invent发明,动词原形;invented发明,过去式;is invented被发明,一般现在时的被动语态;was invented被发明,一般过去时的被动语态。根据“in April, 1973”,可知本句用一般过去时;根据主语“The first mobile phone”与动词“invent”的关系,可知用被动关系,所以一般过去时的被动语态。故选D。
解析 invent发明,动词原形;invented发明,过去式;is invented被发明,一般现在时的被动语态;was invented被发明,一般过去时的被动语态。根据"in April,1973",可知本句用一般过去时;根据主语"The first mobile phone"与动词"invent"的关系,可知用被动关系,所以一般过去时的被动语态。故选:D。
Home Quick Facts World’s first mobile phone – Motorola DynaTAC 8000X The first commercially available cell phone was Motorola’s DynaTAC 8000X. It took 10 hours to charge the device which gave 30 minutes of talk time. The world’s first call from a mobile phone was made using this ...
Instead of relying on base stations with separate cells (and the signal being passed from one cell to another), the first mobile phone networks involved one very powerful base station covering a much wider area. Motorola, on 3 April 1973 were the first company to mass produce the first handh...
The world's first mobile phone, Motorola DynaTAC 8000X, was approved by the U.S. FCC on 21 September 1983.
The first mobile phone by Dr. Martin Cooper in 1973. A.invented B.is invented C.was invented相关知识点: 试题来源: 解析 C 考查一般过去时的被动语态。句意:1973年第一部手机被博士Martin Cooper发明出来了。根据提示词in 1973,可知应使用一般过去时;句子主语the first mobile phone是动作invent的承受者,...
New words mobile phone n.移动电话;手机electronics [r,lek'tronrks] n.电子学San Francisco [saen fraen'sIskou] n.旧金山)Read and answer.读短文,根据短文内容回答问题。1. Who invented the first mobile phone?Martin Cooper did. Martin Cooper invented the first mobile phone2. When and where was ...
Title: My First Mobile Phone In the realm of technological advancements, mobile phones have emerged as indispensable gadgets, seamlessly integrating into our daily lives. Recalling my first mobile phone brings back a flood of nostalgia, marking a significant milestone in my digital journey. This essa...
欢迎收听电子音频内容《雅思口语5月Part2新题答案:Describe your first mobile phone》,你可以在线听书也可以下载喜马拉雅APP播放,想收听更多更优质的有声读物小说故事音乐作品,就来喜马拉雅!
Since 1973 we got the first mobile phone in the world, it has become a crucial part of our daily life nowadays. Mobile phones have changed vastly, both in design and function. Today, let’s take a ride back to the past and look at the different “first” mobile phones in the world,...