[國中] 濾紙撕角一問
書上都寫濾紙折好後要撕去一角
我照著折之後發現濾紙外和濾紙內都有一個角,是要撕哪一個?
另外這樣撕了後濾紙會具有哪些優點嗎,@@?
我內外兩個角都撕了後覺得好像沒差多少,ORZ
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