选择题:(阅读理解题)Anny sat in their backyard(后院), thinking. S

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(阅读理解题)
Anny sat in their backyard(后院), thinking. She was trying to think of a way to earn money during the summer vacation. Suddenly, she had an idea! Her parents paid her to walk their dog every day. Maybe other people would pay her to walk their dogs. 
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慢性肺心病急性加重期的最常见诱因是( )(本题2.0分)A. 过劳B. 大量利尿C. 使用镇静剂D.

慢性肺心病急性加重期的最常见诱因是( )(本题2.0分)A. 过劳B. 大量利尿C. 使用镇静剂D. 呼吸道感染E. 使用支气管扩张剂

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