金屬筒內裝有與外界溫度相同的壓縮空氣，打開筒的開關，筒內高壓氣體迅速向外逸出，待筒內外壓強相等時，立即關閉開關。在外界保持恆溫的條件下，經過一段較長的時間后，再次打開開關，這是出現的現象是？
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【單詞】
My first letter is in wood but isn't in wolf
My second is in four and also in three,
My third is in music and also in tune,
My fourth is in May but isn't in June.
My whole makes a noise,
What am I?
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單詞
最後修改於 2019-09-13 20:07:52
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