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
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
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
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,同時設置對照實驗,低温處理1天后測定有關數據(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
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
FromtheSAnode,electricalimpulsesspreadthroughtheheartmuscletotriggertheheartbeat.ThisisparticularlyimportantwhentheconductingtissuesbetweentheSAnodeandtheventriclesfailonlyfromtimetotime.An"atriallytriggered"pacemakercanpickupthesignalsdirectlyfrom...
2018-10-31
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
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
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
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
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
問題詳情：Ittook buildingsuppliestoconstructtheseenergy-savinghouses.Ittookbrains,too.A.otherthan B.morethan C.ratherthan D.lessthan【回答】Ｂ知識點：詞組短語題型：選擇題...
2022-08-18
TheComparisonofSA8000andOHSMS;SelecttheEnablesystemadministrator(SA)usernamecheckbox.CleartheEnablesystemadministrator(SA)usernamecheckbox.First,wehavebuiltEMFprojectsforEAMLandSA.Then,wehaveusedEMFtoimplementbi-directionaltransformationsbetweenEAMLa...
2018-07-10
問題詳情： “YOU’REtoosmall,Ginny,you’llnevermakeanOlympicteam,”saidmyfirst-everrowingcoach,waybackinthelatewinterof1978.Ihadjust41mydream.Itwassuretoobigatthatpointtosomebodywhose42notonlymattered,butwhoseemotionalsupportcouldplayakeyrole.ThenIwas...
2019-05-09
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
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
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
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
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
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
問題詳情：ArobotnamedCosmohasbecomesix-year-oldKevinFitzgerald'saidinhisuphilleverydaybattlewithdevelopmentdifficulties. Kevinshowedthefirstsignoflearningdifficultieswhenhewas18monthsold,andwaslaterdiagnosed（診斷）withdevelopmentaldisorder.But...
2021-08-12
問題詳情： “Thechildhasbecomepartofthemanagementoffamilylife,”saysAdeleSchwartz,researchdirectorforStarsforKids,achildren’smarket---researchfirm．“Thisisabigrolechangeinfamilylife．Houseworkischanging．Itusedtobetotakeoutthegarbageandwalkthedog．Thisisa...
2020-10-26
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
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
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
中文谷
