確定濕空氣的熱力狀態需要的獨立參數個數為（）。
A、1個C
根據相律公式r=k-f+2，式中，r為需要的獨立參數;k為組元數;f為相數。濕空氣是指由空氣與水蒸氣組合而成的二元單相混合工質，則k=2，f=1 ，r=3。因此，要確定濕空氣的熱力狀態需要的獨立參數為3個。
PartVWriting
寫作指導
這是一篇描寫文(Description)。用通俗的話說，描寫文就是用文字給人物、地點、景物畫象。一篇描寫文主要是通過所感受的細節——所見所聞發展而來的。在寫人時，不僅僅要用細節描寫其外貌，而要注重通過他的言行來表現其人物性格、思想和品德，更要抓住他區別于他人的性格特點，這樣就容易給讀者留下深刻的印象。短文的第一、二段敘述故事發生的時間、地點，故事發生的原因及故事所涉及的人物。文章的三、四、五段描寫的是人物的外貌，穿著及性格特點。通過對人物言行的簡單描寫來揭示主人翁的助人為樂的高尚精神。短文的最后一段，要用一句話概括作者對主人翁的看法：Agoodguy。文章有描述，有議論，要加敘加議，有血有肉，上下文連貫要緊密，首尾要呼應，人和事要給人們留下深刻印象。
Questions1to5arebasedonthefollowingpassage:
Someyearsagothecaptainofashipwasveryinterestedinmedicine.Healwaystookmedicinebookstoseaandlikedtotalkaboutdifferentdiseases.
Onedayalazysailoronhisshippretendedtobeill.Helayonhisbunk(鋪)andgroanedasifhewereverysick.Thecaptaincametoseehimandwasverypleasedtohaveapatienttolookafter.Hetoldthemantorestforafewdaysandmadetheothersailorsdohiswork.Threedayslateranothersailorpretendedthathehadsomethingwrongwithhischest.Oncemorethecaptainlookedinhismedicalbooksandtold“sick”mantohavearest.
Theothersailorswereveryangrybecausetheyhadmoreworktodo.Thepatientshadthebestfoodandlaughedattheirfriendswhenthecaptainwasnotlooking.Atlastthemate(船長副手)decidedtocurethe“sick”men.Hemixedupsomesoap,soot(煙灰),glue(膠水)andotherunpleasantthings.Thenheobtainedpermissionfromthecaptaintogivehismedicinetothe“sick”men.Whentheytastedthemedicine,theyreallydidfeelill.Itwassohorriblethatoneofthepatientsjumpedoutofhibunk,ranupondeskandclimbedthehighestmastontheship.Hedidnotwantanymoremedicine.
Thematetoldbothofthementhattheymusttakethemedicineeveryhalfanhour,nightandday.Thissooncuredthem.Theybothsaidtheyfeltbetterandwantedtostartwordagain.Thecaptainrealizedthatthementriedtodeceivehimsohemadethemworkveryhardfortherestofthevoyage.
1.Thefirstsailorpretendedtobeillbecausehewantedto.
A.testthecaptain’sknowledgeofmedicine
B.befreefromwork
C.havethebestfoodontheship
D.playajokeonhisfriends
2.Whenthecaptainknewasailorwasill,he.
A.didn’tcaremuch
B.sentforadoctor
C.lookedafterhimandtoldhimtohavearest
D.gavehimsomemedicine
3.Thepatientsfeltbetterquicklybecause.
A.theyhadbeengivenpropermedicine
B.theylearnedthatthecaptainhadfoundoutthetruth
C.theywerelaughedatbytheirfriends
D.themedicinethemategavewashorrible
4.Whenthecaptainknewhehadbeendeceived,he.
A.toldthemnottodosoagain
B.losthistemper
C.madethemworkharder
D.firedthem
5.Whichofthefollowingbestsummarizesthepassage?
A.AsuddenCure.
B.TwoPatients.
C.CaptainandSailors.
D.ADifficultVoyage.
PartIVTranslation
Bymakingvehicleslighterinweightaluminumhasgreatlyreducedtheamountoffuelneededtomovethem,(PassageTwo)
Everyone____therighttohisownopinion.
PartIVTranslation：
Oneofthemwasfrommyschooldays,whenourninthgradeteacher,MissRaber,wouldpickoutwordsfromtheReader’sDigesttotestourvocabulary.(PassageFour)
