When a machine analyses the frequencies used by a particular voice and draws a graph of them, sound is ________electronically in

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问题 When a machine analyses the frequencies used by a particular voice and draws a graph of them, sound is ________electronically into a pattern of lines.

选项 A、relieved
B、converted
C、magnified
D、burst

答案B

解析 动词辨义。convert意为“转变,转换”,如:Heat converts water into steam.(热使水变为蒸汽。)re lieve意为“减轻,解除”,如:This remedy will relieve the pain.(这种治疗将会减轻痛苦。)magnify意为“放大”,如:The microscope magnified the object one hundred times.(显微镜把物体放大了一百倍。)burst意为“爆炸,破裂”,如:The boiler burnt.(锅炉爆炸了。)根据题意,声音被转化为线状模式,故选B)。   
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