A:a2•a3=a6
B:(﹣2ab)2=4a2b2
C:(a2)3=a5
D:3a3b2÷a2b2=3ab
优良班风的形成靠的是( )
请完成如图所示的概念图.
①____
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Mrs. Green didn't talk to her husband for a long time, but now they ____ each other.