This passage mainly discusses how ______. The machine discussed in this passage was the ancestor (祖先) of today’s ______.

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问题 This passage mainly discusses how ______.
The machine discussed in this passage was the ancestor (祖先) of today’s ______.

选项 A、typewriter (打字机)
B、television
C、record player
D、computer

答案D

解析 文章倒数第一句提到,Thus,the great grandfather of the modern computer was born.暗示了它就是计算机的雏形。
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