单选题 Which of the following is NOT mentioned in the passage as a function of electronics in television transmissions?

A、 The conversion of an image into electronic impulses,
B、 The sending of impulses through a wire cable.
C、 The changing of one image into another image.
D、 The feeding of impulses into a receiver.

【正确答案】 C

【答案解析】[试题分析] 本题考查学生通读文章、熟悉文章内容的能力。
[详细解答] 文章第二段第二句提到了A、B两项中的内容“converting an image into electronic impulses，which can be sent through a wire or cable”第三句讲了D项的内容“These impluses，when fed into a receiver，can then be．．．”而C项的内容，文章没有提到。