[解題] 八年級 理化(波動與聲音)
1.年級：八年級
2.科目：自然
3.章節：第3章 波動與聲音
4.題目：
http://ppt.cc/92H9
5.想法：
因為只有完整振動一次
形成一個全波
之後波繼續向右前進
所以覺得答案應該是B
但家教妹妹說
學校老師強調是C.... QQ
哪位強者能夠指點迷津呢?
非常感謝!!
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11/20 22:21, , 1F
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※ 編輯: hsyung (140.109.231.192), 11/20/2014 22:28:38
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11/21 17:44, , 32F
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11/22 17:30, , 38F
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11/24 00:45, , 42F
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11/24 00:46, , 44F
11/24 00:46, 44F
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