首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Experiments in the photography of moving objects______in both the United States and Europe well before 1990.
Experiments in the photography of moving objects______in both the United States and Europe well before 1990.
admin
2013-11-24
60
问题
Experiments in the photography of moving objects______in both the United States and Europe well before 1990.
选项
A、have been conducting
B、were conducting
C、had been conducted
D、are conducted
答案
C
解析
本题是对基本时态和语态的考查。实验是被实施的,所以本题中要用被动语态,其次实验发生在1990年之前,已经是过去完成的事情,因此要用过去完成时,结合选项可知,本题的答案为C。
转载请注明原文地址:https://kaotiyun.com/show/vwmO777K
0
考博英语
相关试题推荐
Vitaminsareagroupofsubstancesfoundinfood.Thebodyneedsthemforlifeandhealth.Sonaturally,manypeopleareconcern
Withincreasingprosperity,WestEuropeanyouthishavingaflingthatiscreatingdistinctiveconsumerandculturalpatterns.
EdithSmithofNewYorkwasconcernedabouther18-month-olddaughter,Amanda.Thedaughterdidnotrespondwhenherparentsspo
Althoughstudentsmaybeina______position,teachersshalltreatthemasequals.
____.explorerscouldneverhavefoundthecave.
Thekidsarehangingout.Theyarenotoldenoughforjobs.Noraretheyrichenoughforcamp.Theyareschoolchildrenwithout
"TheChildisFatheroftheMan,"wrotetheEnglishpoetWilliamWordsworth.111.AdultstodayareasawareasWordsworthofthe
Sinceateacher’sresponseonastudent’spaperispotentiallyaninfluentialtextinawritingclass,weneedtoexamineourpr
Hepeeredoveratthewrithingblacknessthatjerkedconvulsivelywiththejerkingnerves.Itgrewquieter.Thereweresmalltwi
DirtyJobsontheDiscoveryChannel,anunlikelytelevisionprogram,hasbecomeasurprisingsuccesswitha______fanbase.
随机试题
有班级和学生表如题图8所示,班级表的主键是班级编号,学生表的主键是学号、外键是班级编号,且班级与学生表之间创建了参照完整性约束,则能够正确插入学生表的记录是()
A核苷酸在核酸长链上的排列顺序BtRNA的三叶草结构CDNA双螺旋结构DDNA的超螺旋结构EDNA的核小体结构属于真核生物染色质中DNA的三级结构的描述是()
只参与内源性凝血途径的凝血因子是
A.急性化脓性骨髓炎B.颌骨慢性骨髓炎C.放射性骨髓炎D.婴儿骨髓炎E.急性骨髓炎由放射治疗引起的骨髓炎为
下列哪项不是深Ⅱ度烧伤的特点
A.美国B.澳大利亚C.英国D.法国E.荷兰世界上第1个安乐死合法化的国家是
(2013年)企业高层管理人员在制定人力资源规划的过程中应该承担的工作有()。
党的十八届四中全会首次将“依法治国”作为全会主题。“依法治国”这一概念正式提出是在()。
主板又称母板,其中包括CPU、存储器、______插槽以及电源等。
Jepensequ"ilviendra,maisjenepensepasqu"elle_____.
最新回复
(
0
)