- 問題詳情:在研究微觀粒子時常用電子伏特(eV)做能量的單位.1eV等於一個電子經過1V電壓加速後所增加的動能.若電場中的a、b兩點間的電勢差為1V,將一電子從a點移到b點,電子克服電場力做功為1eV,則()A.場強方向一定由b指向aB.場強方向一定由a指向bC.電子的電勢能增加1eVD.電子的電勢能減少1...
- 29198
- 問題詳情: FormostthinkerssincetheGreekphilosophers,itwasself-evidentthatthereissomethingcalledhumannature,somethingthatconstitutestheessenceofman.Therewerevariousviewsaboutwhatconstitutesit,buttherewasagreementthatsuchanessenceexists---thatistosay,...
- 7928
- 問題詳情:詞彙運用。根據句意及漢語提示填寫單詞。1.Whatdoyouthinkof________(卡通片)?2.Everythingis________(準備好的).Let'sstart.3.Whatisthe________(主要的)differencebetweenthetwopictures?4.Thequestionisvery________(簡單的),soallthestudentscananswerit.5.Iwantt...
- 24495
- 問題詳情: 埃博拉出血熱是由埃博拉病毒(EV)引起的一種急*傳染病,病死率極高。請回答: (1)EV侵入機體後,首先攻擊吞噬細胞,使吞噬細胞受損,進而抑制 免疫,導致機體防衞功能下降,病毒在體內迅速增殖。 (2)若要確診EV感染者,可以根據____的特*,用基因工程生產的抗體對組織內EV...
- 11102
- 問題詳情:關於電子伏(eV),下列説法中,正確的是( )A.電子伏是電勢的單位 B.電子伏是電場強度的單位C.電子伏是能量的單位 D.1eV=1.60×1019J【回答】C 知識點:電勢能和電勢題型:選擇題...
- 18571
- 問題詳情:EV71與腸道病毒 腸道病毒在病毒微生物學上的分類是屬於微小病毒科中的腸道病毒羣。腸道病毒71型,簡稱EV71。腸道病毒一般是以數字命名的,排列順序代表着其發現的先後次序。按順序,這種病毒被命名為腸道病毒71型。EV71為目前腸道病毒羣中最晚發現的病毒,其感染...
- 12318
- Analysisoncdma20001XEV-DOCoverageAnalysisofNetworkInteroperabilityBetweencdma20001xandEV-DOResearchoncdma20001xandEV-DOHybridTerminalInteroperabilityProblingtheBottlenecksofDownloadSpeedandOptimizationMethodsofthecdma2000EV-DONetwork該項禁令對高速EV-...
- 32170
- 問題詳情:閲讀填空先通讀下面的短文,然後根據短文內容,在文章後的表格內填入一個最恰當的單詞。每個空格只能填一個單詞。EveryweekendinBritain,DIYshopsandgardencentresarealwaysfullofpeople.Alargenumberofpeoplespendtheirweekendsdoingimprovements(改進)totheirhome...
- 23807
- 問題詳情:ItwasnotuntilIcametoBeijingthatIhadatasteofthesaying“Eventhoughtheeyesofastrangerarebig,theycannotseeeverything.”AvisittotheGreatWallshowedmeoneofmankind’s 61 (astonish)achievements.BuiltbyEmperorQinShihuangasadefenceagainstthe 62...
- 24200
- 問題詳情: Interestisasvitaltolearningastheabilitytounderstand,even________so. A.more B.thatC.much D.most【回答】A知識點:形容詞題型:選擇題...
- 28620
- 問題詳情:CANYOUIMAGINEHOWHARDITWOULDBETOREADSENTENCESLIKETHIS?Everyoneofusgetssousedtopunctuationmarksthatnotmanyofusgivethemasecondthought.Actually,theancientGreekswrotethisway.Thelackofpunctuationmarksprobablydidn’tbothergoodreaders,though.Astheyre...
- 28504
- 問題詳情:Anewstudysayselectronictoysarenothelpingbabieslearn."Evenifcompaniesaremarketingthemaseducational,they'renotteachingthebabiesanythingatthistime,"saidAnnaSosathestudy'sauthor.Researcherslistenedtoaudio(聲音的)recordingsofparentsplayingwith...
- 4528
- 問題詳情:説一説,寫一寫。下面是你們學校第一學期課外活動表,請你用英文告訴你的同學們並寫出來Goodmorning,everyone.I'lltellyouwhatwe'lldoduringthisterm.1.We'll________________________________.2.We'll________________________________.3.We'll_________________...
- 4968