第15题: [单项选择]下面哪项不是哮喘的发病机理 A. 气道慢性炎症 B. 支气管平滑肌痉挛 C. 肺部血液循环障碍 D. 气道粘液分泌增加 E. 炎症细胞浸润 参考答案:C
第16题: [单项选择]This is the second letter that he ______ his brother recently. A. has got to B. has heard of C. has received from D. has heard from 参考答案:C 答案解析:此题检测对短语to receive from和to hear from的掌握情况。可以说to receive a letter但不能说hear from a letter,只能说to hear fro
第17题: [单项选择]原发性肺脓肿最常见感染的细菌是() A. 大肠杆菌 B. 葡萄球菌 C. 粪球菌 D. 厌氧菌 E. 星形诺卡菌 参考答案:D 答案解析:原发性肺脓肿,即吸入性肺脓肿,病原体多为厌氧菌。病原体经口、鼻、咽腔吸入致病发病的部位右侧多于左侧,下部多于上部。血源性肺脓肿最常见的致病菌是金黄色葡萄球菌。