下列哪个句子最符合科技英语写作规范？
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下列哪个句子最符合科技英语写作规范？
A．The loudspeaker, an electroacoustic transducer, converts audio-frequency power into acoustic power.
B．The loudspeaker; an electroacoustic transducer; converts audio-frequency power into acoustic power.
C．The loudspeaker—an electroacoustic transducer, converts audio-frequency power into acoustic power.
D．The loudspeaker—an electroacoustic transducer; converts audio-frequency power into acoustic power.
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