首页
登录
职称英语
Trial and error are the source of our knowledge.A、isB、wereC、hasD、have beenA时
Trial and error are the source of our knowledge.A、isB、wereC、hasD、have beenA时
游客
2025-01-22
19
管理
问题
Trial and error
are
the source of our knowledge.
选项
A、is
B、were
C、has
D、have been
答案
A
解析
时态应用。短语trial and error(反复实验)是单数主语,后面谓语动词应用第三人称单数的“is”而非“are”。
转载请注明原文地址:https://tihaiku.com/zcyy/3924332.html
相关试题推荐
非洲自然资源丰富,发展潜力巨大。Africahasabundantnaturalresourcesandahugepotentialford
Thepossibilitiesfor______energysources,includingsolarpower,windpower,
Eventhoughthemainsourceof______exposureforamajorityofthehumanpopul
Eventhoughthemainsourceof______exposureforamajorityofthehumanpopulat
Thepossibilitiesfor______energysources,includingsolarpower,windpower,ge
Eventhoughthemainsourceof______exposureforamajorityofthehumanpopulat
Trialanderrorarethesourceofourknowledge.A、isB、wereC、hasD、havebeenA时
Thepossibilitiesfor______energysources,includingsolarpower,windpower,ge
Thepossibilitiesfor________energysources,includingsolarpower,windpower,
Chinaisthetopsourcecountryofinternationalstudentsintheworld.Recen
随机试题
To:AllemployeesFrom:ThomasTang,ManagerofHumanResourcesDepartmentDate:
[originaltext]W:Nowweturntooneoftheintervieweestogiveusmoreinforma
Itishardtopredicthowscienceisgoingtoturnout,andifitisreally
【1】[br]【6】[originaltext]ParalinguisticFeaturesofLangua
PeoplewhogrewupinAmericaandWesternEuropehavebecomeusedtotheide
[originaltext]M:I’vebeenworkingreallyhardinthepastsemesterandIgota
某住宅工程,建筑面积4800平方米,工程直接费为4056000元,其中人工
在案例分析法中,案例讨论的步骤包括:①展示案例资料;②确定核心问题;③小组分别讨
甲公司与乙公司签订一份秘密从境外买卖免税香烟并运至国内销售的合同。甲公司依双方约
(2020年真题)肺胀是多种肺系疾患反复发作,迁延不愈,导致肺气胀满,不得敛降的
最新回复
(
0
)