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Modern TVs use many of the ________ firs...

Modern TVs use many of the ________ first discovered by Farnsworth.

A.principles B.principals C.probabilities D.prohibitions

 

A 【解析】 考查名词辨析。句意:现代电视机使用了许多由法恩斯沃斯首先发现的原理。A. principles原则,原理;B. principals大学校长,负责人;C. probabilities可能性;D. prohibitions禁令,禁律。现代电视机使用了许多由法恩斯沃斯首先发现的原理。故选A。
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