5a1322轴对称、平移、旋转61ax2y247x031448
8AB＝DC或∠ACB＝∠DBC
92xy10等1018DCBDDDCCC19⑴4x28x820略23⑴a2b24①999621略⑵
1m22
2253
⑶ab2ba2ba
⑷x3
⑵abab②101200
⑶ababa2b2
24⑴方案1：甲25台，乙25台；方案2：甲35台，丙15台⑵选方案2
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