![Therearetwokindsofchanges—chemicalchangeandphysicalchan...]( "Therearetwokindsofchanges—chemicalchangeandphysicalchan...")
- 問題詳情：Therearetwokindsofchanges—chemicalchangeandphysicalchange.Inachemicalchange,thereisalwaysanewsubstance(物質)formed.Breakingupwaterintohydrogen(*氣)andoxygen(氧氣)isachemicalchange.Ineachofthechemicalchangeatleastonenewsubstanceisformed.Achan...
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