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必修1《Reading and vocabulary》新课标PPT课件优质课下载
form
3.When we buy something ,we need
a ______ to weigh it.
balance
4.From the discussion, we can come to
a __________ that we should
protect the environment.
conclusion
5.When we put salt into water, it will _______ quickly.
dissolve
Copper
Gold 金
Iron
Silver 银
Steel
铜
铁
钢
Potassium 钾
Calcium 钙
Aluminum 铝
Magnesium 镁
Sodium 钠
Zinc 锌
1.What is important when we use different metals?