患者，男，45岁。吸烟20年，有喘息、咳嗽症状，普通胸片未发现明显异常，支气管舒张试验阳性。最可能的诊断是
A．心源性哮喘
B．支气管哮喘
C．嗜酸细胞性肺炎
D．COPD
参考答案：B
解析： ①支气管舒张试验(bronchial dilation test，BDT)：a．用以测定气道气流受限的可逆性。b．常用吸入型的支气管舒张药有沙丁胺醇、特布他林等，如FEVI较用药前增加＞15%，且其绝对值增加＞200ml，可诊断为舒张试验阳性。②支气管哮喘：a．多在儿童或青少年期起病，以发作性喘息为特征，发作时两肺布满哮鸣音，缓解后症状消失，常有家庭或个人过敏史。b．哮喘的气流受限多为可逆性，其支气管舒张试验阳性。
| 阅读下列两篇短文，从各小题所给的四个选项中选出能够回答所提问题或完成所给句子的最佳答案。 | ||||||||
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| 1. Annie gets _____ progress in learning English. | ||||||||
| A. excellent B. poor C. good D. alittle | ||||||||
| 2. Which of the following sentences is NOT true? | ||||||||
| A. Annie is a Crade 9 student. B. Annie is a lazy student in Thomas's opinion. C. Annie gets some of the English skills. D. Annie does better in German than geography. | ||||||||
| 3. Annie does worst in _____. | ||||||||
| A. math B. history C. science D. English | ||||||||
| 4. Annie's vacation will last _____. | ||||||||
| A. about one month B. more than two months C. over two months D. less than one month | ||||||||
| 5. There are _____ of Annie's classmates doing betterthan her in her class. | ||||||||
| A. none B. five C. ten D. one | ||||||||