times

导语

小题1:D小题1:C小题1:A小题1:D小题1:A 小题1:细节题：从第二段的句子：A doctor called Alain Bombard did not believe this.可知选D小题1:细节题：从第二段的句子：He thought that people could stay alive by drinking sea water 可知答案是C小题1:细节题：从第三段的句子：he set out in a small boat to cross the Atlantic Ocean(大西洋).可知他穿过一个大洋。选A小题1:细节题：从第三段的句子：He also caught fish and they had water in them. He drank this water. He could not cook the fish, so he ate them as they were. He took small plants from the sea, which gave him more food.可知选D。小题1:细节题：从文章的内容，可知是关于喝海水的事情。选A

in the best of times在最好的时候

【答案】：C55.C【精析】本题考查的是词组的用法和上下文的理解。floweryofwords指华丽的辞藻。

是PS里的字体吧2000个价值$6000的字体下载包括字体@Arial Unicode MS @Batang @Mona @MS Mincho @PMingLiU @SimSun 04b03 04b03b 04b08 04b09 04b11 04b19 04b20 04b21 04b24 04b25 04b31 10 Lil" Ghosts 10 Minutes 10.15 Saturday Night (BRK) 10.15 Saturday Night [R] (BRK) 101 Puppies SW 12 to the Moon 14 minutes 1980 Portable 20th Centenary Faux 2Tech 3 Prong Tree 37 Kilobyte 3D LET (BRK) 4 my lover 4 Star Face Font 4YEO IN 4YEO OUT 4YEOstamp 80 Decibels 814yzx 8-bit Limit (BRK) 8-bit Limit O (BRK) 8-bit Limit R (BRK) 8-bit Limit RO (BRK) A.C.M.E. Secret Agent Aarvark Cafe Abaddon? Abadi MT Condensed Light Abbess Abduction Academy Engraved LET Acadian? Achilles AcmeFont Acquaintance Action Is, Shaded JL Action Is: The Sequel ActionIs Addled AdLib BT Adventure Adventure Subtitles Aetherfox African Aftermath (BRK) Aftershock Debris Aftershock Debris Condensed Aftershock Debris CondSolid Aftershock Debris Solid Agency FB AIBouwsmaScript AIBritishWriting Aileenation Air Millhouse Italic AirCut Airmole Airmole Antique Airmole Shaded Airmole Stripe Aladdin Alan Den Alcohole Alfredo Algerian Alien League Aliens Aliens ate my mum Allegro BT Allise Almonte Snow Almonte Woodgrain Alpha Sentry Alphabeta Amaze Amazone BT Ambient Americana BT Americana Dreams Americana Dreams Condensed Americana Dreams CondUpright Americana Dreams Expanded Americana Dreams ExpUpright Americana Dreams SC Americana Dreams SC Upright Americana Dreams Upright Americana XBd BT AmericanText BT Amethyst Ammonia Amosis Technik AmphibiPrint Ancient Geek Andale Mono IPA Andorra Andy Angelica Angie BareFoot Angie Impressing Angioma AOE Anglo-Saxon, 8th c. Anhedonia AnimalTracks Apple Garamond BT Arabolical ArbuckleFat Architext ARDS1 Argentum Argosy Arial Arial Black Arial MT Arial Narrow Arial Narrow Special G1 Arial Narrow Special G2 Arial Rounded MT Bold Arial Special G1 Arial Special G2 Arial Unicode MS Arnold Boecklin Arsis Ashley Inline Asimov AsimovSans Astron Boy Video Atomic Clock Radio AuntBertha Aurora BdCn BT Australian Sunrise Autumn Avatar Avatar Bold AvQest AwlScrawl BaaBookHmk BaaBookHmkBold Baby Blocks Babylon Industrial Badoni Bajoran Bal-Astaral Ballads Ballet Balloon Balloon XBd BT Balthazar Bangle BankGothic Lt BT Barbecue Barbed Type Bardour Bart BASEHEAD Baskerville BT Baskerville Handcut Bastion Batang BatmanForeverAlternate BatmanForeverOutline BauerBodni BT BeachType Bearpaw Bearpaw Bats Beast Wars BeautySchoolDropoutII Bedlam Remix Bell MT BellCent Add BT BellCent BdList BT BellCent NamNum BT Benegraphic Berette Bering Bermuda LP Dots Bermuda LP Open Bermuda LP Solid Bermuda LP Squiggle Bernhard Antique Bernhard BdCn BT Bernhard Modern BernhardFasD BernhardFashion BT BernhardFashionHmk BernhardMod BT Bessie BethsCuteHmk BethsCuteHmkBold BeyondControl BigApple BigBrushFont19 Bimini Biometric Joe BixAntiqueScriptHmk BixAntiqueScriptHmkBold Bizarre Bizarro Blackadder ITC BlackAdderII Blackletter686 BT Blade Runner Movie Font Blearex Blindfold Blippo Black Blippo Blk BT Bliss Blood Of Dracula BloodFeast Bloodgutter 99 Blue Highway Blue Highway Condensed Blue Highway Linocut Blue Mutant BN BenWitch Project BN Dragon BN Emulator BN-ArNoN BN-Gangsters Bodoni MT Bodoni MT Black Bodoni MT Condensed Bodoni-DTC Bold BolsterBold Bonehead BoogieWoogieHmk BoogieWoogieHmkBold Book Antiqua Bookman Old Style Bookshelf Symbol 7 Bookworm Boomerang BOOTLE Borealis Borg9 Born Boron BOUTON International Symbols Brad Bradley Hand ITC Braille Brainhead Brandish Bremen Bd BT Bremen Blk BT Bridgnorth Britannic Medium British Outline Majuscules Broadway Broadway BT Brolga Brooklyn Kid BrotherMan Brush Script Brush455 BT BrushScript BT Brussels Bubbleboy Buckethead Bud Easy Butterfly Chromosome AOE ButtonButton AOE Byte Police Caddy Caeldera Caesar Open CajunQueen Calisto MT Calligraph421 BT Calligraphic Calvin CalvinItal CameoAppearance CanadianPhotographer CanadianPhotographer-Script Candy Cane CanGoods Canker Sore CAPconstruct Captain Howdy Carmine Tango Carnation Carolingia Carr Xmas Dingbats Caslon 3 Caslon 540 Caslon Bd BT Caslon540 BT CaslonAntT CaslonNo540SwaD CaslonOpnface BT Castellar Castro Cataneo BT Cathodelic Cathzulu Catwalk Caveman Celtic Garamond the 2nd Century Century Gothic Century Schoolbook Century Schoolbook SWA Chachie Challenge Extra Bold ChanticleerRoman Chasm CHE LIVES! Cheap Fire Checkbook CheckNums-MICR Cheltenhm BT Chewed Straw Chick Chicken ChickenScratch AOE Chinese Takeaway Chinyen Chi-Town Chow Fun CHR32 ChrisHmk ChrisHmkBold Christmas Card Chubby Cheeks Cinema Circuit Scraping Clarendon Clarendon Blk BT Clarendon Lt BT Classic CluffHmk CluffHmkBold Colbert Colony Wars Comic Book Comic Sans MS Comicbook Smash CommercialScript BT Commons Composer ComputerAmok CongaLine Contour Generator Coolsville Cooper Black Cooper Blk BT Cooper BlkIt BT Copperplate Copperplate Gothic Bold Copperplate Gothic Light CopperplateTBol CopperplateTLig CopperplateTMed CopprplGoth Bd BT CopprplGoth BT Corporate Cosmic Cosmic Alien Couchlover97 Country Courier Courier New Courier SWA CoventryGarden CrackMan CRAMPS Crandall Cream and sugar Creampuff Credit River Creepygirl Cretino Croissant Crown Title Crumble Crusti CrustiEr CrustiEst CrustiWacky Cry Uncial Crystal Radio Kit Cubase Cuomotype Curlz MT Cyberia Cypher Dael Calligraphy Dael Neu Damn the Man Dance DancingDonuts Dark Crystal Outline Dark Horse Dark Side (BRK) DarkWind Data Datacut DataGlyph SP Dayton DeadGrit Deathhead KeltCaps Decaying Decrepit (BRK) Deftone Stylus DeGenerate Degrassi DellaRobbia BT Democratika DemonKnight Dendritic Voltage Deneane Deportees der D?monschriftkegel DesertDogHmk Detente Deusex Devil"s Handshake Devotion Diager Diamond Fantasy DicotMedium Diesel Digital dream Digital dream Fat Digital dream Fat Narrow Digital dream Fat Skew Digital dream Fat Skew Narrow Digital dream Narrow Digital dream Skew Digital dream Skew Narrow Digital Readout Digital Readout Condensed Digital Readout CondUpright Digital Readout Expanded Digital Readout ExpUpright Digital Readout Thick Digital Readout Thick Upright Digital Readout Upright Dignity Of Labour Dingbats Ding-DongDaddyO Dinobots DirtyDeco Disney Comic Disney Heroic Distortia Division X Docu Dolphin Dom Casual DomCasual BT DomCasualD Dominican DomoAregato Dornen Dot Your Eyes Dr Carbfred Dr Sugiyama Draggletail Dragonmaster DreadLox DreamScar Due Date Dukeplus Dutch 801 SWA Dutch-Oven Dutch-Treat Dynamic DynamicItal Dynasty Black Cond. Dynasty Black Ext. Dyspepsia Eager Naturalist EastMarket EatpooChubby EatpooSkinny EatpooTall EddieFisher Edgewater Edwardian Script ITC Electroharmonix Elephant Emmett Empire BT EmpireState EndlessShowroom Engravers MT Enliven Entrez Eras Bold ITC Eras Demi ITC Eras Light ITC Eras Medium ITC EraserDust Erasure Estrangelo Edessa Eurasia Eurostile Eurostile Extended Everett Steele"s Hand Excelerate Excelerate Left Excelerate Outline Excelerate Straight Exotc350 Bd BT Exotc350 Lt BT Exploding Sheep Extra Bold Extra virgin Eye Rhyme Fadgod Fake Plastic FakeReceipt False-Negative False-Positive FancyPants FashionVictim Fast Girls-A Cup Fast Girls-B Cup Fast Girls-C Cup Fast Girls-Wired For Speed Fast Girls-Wired For Support Fatboy Slim BLTC (BRK) Federation FederationBold FederationClassic FederationClassicMovie FederationCrille FederationDS9Title FederationHull FederationStarfleet FederationStarfleetSquare FederationTNGTitle FederationWide Felix Titling Fette Engschrift Fette Fraktur FFF Atlantis Trial FFF Freedom Trial FFF Galaxy FFF Galaxy Bold FFF Galaxy Bold Extended FFF Galaxy Extended FFF Galaxy Extra Bold FFF Galaxy Extra Bold Extended FFF Harmony FFF Reaction Trial FFF Sailor Final Frontier Firecat Firestarter First-Grader fixed_bold fixed_v03 fixed_v05 Flare Gothic Flare Light Gothic Flat Brush Flat Earth Scribe Fleck Flounder Fluoride Beings FormalScrp421 BT Forte Fortuna Dot Forty-SecondStreet FrancineHmk FrancineHmkBold Frankfurter Venetian TT FrankGoth BT FrankGoth Cn BT FrankGoth XCn BT Franklin Cond. Gothic Franklin Extra Cond. Gothic Franklin Gothic Franklin Gothic Book Franklin Gothic Demi Franklin Gothic Demi Cond Franklin Gothic Heavy Franklin Gothic Medium Franklin Gothic Medium Cond Freaks of Nature [massive] Freefrm710 BT Freefrm721 BT Freehand575 BT Freehand591 BT Freestyle Script French Script MT French Vogue Frugal Sans Fruitopia XXXX FullTiltBoogie FultoonHmk Futura BdCn BT Futura Bk BT Futura Hv BT Futura Lt BT Futura LtCn BT Futura Md BT Futura MdCn BT Futura XBlk BT Futura XBlkCn BT Futura XBlkCnIt BT Futura XBlkIt BT FuturaBlack BT Future Futurist Galant Gallery Gamekeys MT Gamma Sentry Gando BT Garamond GaramondBold GaramondBoldItalic GaramondItalic Gargoyles Garrison Cond. Sans Garrison ExtraBold Sans Garrison ExtraCond. Sans Garrison Kayo Garrison Light Sans Garrison Sans Gautami Gaze GeeohHmk GeeohHmkBold genown_v01 Geometr231 BT Geometr231 Hv BT Geometr415 Blk BT Geometr415 Lt BT Geometr415 Md BT Georgia GeoSlab703 Md BT Geotype TT Get Burnt Ghettout GhoulyBooly Gigi Gilde Gill Sans MT Gill Sans MT Condensed Gill Sans MT Ext Condensed Bold Gill Sans Ultra Bold Gill Sans Ultra Bold Condensed GilliesGotDLig Gilligans Island Girls are Weird GLADYS Glamourgirl GlazKrak Glockenspiel Gloucester MT Extra Condensed Gornathon Gotham Nights Gothic821 Cn BT Goudy Handtooled Goudy Old Style Goudy Stout GoudyOlSt BT Greek Diner Inline TT Greyhound Gritzpop GritzpopGrunge GroupSex Grudblitter Guitar Pro 5 Gurnsey20 GweetHmk GweetHmkBold Haettenschweiler HairBrush Hallmarke Black Hallmarke Condensed Hallmarke Condensed Black Hallmarke Condensed Light Hallmarke Light HamburgerHeaven HandelGothic BT HandskriptOne Hansen Happy Hardcore Harvest HarvestItal HavixHmk HavixHmkBold Haxton Logos TT Helvetica Helvetica Condensed Helvetica CondensedBlack Helvetica CondensedLight Heritage Herr Von Muellerhoff He"s Dead Jim Highlight LET Hilde HILOGINBOLD HILOGINCON HILOGINREG Hiragana HISKYFLIPPERHI HISKYFLIPPERHIBOLD HISKYFLIPPERLOW HISKYFLIPPERLOWBOLD hl2ctf H-Man Hobbiton Brushhand Hobo Hobo BT Hog Bold - HMK Hog Book - HMK HolidayPi BT Hollywood Hills Hollywood Hills Condensed Hollywood Hills Expanded Hombre hooge 05_55 HooskerDont HooskerDoo HoratioDMed Horseshoes And Lemonade Hot Pizza HotDog Humnst777 BT Humnst777 Lt BT Huxley Titling HuxleyVertical BT Hyena IglooCaps Impact Imprint MT Shadow Incised901 BT Incised901 Nd BT Informal011 Blk BT Informal011 BT Ingenius Interim InternationalDisgrace InternationalDisgrace-Maximus InternationalDisgrace-ValRe Inthacity Italianate ItalianGarmnd BT Jamiro JanieHmk JanieHmkBold Japanese Jawbox JawboxChanky Jawbreaker Jazz JellyBelly JernaBold Jessescript Jillian Gothic John Handy LET Jokerman Alts LET Jokerman LET Jungle Jungle Juice JungleFever Junior & Stinky Kaggish Kartika Kauflinn Kaufmann Bd BT KellyAnnGothic Kelt Kharon4a Bold kharon4a_mini KingTut KingTut-Too Kinkie Kis BT Kismet-Normal Kiss The Sky KlingBold Klingon KlingonBlade KlingonDagger KlingonScript KlingonStilleto KlingonTNG KoloAlternates KoloNarrow KoloRegular KoloWide Kraftwerk Kristin Kroebern kroeger 0853 kroeger0853cyr Kudasai La Bamba LET LamboHmk LamboHmkBold Lambrettista Lapidary333 Blk BT Latha Latin Wide Latin XCn BT Laundrette Lavaman Legal Tender LettrGoth12 BT Liberate Liberty Libra BT Light Limousine Lissen LooneyTunes BT LooneyTunes Tilt BT Louisville Love LTibetan Lucian BT Lucida Console Lucida Handwriting Lucida Sans Lucida Sans Typewriter Lucida Sans Unicode LucidaGrande Luncheonette Lydian BT Lynda Cursive Maiandra GD Mangal Manorly Mantisboy Margaret MaritaTextBookHMK MaritaTextMediumHMK Marker-Fat Marker-Icons Marker-Skinny Marlett Marriage Martina Matisse ITC Matrix McBooHmk Medium Meet John Henry Mega Mekanik LET MelodBold MelodItal Mcft Logo 95 Mcft Sans Serif Milano LET Minerva Mingle MiniSet MinstrelPosterWHG Mirror Miss Lankfort MisterEarl BT MisterFrisky Mistral Modern20 BT Mojo Mona MondoRedondo MonkeyCaughtStealing MonkeyCaughtStealing-Elong MonkeyCaughtStealing-Squat MonkeyCaughtStealing-SquatObliq Monkey-Fingers Monospac821 BT Monotype Corsiva Moonbeam Moonshine MoonshineMurky Morpheus Mr Sheffield Mr Sopkin Mrs Blackfort Mrs Saint-Delafield MS Mincho MS Outlook MS Reference Sans Serif MS Reference Specialty Mural Script Murga Muriel MV Boli Mycalc Myriad Condensed Web Myriad Pro Myriad Pro Black Myriad Pro Black Cond Myriad Pro Black SemiExt Myriad Pro Cond Myriad Pro Light Myriad Pro Light Cond Myriad Pro Light SemiExt Myriad Pro SemiExt Myriad Web NChords NeedALilly Newage News Gothic MT News Serif Niamey Nickodemus-Extremus NimbusRomD NimbusRomdBold NimbusRomdItalic NimbusSanTCon NimbusSanTConBold Noel NoelBlack Nora Casual Notes NotnorvalHmk NotnorvalHmkBold Notram November Nowdance OccidentalDismount OccidentalDismount-Halftone OccidentalDismount-Mapped OCR A Extended OCR-A BT OCR-B-10 BT Odessa LET OkrienHmk OkrienHmkBold Old Towne No.536 OldDreadfulNo7 BT Olivette One Stroke Script LET Onyx BT OpineHeavy Optimum orange Fizz orange LET orbital orbit-B BT orbusMultiserif org_v01 ornaMental OttumHmk OttumHmkBold OzHandicraft BT Palace Script MT Palatino Palatino Linotype Palent PalentItal Palton Papyrus Paris Parisian BT Park Avenue ParkAveD ParkAvenue BT Parkway-Hotel Parkway-Motel Parkway-Resortotel PegsannaHMK Penmanship: B- Penultimate PenultimateLight PenultimateLightItal Pepita MT Perpetua Perpetua Titling MT Pesto Petra Photo PhrasticMedium Pirate pixelpunch Pixies Plattmask Playbill BT PlayingCards PMingLiU Politica Politica XT Politica XT Light Politica XT Thin Pooh Pop PosterBodoni BT PosterBodoni It BT Pragmatica Present Pricedown Pristina Pump Demi Bold LET Pure-Capital Pure-CircuitCap Pure-LightCap Pure-UltraCap QUAKE QuigleyWiggly QuiverItal Quixley LET Raavi Rage Italic Rage Italic LET RansomNote Rap Raydiant Regular Remember RhubarbPie Rialto Ribjoint Rock Rockwell Rockwell Condensed Rockwell Extra Bold ROCKY AOE Roland Romulan RomulanEagle RomulanFake RomulanFalcon RomulanHawk Rondalo Rough

单词错了不是dirk是dick, 妙在hard这个形容词，有"艰难"也有"硬"的意思

你好！这句话翻译出来的意思是“但他们很快就发觉，化装的效果有时过分完美了。”看不懂的原因可能是句首的but和as连在一起，比较迷惑。不妨先去掉but，把as换成which来理解，很明显大家能分辨这是一个由which引导的非限制性定语从句，那么换回as，本句话其实是由as引导的非限制性定语从句。至于此处为什么不用which而用as，就涉及两个词语引导非限制性定语从句的不同了。希望采纳

put...to use 是一个词组，使用的意思，单独说put没有意义

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歌曲名:Good Times Gonna Come歌手:Aqualung专辑:AqualungGood Times Gonna ComeAqualungNeed to knowIf you"re letting goIt"s alright,alright, it"s alrightDidn"t knowI was hurting you soIt"s alright, alright, it"s alright.You came to me from nowhereWith nothingAnd no-oneHold tight, hold tight, hold tightGoes to showYou never really knowIt"s alright, it"s alright, it"s alrightThis is just one of thoseLonely nightThe good times gonna comeThe good times gonna comeSee me thenInvesting so muchIn you, in you, in youCame so closeTo the edgeI do, I do, I doThis is just one of thoseLonely nightThe good times gonna comeThe good times gonna comeIn the endWe let it go awayWe let it float awayOn the breeze"Round the bendThe sun is in the skyIt"s starting to look likeIt"s gonna be, yeah, it"s gonna beA brightBeautiful dayYeah, the good times gonna come, oh noThe good times gonna come, yeah, yeah,This is just one of thoseLonely nightThe good times gonna come, oh,The good times gonna come, oh yeahThe good times gonna come, ohhThe good times gonna come, yeah.Need to know if you"re letting goIt"s alright, it"s alright, it"s alrighthttp://music.baidu.com/song/751727

Sometimes I really doubt whether there is love between my parents. Every day they are very busy trying to earn money in order to pay the high tuition for my brother and me. They don"t act in the romantic ways that I read in books or I see on TV. In their opinion, "I love you" is too luxurious for them to say. Sending flowers to each other on Valentine"s Day is even more out of the question. Finally my father has a bad temper. When he"s very tired from the hard work, it is easy for him to lose his temper. One day, my mother was sewing a quilt. I silently sat down beside her and looked at her. "Mom, I have a question to ask you," I said after a while. "What?" she replied, still doing her work. "Is there love between you and Dad?" I asked her in a very low voice. My mother stopped her work and raised her head with surprise in her eyes. She didn"t answer immediately. Then she bowed her head and continued to sew the quilt. I was very worried because I thought I had hurt her. I was in a great embarrassment and I didn"t know what I should do. But at last I heard my mother say the following words: "Susan," she said thoughtfully, "Look at this thread. Sometimes it appears, but most of it disappears in the quilt. The thread really makes the quilt strong and durable. If life is a quilt, then love should be a thread. It can hardly be seen anywhere or anytime, but it"s really there. Love is inside." I listened carefully but I couldn"t understand her until the next spring. At that time, my father suddenly got sick seriously. My mother had to stay with him in the hospital for a month. When they returned from the hospital, they both looked very pale. It seemed both of them had had a serious illness. After they were back, every day in the morning and dusk, my mother helped my father walk slowly on the country road. My father had never been so gentle. It seemed they were the most harmonious couple. Along the country road, there were many beautiful flowers, green grass and trees. The sun gently glistened through the leaves. All of these made up the most beautiful picture in the world. The doctor had said my father would recover in two months. But after two months he still couldn"t walk by himself. All of us were worried about him. "Dad, how are you feeling now?" I asked him one day. "Susan, don"t worry about me." he said gently. "To tell you the truth, I just like walking with your mom. I like this kind of life." Reading his eyes, I know he loves my mother deeply. Once I thought love meant flowers, gifts and sweet kisses. But from this experience, I understand that love is just a thread in the quilt of our life. Love is inside, making life strong and warm..

couples of times 次数稍多

几十次，dozen表示“一打，十二”

可能是故障导致的。拓展1.在Arcgis中打开新的文件，最好是将其放在文件夹里，将dwg文件放置于文件夹中，方便打开。2.点击打开Arcgis软件3.在软件中，点击添加数据按钮加载dwg文件（不能直接拖动）4.打开之前新建的文件夹，选中dwg文件5.dwg文件是CAD文件的格式，一般由点、线、面等构成6.若是想使dwg文件与其他图层叠加，需要将其中的三个取消勾选，留下一个即可，剩下的图就会变成透明。

many times ： 多次，许多次C： 经常 B： 总是从含义来看B 不对

CFLs耗电量相比旧灯泡少了百分之67,他们比旧灯泡持续的时间长了十倍之多~

LAST

timespan 是个已经定义了的数据类型，不用写的TimeSpan a = b-c; //b c 都是DateTime 类型Add：与另一个TimeSpan值相加。 Days:返回用天数计算的TimeSpan值。 Duration:获取TimeSpan的绝对值。 Hours:返回用小时计算的TimeSpan值 Milliseconds:返回用毫秒计算的TimeSpan值。 Minutes:返回用分钟计算的TimeSpan值。 Negate:返回当前实例的相反数。 Seconds:返回用秒计算的TimeSpan值。 Subtract:从中减去另一个TimeSpan值。 Ticks:返回TimeSpan值的tick数。 TotalDays:返回TimeSpan值表示的天数。 TotalHours:返回TimeSpan值表示的小时数。 TotalMilliseconds:返回TimeSpan值表示的毫秒数。 TotalMinutes:返回TimeSpan值表示的分钟数。 TotalSeconds:返回TimeSpan值表示的秒数。

signofthetimes是反战歌曲

(1)关于如何选取时间步长Timescale，可以参考下面的介绍（摘自CAEBEGINNER）。(2)ResidualTarget默认为1E-4，如果要求高的话还可以提高精度。CFX的求解器是比较特别的，和普通教科书上的不太一样。它使用耦合求解器(coupledsolver)，并且使用求解瞬态方程的方法来求解稳态问题。时间步长(timescale)是影响收敛的最重要的因素。时间步长在耦合求解器里的重要性，相当于松弛因子(underrelaxationfactor)在分离求解器(segregatedsolver)里的重要性。打个比方，在开车时。如果速度很慢，就会比较安全，但是需要比较长的时间才能到达目的地；如果速度很慢，就会节省时间，但是可能会不安全。同样的，在用CFX求解时，如果timescale很小，收敛会很稳定，但是需要很多的迭代，速度较慢；如果timescale很大，需要的迭代次数较少，但也可能引起求解器不稳定，甚至发散。因此合适的timescale对于收敛是很重要的。通常情况下，timescale可以根据(特征时间=特征长度/特征速度)这个公式算出来。但是对于复杂的流场而言，直接推算出合适的时间步长还是有一定难度的，需要试出合适的timescale。在CFX里，autotimescale是让系统自动估算出timescale，而physicaltimescale是由用户直接输入timescale。通常情况下，系统估算出的autotimescale过于保守，用户需要使用较大的physicaltimescale。另外，由于使用耦合求解器的缘故，CFX一般能在100-200个迭代步内收敛。如果在200步内还没有收敛的话，需要考虑改大timescale，而不是让系统跑更多的迭代(例如，把最大迭代数设成1000)，这样会浪费很多宝贵的时间。最近碰到一个室内空调系统的模拟问题，由于浮力(buoyancy)的存在，动量方程和能量方程的耦合会导致收敛困难。使用的是CFX11.0。11.0提供了时间步长系数(Timescalefactor)这个新选项，可以方便的测试不同的timescale。timescalefactor=10代表timescale=10*autotimescale。上面所说的空调模拟问题，我测试了timescalefactor=1、10、100三种情况。平均残差(RMSresidual)和全局不平衡(globalimbalance)的曲线图附在下面。从曲线图可以清楚地看出，使用小的时间步，收敛曲线呈波浪形，或收敛缓慢，全局不平衡较大；使用大的时间步，收敛曲线呈”之”字形上下跳动。下面这个例子，timescalefactor=10可能较快得到收敛结果，最终我使用了timescalefactor=20。曾经尝试修改能量方程的时间步长，但是效果不太好。CFX物理时间尺度的选择取（转载