Until recently, mobile radio was to wireless communications what the Yugo was to transportation. With a mixed clientele ranging from truckers using CBs to police armed with walkie-talkies to taxi drivers dispatched by radio, it was viewed as an unglamorous business and a technological backwater.
But specialized mobile radio, as it is known, has been rediscovered. It is now considered one of the biggest prizes in the all-out war for the public airwaves. The reason: high-tech companies have figured out how to profitably rebuild the antiquated dispatching system into an advanced cellular-telephone network that can take on the likes of AT & T and the giant Baby Bells. Upstart Nextel Communications sent shock waves through the industry last week when it agreed to buy Motorola’s SMR frequencies for $1.8 billion.
That could pose a serious threat to cellular hegemony. Although both systems are based on the same basic technology, SMR systems are digital and cover
A. enthusiasm about competition
B. dubious technological standards
C. exaggeration of product features
D. awkward marketing strategies
Until recently, mobile radio was to wireless communications what the Yugo was to transportation. With a mixed clientele ranging from truckers using CBs to police armed with walkie-talkies to taxi drivers dispatched by radio, it was viewed as an unglamorous business and a technological backwater.
But specialized mobile radio, as it is known, has been rediscovered. It is now considered one of the biggest prizes in the all-out war for the public airwaves. The reason: high-tech companies have figured out how to profitably rebuild the antiquated dispatching system into an advanced cellular-telephone network that can take on the likes of AT & T and the giant Baby Bells. Upstart Nextel Communications sent shock waves through the industry last week when it agreed to buy Motorola’s SMR frequencies for $1.8 billion.
That could pose a serious threat to cellular hegemony. Although both systems are based on the same basic technology, SMR systems are digital and cover
A. Its technological features have radically changed
B. It has been rebuilt to cater to various subscribers
C. Its dimensions have been reduced by wide margins
D. It was connected to a greater variety of services
| Until recently, mobile radio was to
wireless communications what the Yugo was to transportation. With a mixed
clientele ranging from truckers using CBs to police armed with walkie-talkies to
taxi drivers dispatched by radio, it was viewed as an unglamorous business and a
technological backwater. But specialized mobile radio, as it is known, has been rediscovered. It is now considered one of the biggest prizes in the all-out war for the public airwaves. The reason: high-tech companies have figured out how to profitably rebuild the antiquated dispatching system into an advanced cellular-telephone network that can take on the likes of AT & T and the giant Baby Bells. Upstart Nextel Communications sent shock waves through the industry last week when it agreed to buy Motorola’s SMR frequencies for $1.8 billion. That could pose a serio A. Its technological features have radically changed. B. It has been rebuilt to cater to various subscribers. C. Its dimensions have been reduced by wide margins. D. It was connected to a greater variety of services. [单项选择]It was not until 1920 （ ） regular radio broadcasts began.
A. that B. since C. when D. while [简答题]
THE HISTORY OF COMMUNICATION TECHNOLOGY 1 Communication technology influences the ways in which we think about the world．It changes the things we think about，the symbols we use to form and communicate ideas, and the arenas in which our thoughts develop．In the history of communication, there have been many revolutionary technologies, among them the printing press in the fifteenth century and electronic media in the nineteenth century． 2 The development of writing was a major advancement in the ability to communicate over distances and to preserve information accurately．Writing conveyed knowledge of the arts and sciences, which provided foundations for other areas of investigation．However, before books and the printing press, written language was limited to a few clay tablets and parchment scrolls．It was not until books became available that writing made a major impact．For centuries，books were rare and expensive because ea [单项选择]Passage 3
Listening is an extremely complex communicative activity. In order to have a better understanding, to anticipate what is coming is very important. An effective listener should continuously develop more or less specific readiness for what will come next. If a listener hears what he has expected, it will be much easier for him to receive the information. But if what he hears is totally out of his expectation,he will fail to get the message. The skill to anticipate what is coming in listening comprehension depends largely on the listener’s familiarity with the theme(主题)of the message. It also depends on the listener’s knowledge of the speaker as well as the situation. Obviously, when we listen to something that we already have some information about, it is generally much easier for us to take in the new information . Therefore,pre-listening preparation seems to play an important role in increasing our comprehension . Before actual listening ,we could perhaps first gi A. the listener’s emotion B. the difficulty of the message C. the listener’s communicative skills D. The listener’s familiarity with the topic 我来回答: 提交
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