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
2023-12-27
10
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://www.tihaiku.com/zcyy/3309772.html
相关试题推荐
Wheredoesmostoceanplasticcomefrom?A、Industrialwastesources.B、Household
Wearecurrentlygrowingataratethatisusinguptheearth’sresourcesfarfa
非洲自然资源丰富,发展潜力巨大。Africahasabundantnaturalresourcesandahugepotentialford
Trialanderrorarethesourceofourknowledge.A、isB、wereC、hasD、havebeenA时
Eventhoughthemainsourceof______exposureforamajorityofthehumanpopulat
Trialanderrorarethesourceofourknowledge.A、isB、wereC、hasD、havebeenA本
Eventhoughthemainsourceof______exposureforamajorityofthehumanpopulat
Eventhoughthemainsourceof________exposureforamajorityofthehumanpopu
Trialanderrorarethesourceofourknowledge.A、isB、wereC、hasD、havebeenA时
Thepossibilitiesfor________energysources,includingsolarpower,windpower,
随机试题
[originaltext]Amongwesternrichcountries,peopleintheUnitedStateswor
A.factB.continuouslyC.ignoreD.whenE.muchF.showsG.prevented
HongKong’sEnglishnameis【S1】______fromtwoChinesecharacters,HeungandGong
Technologyisanothergreatforceforchange.Inpart,technologyhascausedthe
三原色学说认为,人体视网膜上存在三种视锥细胞分别对()光最敏感,含有对这三种光
某工程每月所需混凝土量相同,混凝土用量为3200m3,计划4个月完成,混凝土综合
A.增大 B.减小 C.不变 D.不能确定
对贷款环境的区域风险进行评估时,考虑的内容包括()。A.区域自然条件 B.区
《会计基础工作规范》规定,会计机构负责人办理会计工作交接手续时,负责监交的人员应
男性,21岁,因间断右侧腰部疼痛1年入院,B超发现右肾积水6?cm×4?cm,上
最新回复
(
0
)