without electronic computers,much of today's advanced technology_______.a.would not be achievedb.would not have been achieved请问a和b有什么区别

来源：学生作业帮助网编辑：作业帮时间：2024/11/13 04:29:37

without electronic computers,much of today's advanced technology_______.a.would not be achievedb.would not have been achieved请问a和b有什么区别
without electronic computers,much of today's advanced technology_______.
a.would not be achieved
b.would not have been achieved
请问a和b有什么区别

without electronic computers,much of today's advanced technology_______.a.would not be achievedb.would not have been achieved请问a和b有什么区别
答案：B.
翻译：要是没有电子计算机的话,现在的很多先进的技术就无法获得.
1.此题考查含蓄虚拟条件句.
介词短语without...表示潜在的一种假设,可以换写成相应的if引导的条件状语从句,即：
Without electronic computers = If there were not electronic computers.
2.而主句中的情况也早已经发生即“现在的许多技术已经获得了”,所以这是对过去情况的一种假设.
根据if条件状语从句使用虚拟语气的规定,主句谓语由“would/could/might/should (not) + have done sth”构成,所以答案为B would not have been achieved.
3.A项为对现在情况/动作的虚拟,B是对过去情况/动作的虚拟.
如果是对现在情况的假设,if引导的条件状语从句中的主句谓语由“would/could/might/should (not) do sth”构成.
如：Without your help,I would not be succesful now.
上句中“我成功”是现在的情况,所以主句谓语用would not be successful.

一个是对现在的虚拟假设，一个是对过去的虚拟假设
楼上答得差不多了，高手也会犯错误啊，哈哈

electronic electronic electronic electronic address electronic notification without electronic computers,much of today's advanced technology_______.a.would not be achievedb.would not have been achieved请问a和b有什么区别 without electronic computers ,much of today 's advanced technology(工艺）_______.为什么选择would not have been achieve .have/had not been achieved 错在哪了? 英语翻译Electronic Commerce,commonly known as (electronic marketing) e-commerce or eCommerce,consists of the buying and selling of products or services over electronic systems such as the Internet and other computer networks.The amount of trade c without Without Without without without without without A.electric B.electronic C.electrical D.electricity这四个词的区别是什么啊 So when you open your electronic mail,check the information c irrevocable L/C without our confirmation