题目内容

555时基集成电路的“三五”是什么含义?工作电压为多少?

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dict={1:1,2:'aa','D':'ee','Ty':45}print(dict['D'])

dict={1:1,2:'aa','D':'ee','Ty':45}print(dict.get(2))

dict={1:1,2:'aa','D':'ee','Ty':45}foritemindict.items():print(item)

dict={1:1,2:'aa','D':'ee','Ty':45}forkey,valueindict.items():print(key,value)