题目内容

3．听第10段材料，回答第17至20题．
17．How was Baylis's radio powered？
A．By electricity．
B．By batteries．
C．By hand．
18．What does the speaker say about the mobile phone invented by Baylis？
A．It is powered by people's walking．
B．It contains a small battery in itself．
C．It is produced in South America．
19．What is the educational background of Baylis？
A．He majored in engineering at university．
B．He doesn't have a high level of education．
C．He is a high school graduate．
20．How did Baylis gain his ideas？
A．He worked hard for them．
B．They came to him by chance．
C．Other people inspired him a lot．

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解答 CABB

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