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
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...
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...
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...
---Ihavetogettothepostofficebysixo'clock,butlook,it'sa...
问题详情： ---Ihavetogettothepostofficebysixo'clock,butlook,it'salmostsix.---________.Thisclockistwentyminutesfast. A.That'stoobad B.Noproblem C.Sure,youcan D.Takeiteasy【回...
用“SA node”造句大全，SA node造句
FromtheSAnode,electricalimpulsesspreadthroughtheheartmuscletotriggertheheartbeat.ThisisparticularlyimportantwhentheconductingtissuesbetweentheSAnodeandtheventriclesfailonlyfromtimetotime.An"atriallyt...
It'sa
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...
“YOU’REtoosmall,Ginny,you’llnevermakeanOlympicteam,”sa...
问题详情： “YOU’REtoosmall,Ginny,you’llnevermakeanOlympicteam,”saidmyfirst-everrowingcoach,waybackinthelatewinterof1978.Ihadjust41mydream.Itwassuretoobigatthatpointtosomebodywhose42notonlymattered,...
Ittook buildingsuppliestoconstructtheseenergy-sa...
问题详情：Ittook buildingsuppliestoconstructtheseenergy-savinghouses.Ittookbrains,too.A.otherthan B.morethan C.ratherthan D....
-Howmuchisthebook? -Fiftyyuan,butthere'sa
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...
______peopledecidedtobuytheirowncarsearlierbecauseof“SA...
问题详情：______peopledecidedtobuytheirowncarsearlierbecauseof“SARS” A.Anumber B.Agreatnumberof C.Agreatdealof D.Thenumberof...
“Thechildhasbecomepartofthemanagementoffamilylife,”sa...
问题详情： “Thechildhasbecomepartofthemanagementoffamilylife,”saysAdeleSchwartz,researchdirectorforStarsforKids,achildren’smarket---researchfirm．“Thisisabigrolechangeinfamilylife．Houseworkischangin...
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（...
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...
A Deed a DayIt was a busy day as usual. I was making sa...
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 wa...
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...
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...
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．18...
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...
（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...
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...
用“SA”造句大全，SA造句
TheComparisonofSA8000andOHSMS;SelecttheEnablesystemadministrator(SA)usernamecheckbox.CleartheEnablesystemadministrator(SA)usernamecheckbox.First,wehavebuiltEMFprojectsforEAMLandSA.Then,wehaveusedEMFto...
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...
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)/(m...
—HowfarisitfromBeijingtoHaikou?—It'sa
问题详情：—HowfarisitfromBeijingtoHaikou?—It'sa______flightfromBeijingtoHaikou. A.3-hour-long B.3hourslong C.3hours'l...
单项选择。—DoyouoftenwatchManandNatureonTV? —Sometimes.It'sa...
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...
ArobotnamedCosmohasbecomesix-year-oldKevinFitzgerald'sa...
问题详情：ArobotnamedCosmohasbecomesix-year-oldKevinFitzgerald'saidinhisuphilleverydaybattlewithdevelopmentdifficulties. Kevinshowedthefirstsignoflearningdifficultieswhenhewas18monthsold,and...
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...
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...
.如图，写出字母所代表的正方形面积，SA=
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...
Inourclass,there'sa
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...
已知四棱锥S—ABCD，SA⊥平面ABCD，AB⊥BC，∠BCD＋∠DAB＝π，SA＝2，，二面角S—BC—A...
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...
Ican'tsaywhichwineisbest—it'sa(n)
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...