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Modem TVs use many of the ________ first...

Modem TVs use many of the ________ first discovered by Farnsworth, who contributed a lot to the development of TV

A.platforms B.principles C.sources D.symptoms

 

B 【解析】 考查名词词义辨析。句意:现代电视使用了最初由Farnsworth发现的许多原理,他对电视的发展做出了很大贡献。A. platforms平台;B. principles原则;C. sources来源;D. symptoms症状。根据句意可知,现代电视利用了由Farnsworth发现的原理,故选B。  
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