2002年11月22日
Now, here are my answers to those pop quizzes.
Hope I got them right. ^_^ V
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先開switch A, 過了一段時間後 turn if off.
再開switch B. 上樓看.
亮的燈泡是controlled by switch B.
燙的+不亮的is controlled by switch A.
冷的+不亮的is controlled by switch C.
5元+50元.
(其中一個不是5元呀~~是50元.)
posted by Biochemie on 5:11 下午
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