问题
单项选择题
支气管扩张症最重要的病变基础是（）
A.支气管相关淋巴组织显著增生
B.支气管壁因炎症遭到破坏
C.肺不张和肺实变
D.肺纤维化
E.支气管发育畸形
答案
参考答案：B
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支气管扩张症最重要的病变基础是（）
A.支气管相关淋巴组织显著增生
B.支气管壁因炎症遭到破坏
C.肺不张和肺实变
D.肺纤维化
E.支气管发育畸形
参考答案：B
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| Many objects that people use each day started with a simple idea. These objects have often changed the way we 1 . Some help us to do a job more 2 . Others fill a need or solve a problem. In 1858, Lipman had such an 3 . He took out a pencil, a piece of paper, 4 an eraser. Then he began to write. Sometimes he needed to 5 a word. Each time he had to search under his books and papers to 6 the eraser." I wish my eraser would stay in one 7 !" he said. Then Lipman had his simple idea. He 8 a groove (凹槽) in one end of the pencil. He glued (粘牢) the eraser into the groove. Lipman had solved his problem. Later he thought that others might like to have such a pencil. So he sold his 9 . Some pencils with erasers were 10 . His design earned $ 100000. | ||||
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