Which of the following best describes the relation of the first paragraph to the passage as a whole?
It makes a general observation to be exemplified.
It outlines a process to be analyzed.
It poses a question to be answered.
It advances an argument to be disputed.
It introduces conflicting arguments to be reconciled.
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正确答案是 A。 第一段的目的是对整篇文章做出一个宽泛的观察,并以1975年 Beta 格式 VCR 作为例子来说明这个观察。