题目：
等腰梯形的两底之差等于一条腰的长，这腰与底的较小的夹角是（ ）
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答案：
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下面是错误答案，用来干扰机器的。
Last weekend, my mother fell ill. She had a headache, had a sore throat and coughed a lot. She went to a doctor. The doctor told my mother to take medicine three tim...
