首页
登录
职称英语
If computers______, many problems on space flight could not have been solved.A、h
If computers______, many problems on space flight could not have been solved.A、h
游客
2023-11-01
65
管理
问题
If computers______, many problems on space flight could not have been solved.
选项
A、had not been invented
B、are not invented
C、were not invented
D、have not invented
答案
A
解析
译文:如果没有发明计算机的话,太空飞行的许多问题就不可能解决。虚拟语气题。本题考查与过去事实相反的虚拟语气,其结构为“从句:If+主语+had+动词过去分词;主句:主语+should/would/might/would+have+动词过去分词”,故本题选[A]。
转载请注明原文地址:https://tihaiku.com/zcyy/3149331.html
相关试题推荐
Therearestillmanyproblemsaheadofus,butbythistimenextyearwecansee
Thelatestdiscs,usedforsmallportablecomputers,______3,600timesaminute.A
Itisnotuncommonforthere______problemsofcommunicationbetweentheoldand
Firmsthatusecomputershavefoundthatthenumberofstaff______isneededfor
Thecommitteehasanticipatedtheproblemsthat______intheroadconstructionp
Itwasrecommendedthatpassengers______smokeduringtheflight.A、notB、needn
______you______furtherproblemswithyourprinter,contactyourdealerforad
TheInternet,cellphones,palmtopcomputersandotherdigitaltechnologyallows
Sheremainsconfidentand______untroubledbyourpresentproblems.A、indefinite
TheInternet,cellphones,palmtopcomputersandotherdigitaltechnologyallows
随机试题
Readthearticlebelowaboutcustomerrelationshipmanagement.Choosethecorrec
Ifyouareayoungcollegestudent,mostofyour【B1】______aboutyourhealth
春节是中国的传统节日,相当于美国的圣诞节。美国小孩能从圣诞老人那里获得圣诞礼物,而中国小孩则能从长辈那里得到“压岁钱(luckymoney)”,这也是每个孩子
About25millionautoaccidentsoccurintheUnitedStateseachyear.Appro
Womendriversaremorelikelytobeinvolvedinanaccident,accordingtosc
Beforeinvestingincommonstocks,oneshouldbeawareofboththeiradvanta
A.(1),(2) B.(2),(3) C.(1),(3) D.全对
不符合弥漫性系膜硬化肾病的临床表现是A.可作为DENYS-DRASH综合征的一部
A.产后恶露不绝 B.产后身痛 C.产后发热 D.产后自汗 E.产后缺乳
严重的高血钾常见的致死原因是A:休克 B:心脏骤停 C:急性肾衰竭 D:呼
最新回复
(
0
)