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。
The first mobile phone was the Motorola DynaTAC 8000x, not the iPhone. The DynaTAC 8000x was released in 1983 and marked a significant technological advancement, while the iPhone, released much later, revolutionized the smartphone industry. The first commercially available mobile phone was the Mo...
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...
【题目】The first mobile phone was invented in the USA ___. A.in 1970sB.in the 1970s'C.in the 1970s 试题答案 在线课程 【答案】C 【解析】 句意:第一部手机是在20世纪70年代的美国发明的。 in the+世纪百位进数+十位年代数+s,固定搭配,在...世纪...年代,故答案选C。 练习册系列答案 同...
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,...
7.据我所知,第一部手机是马丁库珀在世纪70年代发明的。duid___the first mobile phone___Martin Cooper in 相关知识点: 试题来源: 解析 【答案】As far as I know, was invented by【核心短语/词汇】as far as I know据我所知【解析】根据句意:据我所知,第一部手机是马丁库珀在世纪70年代发明的。可知...
改写后的解析 第一题: "The first mobile phone" 指的是第一部手机,"Martin Lawrence Cooper" 是发明者,"1973" 是年份。因此,句子应为 "The first mobile phone was invented by Martin Lawrence Cooper in 1973." 第二题: "That systems" 指的是那些系统,"can" 表示能力,"transfer the heat into" 表示...
The firstmobile phoneservice, for 80-pound telephones installed in cars, wasdemonstrated on June 17, 1946, 75 years ago. The service was only available inmajor citiesand highway corridors and was aimed at companies rather than individuals. The equipment filled much of a car's trunk, and subs...
a第一 手机的主要功能就是方便交流。如果你的旧手机还能打电话 发信息 。为什么要换手机呢 The first handset main function facilitates the exchange.If your old handset also can telephone sends the information.Why has to trade the handset[translate]...
50th Anniversary of the First Mobile Phone Call is April 2023. Find out the story behind the call & discover the history of the mobile phone