問題詳情

Questions 38 - 40One of the problems of owning a cell phone is that it must be charged from time to time.But this could soon be a thing of the past. A scientist in South Korea, Dr. Sang-Woo Kim, has founda way to charge a cell phone using the human voice. Soon you might be able to recharge your phonejust by talking into it. When people talk, their voices produce energy in the form of sound waves.Dr. Kim has invented a machine, small enough to fit inside a cell phone, which changes thosesound waves into energy. Dr. Kim is hoping to see his new idea used in future phones. In thenear future, charging your phone and talking with a friend could be one and the same.
38. What did Dr. Kim invent?
(A) A new way to power a cell phone
(B) A new way to talk on a cell phone
(C) A new way to repair a cell phone
(D) A new way to send emails with a cell phone

參考答案

答案：A
難度：適中0.615385
統計：A(16),B(7),C(2),D(1),E(0)

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