 ; heoput doe not all, et、2、 h resistance of a nctordepend not onl o trial of whichhe conuctos mad,ut ls te sze ndemeratur of the conductor、3、 Tescietis re very inretn ti toc、4、hi arameter an hardly be masured、5、Inthslaboratoy,thi instres moreexpesetananyothe oneanyone else、6、 The featues of thi deviceare small size and litwigt、 练习5I、 1、 Thseqution anbe solved netheof te folin two ways/e t wyswhi ollow、2、This basebalwll soone to rst ecause of is ineracionwth the ru、3、 ur ciceof h coefficen as 1 iorret、4、 From ts definion a the rioa ore to lnth，we c see th khas the same uit as k (dos）、 、 Ou anayis f th mcie is ofgreat sigifcace、 、 Tisfailitates teir use in icui analyss、I、1、 This polce aris upd i a receiverthsize o aatcx、 、esone hdred thdiaetr f a sik threa re usetocnec thse pnents、3、e mstwter coo these equpens/evice、 4、 te at, telehon clls were operaor conet、5、ACa e hanged/tred/cveted/tranform/tanslatdinoto DC,rocscalled/nwn s/referred o as retificaio、 A mat attacsiro materils,a alir pnomenn、 、 uesarapable of rocsingiformatin,a proes ha eviusy cul b acplshd olyinsd or heas、 8、 Aninstrument for eaurin urrent, vote, ad resistance,themultme i widly used in lctical engnern、III、1、cs、 1、 an 1、2 wildicus severalothrproblms、2、Prles ae ted/given o pp、 1-5、 In te eqaon ave, al hs rethehyi parameters、4、 he mas ofthe standapundis qal t 0、45592427kiogram、5、 Al asan b q、（5-1) are rlated t theimpeace R、6、We mst takete effect of empeature opon conductors intccount、7、 In this s, thvaritio f output wih inputis versmal、Ths curve sows thedepedene of dstance on/upon sed、 IV、 n of the ca olve th speci tpef fferil eqaton、 Ty do no kow whete tis atrial an stan o larg force oot、 There aMpolgns alethe，ech fwhich has Nvrtxes、 These twogines rusy (n)deigninga new kindf sfwae、5、Iron s alm as odaconducor a aluminu、 练习6I、1、Tis mae, it l notied，is a ral ige、2、Titnica proem, we hoe, wll b solved son、3、 1 is approxmtely 100,a fact that we think is ery usefunthe sdy of igial eleconc、4、rsitor o y 0 hsho bused e、II、1、Nneoftose textbokshav/hasnioned this point、All of thesex vaues cnnot aisfyeqation、3、 either f te woondi i tfi hr、 In he preeding/reioushapr，we dicused al kinds f frce、5、is paper describe new etho frsinin aicrft、6、By te end of thelatctr， the pany hadmanufaturd 000raars、 7、 Sic 200， tis rearch situte has been dveopiga secial in of rob、I、 1、 In Son 1-2, th coneptoforcwas irouce、 er a te 1940s, t ws found that semicnductors are very useul、3、 Ti reut ca als b rrived atianthe y、 ttha tim no use was mdof thi phenmenn, tspnn mae nouseo、5、Tispoi wl be dealtwith in the next sectio、I、 1、 Tisur wok uch beter hn that ne(dos)/his pute ismuh bettern peformance hahatne(is)、2、 his puter reus many ore poens atat oe (does)、3、 The disance ohe moonfr the eart is great as24 000 miles、4、egrae heresitce, theloner tm tkes for th capaitor torec ts maximumvoltge/, telong times requred fr te capatr toracts maximum oltg、) 5、 The urr a smal s 0、1 Acan pduce nogh heat、V、 、 It s eayfor s to detrinetheweigtof the dy、或:Wecan deterine he wiht of theboy siy、2、 e two engiers aebusy (in) desgning a n tpofputr、3、 Wefd ti coept er dificto explain、 None hese windws aithsand large force、5、 Wk qus i equa toforc ultpled by/tme ditanc、 、 e reulsbtained aree with heexpeealvalue、 aren arent ith the eenal vus、 练习7I、 、 I will ake a fe montst dign his kndf acaft wit the hlp f a pur、 2、is lef as apolem to forth eaerto shw that his expressionholds、 3、 he roam to exuteds ored in hs u、 4、 This ey acs asthfounation onhch to bld th dam、 、 In hisaboratory here are many kinds of strumntor stdns to choose fr、 6、 Le t0 equa/e eqal tzro、 7、The farthe ate trt(i）, te lnger time akes for theho to retur、 8、or thseries toconvrge， x must e less an 1、 9、W finti concept vrydificulto udestd、 10、 Ts methodmakei mh eaerto dtectargets、 11、 hs facto wil afft tabiliy oa putr to store inomti、 12、 We h to fiout a o make so for the sres to overge、 13、 Ths is pn todrpcureswit、 14、Estici isthe tendec of a ody return tosrigal condition ater being dfoed、 15、 Odinary mater is si tobeelcticaly nral、 6、Thsprperty ma it psibe fo ast e made n an shae、 7、 Thistalei unft or a stden t eperimento、 18、 Now econsidr wha pa o intrtin o tae、II、 1、 Te ine l of heviation of t cyliner diametr witight inenity as een empasizd、 、Nt nly o tmertre n ligt affct the conductivity,bu hadditio fipuritie to seconductrs also maesit cangeeaty、 3、 Vrous stlltsare requentyluhed to obtain nformtonabou/opace、 4、 Ouemicondutor iusr came ino beigat the end o the 1950s、 、 Mycoleguesand I would lik toexresurhantPresor 、 Smith for gret hep、 练习8I、 1、The ampifier aplifies the rceivedigal、 2、 oving oecles hve kinticenergy、 5、 Fig、 1 3 hos te photo of eeyfaling body、 3、ee equal istanc divided by tie、 4、 oltae uas/sequl ocrent ultplidby resance、 5、 he sistancef ir ncreaseswit te incsedinresig/an inrease i peed、 6、 A rasformeis a eviccnsistig of w or morecoils wonnroun an irn e、 、 It i necesryto find ot t curren flowig trough this ponent、 8、i bo, popery ud,wll b of great hlp o th eader、 、 Flowing throuhacircui,thecrent w loserto t eney、 10、ivennowngtime ans, e/onean fin ot ditnce、 1、 Having tued thi chapter, te tunt wl nerstandwillhaveundrstod th rinipleoaut、 2、 T peed of ligh bing exremely re, canntmesure tby ordary mthods、 3、 Seal sts ee luchd，al of te（beig) high-ltitude satlies、 14、Clled “themothr f all netwoks,”h Interets idely ued intenional netr、 15、 This fore can besolveittwo poens, one （bing） orizonaad hother vtl、II、1. Let s cnstut/dawacirlewith the origin the centr ad ofrdius R、2. Thispameter should be meurwithE rounded、 3、 Wth oresstac in the circuit， the currenil increase definiely、 4、 Wthtis in view, we have rtnthis boo、 5、 Thi aeritrduces a ne design etho/tcniqu, with emphassonits priniple、I、1. Letus onder esigning pter、2. We rferto ese onensben pasve、3. Ti nvovsaking the Fourirrnform、4. Uon rearrangithe above uatios, w obai h folowing seof qios、 5. Inuing hiequaion, tdo ntater hicplane s cnsierd asIV、 、 ven/Knowig resitnceand urrent, on/we can dterine/calcate voltge、 2、 The pie his instrmen is igh、 3、 A otisa specil ki f ltronc device、 4、 he rret tars fwigat thverymmet w cosethe cicu、 5、 Thy hve been esgning a ew typ f putr these months、 练习I、 、The oblem was not oled until apletelydfferentmehd ws rduce、 2、 early 00 years pased bfore the exstence/rseneofsubomic pariclesw onfiebyxpermentprimeall、 3、Th yer thi device ws nentd,Wold War II roke ou、 4、 Smal astey ae, atoms are e up ofstl smller pacl、 5、Tes wresirshoul selecte/choen s hathe trnsstor a opete omally、 6、The bod i insh astaeth it candwrk、 I、 1、 Te reltion that voltag is he routof rrent an resistanc ppleo all the cicuits、 2、 Te discver thaagnmc prouce current s etremelyimpont inteield of ectricity、 、 An eqti is an alebrc ttment at toalgebraiexprsins are qul、 、 There is evdece tatolife istson the moon、 5、 h qet ow aise whether h aoith ofpratical u、 6、 Ithicae hee is gua