问题详情：如图所示，一个电灯泡的实物电路，存在的接线故障是（）sA．电源短路B．电灯断路 C．开关短路D．电灯短路i【回答】C．知识点：电流和电路题型：选择题...
2020-03-24
问题详情：三棱锥S﹣ABC中，SA⊥底面ABC，若SA＝AB＝BC＝AC＝3，则该三棱锥外接球的表面积为（）A．18π B． C．21π D．42π【回答】C知识点：球面上的几何题型：选择题...
2019-08-24
问题详情：.如图，写出字母所代表的正方形面积，SA=____，SB=____.【回答】625 144知识点：勾股定理题型：填空题...
2019-09-05
问题详情：若三棱锥S-ABC的所有顶点都在球O的球面上，SA⊥平面ABC，SA＝2，AB ＝1，AC＝2，∠BAC＝60°，则球O的表面积为（A）64p （B）16p （C）12p （D）4p【回答】B知识点：空间几何体题型：选择题...
2020-11-04
问题详情：为研究水杨*(SA)对水稻幼苗抗寒能力的影响,研究者用0.5mmo1/L的SA喷洒水稻幼苗叶片,同时设置对照实验,低温处理1天后测定有关数据(下表)。请回答:总叶绿素含量mg/g胞间C02含量umo1/mo1净光合速率umo1(C02)/(m2·s)对照组1.710408.8901.540实验组2.120288.6702.69...
2021-07-16
问题详情：______peopledecidedtobuytheirowncarsearlierbecauseof“SARS” A.Anumber B.Agreatnumberof C.Agreatdealof D.Thenumberof【回答】A知识点：数词量词题型：选择题...
2019-12-31
TheComparisonofSA8000andOHSMS;SelecttheEnablesystemadministrator(SA)usernamecheckbox.CleartheEnablesystemadministrator(SA)usernamecheckbox.First,wehavebuiltEMFprojectsforEAMLandSA.Then,wehaveusedEMFtoimplementbi-directionaltransformationsbetweenEAMLa...
2018-07-10
问题详情：Ittook buildingsuppliestoconstructtheseenergy-savinghouses.Ittookbrains,too.A.otherthan B.morethan C.ratherthan D.lessthan【回答】Ｂ知识点：词组短语题型：选择题...
2022-08-18
问题详情：（2018年杭州卷）如图，质量分布均匀的长方体重物A、B，密度分别为ρA和ρB，底面积分别为SA和SB，且SA＞SB，将它们放在水平面上，它们对地面的压强相等。现水平割去上半部分（如图中虚线所示），剩余部分对地面的压强分别为pA和pB，对地面的压力分别为FA和FB，下列物理量大小比较的关系正确...
2020-01-03
问题详情：-Howmuchisthebook? -Fiftyyuan,butthere'sa_______offerifyoubuytwo. A.big B.special C.cheap D.suitable【回答】B知识点：相似相近词比较题型：选择题...
2020-08-12
问题详情：It'sa________thatI'mtoobusytotakepartintheparty.A.pleasure Blem C.pity D.task【回答】C知识点：名词题型：选择题...
2020-06-17
问题详情：Ican'tsaywhichwineisbest—it'sa(n)________ofpersonaltaste.A．affair B．event C．matter D．variety【回答】C知识点：名词题型：选择题...
2020-03-22
问题详情：已知四棱锥S—ABCD，SA⊥平面ABCD，AB⊥BC，∠BCD＋∠DAB＝π，SA＝2，，二面角S—BC—A的大小为．若四面体SACD的四个顶点都在同一球面上，则该球的表面积为A． B．4π C．8π D．16π【回答】C 知识点：点直线平面之间的位置题型：选择题...
2020-06-29
问题详情：如图，三棱锥S-ABC中，棱SA，SB，SC两两垂直，且SA=SB=SC，则二面角A-BC-S大小的正切值为（）A.1B.C.D.2【回答】 C 知识点：点直线平面之间的位置题型：选择题...
2019-02-03
问题详情： “Thechildhasbecomepartofthemanagementoffamilylife,”saysAdeleSchwartz,researchdirectorforStarsforKids,achildren’smarket---researchfirm．“Thisisabigrolechangeinfamilylife．Houseworkischanging．Itusedtobetotakeoutthegarbageandwalkthedog．Thisisa...
2020-10-26
问题详情：—HowfarisitfromBeijingtoHaikou?—It'sa______flightfromBeijingtoHaikou. A.3-hour-long B.3hourslong C.3hours'long【回答】A知识点：构词法题型：选择题...
2021-01-21
问题详情：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
问题详情：Inourclass,there'sa_____thatwhenitissomebody'sbirthday,theybringinacakeforusalltoshare.A.conversation B.tradition C.discussion【回答】B知识点：单词题型：选择题...
2020-08-06
问题详情： ---Ihavetogettothepostofficebysixo'clock,butlook,it'salmostsix.---________.Thisclockistwentyminutesfast. A.That'stoobad B.Noproblem C.Sure,youcan D.Takeiteasy【回答】D知识点：交际用语题型：选择题...
2022-04-11
问题详情： “YOU’REtoosmall,Ginny,you’llnevermakeanOlympicteam,”saidmyfirst-everrowingcoach,waybackinthelatewinterof1978.Ihadjust41mydream.Itwassuretoobigatthatpointtosomebodywhose42notonlymattered,butwhoseemotionalsupportcouldplayakeyrole.ThenIwas...
2019-05-09
问题详情：已知三棱锥S－ABC的所有顶点都在球O的球面上，SA⊥平面ABC，SA＝2，AB＝1，AC＝2，∠BAC＝60°，则球O的体积为() A．4π B.π C.π D．12π【回答】C知识点：空间中的向量与立体几何题型：选择题...
2020-05-15
FromtheSAnode,electricalimpulsesspreadthroughtheheartmuscletotriggertheheartbeat.ThisisparticularlyimportantwhentheconductingtissuesbetweentheSAnodeandtheventriclesfailonlyfromtimetotime.An"atriallytriggered"pacemakercanpickupthesignalsdirectlyfrom...
2018-10-31
问题详情：ArobotnamedCosmohasbecomesix-year-oldKevinFitzgerald'saidinhisuphilleverydaybattlewithdevelopmentdifficulties. Kevinshowedthefirstsignoflearningdifficultieswhenhewas18monthsold,andwaslaterdiagnosed（诊断）withdevelopmentaldisorder.But...
2021-08-12
问题详情：已知三棱锥S﹣ABC的所有顶点都在球O的球面上，SA⊥平面ABC，AB⊥BC且AB=BC=1，SA=，则球O的表面积是（）A．4π B．π C．3π D．π【回答】A【考点】球的体积和表面积．【专题】计算题；空间位置关系与距离；球．【分析】由三棱锥S﹣ABC的所有顶点都在球O的球面上，SA⊥平面ABC，AB⊥...
2021-03-13
问题详情：单项选择。—DoyouoftenwatchManandNatureonTV? —Sometimes.It'saninterestingprogram，butI________SportsNews. A.prefer B.want C.know D.review【回答】A知识点：动词和动词短语题型：选择题...
2020-03-20
中文谷
