問題詳情:如圖所示,一個電燈泡的實物電路,存在的接線故障是()sA.電源短路B.電燈斷路 C.開關短路D.電燈短路i【回答】C.知識點:電流和電路題型:選擇題...
2020-03-24 11246
FromtheSAnode,electricalimpulsesspreadthroughtheheartmuscletotriggertheheartbeat.ThisisparticularlyimportantwhentheconductingtissuesbetweentheSAnodeandtheventriclesfailonlyfromtimetotime.An"atriallytriggered"pacemakercanpickupthesignalsdirectlyfrom...
2018-10-31 24386
問題詳情:單項選擇。—DoyouoftenwatchManandNatureonTV? —Sometimes.It'saninterestingprogram,butI________SportsNews. A.prefer B.want C.know D.review【回答】A知識點:動詞和動詞短語題型:選擇題...
2020-03-20 26831
問題詳情:如圖,三稜錐S-ABC中,稜SA,SB,SC兩兩垂直,且SA=SB=SC,則二面角A-BC-S大小的正切值為()A.1B.C.D.2【回答】 C 知識點:點直線平面之間的位置題型:選擇題...
2019-02-03 15133
問題詳情:Ittook buildingsuppliestoconstructtheseenergy-savinghouses.Ittookbrains,too.A.otherthan B.morethan C.ratherthan D.lessthan【回答】B知識點:片語短語題型:選擇題...
2022-08-18 20093
問題詳情:已知三稜錐S-ABC的所有頂點都在球O的球面上,SA⊥平面ABC,SA=2,AB=1,AC=2,∠BAC=60°,則球O的體積為() A.4π B.π C.π D.12π【回答】C知識點:空間中的向量與立體幾何題型:選擇題...
2020-05-15 19892
問題詳情: ---Ihavetogettothepostofficebysixo'clock,butlook,it'salmostsix.---________.Thisclockistwentyminutesfast. A.That'stoobad B.Noproblem C.Sure,youcan D.Takeiteasy【回答】D知識點:交際用語題型:選擇題...
2022-04-11 32549
問題詳情:______peopledecidedtobuytheirowncarsearlierbecauseof“SARS” A.Anumber B.Agreatnumberof C.Agreatdealof D.Thenumberof【回答】A知識點:數詞量詞題型:選擇題...
2019-12-31 14721
問題詳情:.如圖,寫出字母所代表的正方形面積,SA=____,SB=____.【回答】625 144知識點:勾股定理題型:填空題...
2019-09-05 6593
問題詳情:Inourclass,there'sa_____thatwhenitissomebody'sbirthday,theybringinacakeforusalltoshare.A.conversation B.tradition C.discussion【回答】B知識點:單詞題型:選擇題...
2020-08-06 4604
問題詳情:已知四稜錐S—ABCD,SA⊥平面ABCD,AB⊥BC,∠BCD+∠DAB=π,SA=2,,二面角S—BC—A的大小為.若四面體SACD的四個頂點都在同一球面上,則該球的表面積為A. B.4π C.8π D.16π【回答】C 知識點:點直線平面之間的位置題型:選擇題...
2020-06-29 23050
問題詳情:(2018年杭州卷)如圖,質量分佈均勻的長方體重物A、B,密度分別為ρA和ρB,底面積分別為SA和SB,且SA>SB,將它們放在水平面上,它們對地面的壓強相等。現水平割去上半部分(如圖中虛線所示),剩餘部分對地面的壓強分別為pA和pB,對地面的壓力分別為FA和FB,下列物理量大小比較的關係正確...
2020-01-03 4406
問題詳情:A Deed a DayIt was a busy day as usual. I was making sandwiches and balancing the phone between my shoulder and chin. The washing machine sounded as my husband walked in with our daughters. Wehadonlyabouttwe...
2020-12-25 30721
TheComparisonofSA8000andOHSMS;SelecttheEnablesystemadministrator(SA)usernamecheckbox.CleartheEnablesystemadministrator(SA)usernamecheckbox.First,wehavebuiltEMFprojectsforEAMLandSA.Then,wehaveusedEMFtoimplementbi-directionaltransformationsbetweenEAMLa...
2018-07-10 24955
問題詳情:-Howmuchisthebook? -Fiftyyuan,butthere'sa_______offerifyoubuytwo. A.big B.special C.cheap D.suitable【回答】B知識點:相似相近詞比較題型:選擇題...
2020-08-12 4100
問題詳情:ArobotnamedCosmohasbecomesix-year-oldKevinFitzgerald'saidinhisuphilleverydaybattlewithdevelopmentdifficulties. Kevinshowedthefirstsignoflearningdifficultieswhenhewas18monthsold,andwaslaterdiagnosed(診斷)withdevelopmentaldisorder.But...
2021-08-12 18146
問題詳情:已知三稜錐S﹣ABC的所有頂點都在球O的球面上,SA⊥平面ABC,AB⊥BC且AB=BC=1,SA=,則球O的表面積是()A.4π B.π C.3π D.π【回答】A【考點】球的體積和表面積.【專題】計算題;空間位置關係與距離;球.【分析】由三稜錐S﹣ABC的所有頂點都在球O的球面上,SA⊥平面ABC,AB⊥...
2021-03-13 24974
問題詳情:三稜錐S﹣ABC中,SA⊥底面ABC,若SA=AB=BC=AC=3,則該三稜錐外接球的表面積為()A.18π B. C.21π D.42π【回答】C知識點:球面上的幾何題型:選擇題...
2019-08-24 20325
問題詳情:—HowfarisitfromBeijingtoHaikou?—It'sa______flightfromBeijingtoHaikou. A.3-hour-long B.3hourslong C.3hours'long【回答】A知識點:構詞法題型:選擇題...
2021-01-21 23847
問題詳情:Ican'tsaywhichwineisbest—it'sa(n)________ofpersonaltaste.A.affair B.event C.matter D.variety【回答】C知識點:名詞題型:選擇題...
2020-03-22 26673
問題詳情: “Thechildhasbecomepartofthemanagementoffamilylife,”saysAdeleSchwartz,researchdirectorforStarsforKids,achildren’smarket---researchfirm.“Thisisabigrolechangeinfamilylife.Houseworkischanging.Itusedtobetotakeoutthegarbageandwalkthedog.Thisisa...
2020-10-26 21713
問題詳情:若三稜錐S-ABC的所有頂點都在球O的球面上,SA⊥平面ABC,SA=2,AB =1,AC=2,∠BAC=60°,則球O的表面積為(A)64p (B)16p (C)12p (D)4p【回答】B知識點:空間幾何體題型:選擇題...
2020-11-04 11770
問題詳情:為研究水楊*(SA)對水稻幼苗抗寒能力的影響,研究者用0.5mmo1/L的SA噴灑水稻幼苗葉片,同時設定對照實驗,低溫處理1天后測定有關資料(下表)。請回答:總葉綠素含量mg/g胞間C02含量umo1/mo1淨光合速率umo1(C02)/(m2·s)對照組1.710408.8901.540實驗組2.120288.6702.69...
2021-07-16 18806
問題詳情:It'sa________thatI'mtoobusytotakepartintheparty.A.pleasure Blem C.pity D.task【回答】C知識點:名詞題型:選擇題...
2020-06-17 14522
問題詳情: “YOU’REtoosmall,Ginny,you’llnevermakeanOlympicteam,”saidmyfirst-everrowingcoach,waybackinthelatewinterof1978.Ihadjust41mydream.Itwassuretoobigatthatpointtosomebodywhose42notonlymattered,butwhoseemotionalsupportcouldplayakeyrole.ThenIwas...
2019-05-09 10432