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
2023-12-26
46
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/3307792.html
相关试题推荐
Wheredoesmostoceanplasticcomefrom?A、Industrialwastesources.B、Household
Wearecurrentlygrowingataratethatisusinguptheearth’sresourcesfarfa
Eventhoughthemainsourceof______exposureforamajorityofthehumanpopul
Trialanderrorarethesourceofourknowledge.A、isB、wereC、hasD、havebeenA时
Thesoldiersofpeace-keepingforcearetall,robustand,aboveall,resourceful
Trialanderrorarethesourceofourknowledge.A、isB、wereC、hasD、havebeenA时
Trialanderrorarethesourceofourknowledge.A、isB、wereC、hasD、havebeenA本
Eventhoughthemainsourceof______exposureforamajorityofthehumanpopulat
Thepossibilitiesfor______energysources,includingsolarpower,windpower,ge
Thepossibilitiesfor________energysources,includingsolarpower,windpower,
随机试题
Bysayingthatvillageisnotdead,but"villagelife"isdead,thewritersugge
ProfessorWang,havingbeenknownforhisinformativelectures,waswarmlyrecei
AlmosteverydaythemediadiscoversanAfricanAmericancommunityfighting
"You",intheTimemagazine"PersonoftheYear2006",refersto______[br][or
Whenandwheretobuildthenewfactory(notdecide)______sofar.hasn’tbeendeci
椭圆囊与球囊的囊斑的适宜刺激是( )A.正角加速运动 B.负角加速运动
根据《关于进一步规范房屋建筑和市政工程生产安全事故报告和调查处理工作的若干意见》
Thechangeinthatvillagewasmiraculou
应激时交感-肾上腺髓质系统兴奋所产生的防御性反应,以下不正确的是A:心率增快
明洞主要分为拱式明洞和( )明洞两类。A.端墙式 B.棚式 C.环框式
最新回复
(
0
)