nsefc module 8
学案二
get to know some necessary background knowledge:
introduction to the unit:
inventing is a scientific activity because it uses the same procedures as scientific experiment. it is also a creative activity. so to be a good inventor, you need to be imaginative as well as disciplined in your approach. one of the important aims of this unit is to identify and set out the资源难易程度:★★★★★★★★★★★★★★★
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