[单项选择]

患者男性，62岁，反复咳嗽咳痰25年，每于冬季发作，静滴抗生素可缓解。查体：桶状胸，语音共振减弱；双肺叩诊过清音，肺下界下移且移动度变小，双肺可闻及湿啰音及哮鸣音。

该患者诊断考虑为
A. 肺癌
B. 支气管扩张
C. 慢性支气管炎并阻塞性肺气肿
D. 肺结核
E. 支气管哮喘

(B)
You can tell the age of a tree by counting its ring. But these records of a tree’s life really say a lot more. Scientists are using tree ring to learn what’s been happening on the sun’s surface for the last ten thousand years. Each ring represents a year of growth. As the tree grows, it adds a layer to its trunk, taking up chemical elements from the air. By looking at elements in the rings from a certain years, scientists can tell what elements were in the air that year. Dr. Stevenson is analyzing one element, carbon-14, in ring from both living and dead tree. Some ring go back almost ten thousand year to the end of the Ice Age. When Stevenson followed the carbon-14 levels changed with the intensity of solar burning. You see, the sun has cycles. Sometimes it bums fiercely, and at other times it is relatively calm. During the sun’s violent periods, it throw off charged particles in fast moving streams cal
A. give away
B. cast
C. send for
D. get rid of