题目内容

如图所示,若∠1=∠2,则________∥________;若∠3=∠4,则________∥________;若∠5=∠6,则________∥________;若∠7=∠8,则________∥________;若∠BAD+∠ABC=,则________∥________;若∠ABC+∠BCD=,则________∥________

答案:AD,BC,AB,CD,AB,CD,AD,BC,AD,BC,AB,CD
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