呼吸音的监测，不包括（）
A.胸部听诊
B.鼻孔气流听诊
C.螺纹管听诊
D.食管听诊
E.腹部听诊
参考答案：E
谈谈清代实行“地丁银”的背景、内容和意义，并分析它与“一条鞭法”的关系。
Questions 15～18
A. It has a population of two million people. B. Its tourist industry accounts for 8% of its GDP. C. Most of its residents are of British origin. D. Most of its income comes from tourism.
