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  3. Since 1875, when Alexander Graham Bell first discovered how to send the human vo

Since 1875, when Alexander Graham Bell first discovered how to send the human vo

游客2024-01-11  64
问题 Since 1875, when Alexander Graham Bell first discovered how to send the human voice along wires, the telephone has been one of the world’s most utilized and essential methods of communication. The first telephone exchange in America was established in 1878 and served a total of 21 people. At that time, operators would answer a call and connect two parties by completing an electrical circuit. Little could those operators envision that, one century later, calls would be transmitted along optical fibers and, soon after, would become totally wireless and portable. The idea of orbiting satellites picking up millions of calls and relaying them across the planet would have been unimaginable. [br] It can be inferred from the passage that
选项 A、satellites transmit telephone calls
B、early telephone users were frustrated by the technology’s inefficiencies
C、wireless telephones are preferable to land-based lines
答案 A
解析 The best answer is A. The last sentence supports choice A. The passage doesn’t indicate that early users were frustrated by inefficiency(as opposed to being amazed that it worked at all), nor does it give a preference for land-based vs. wireless technology.
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