[問題] 國中理化很奇怪的題目
是非題
1.酒精燈使用時為維持火焰的大小須保持酒精的高度在2/3~1/2之間
2.精製粗鹽的實驗中,所有過程都是物體變化,沒有化學變化
3.利用結晶法得到的物質,一定具有固定的熔點與沸點
以上三題的「正確」答案,分別是(X)(O)(X)
我覺得很奇怪= ="
希望各位可以幫忙解答,謝謝!
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