慢性呼衰的一切临床表现的病理基础是：（）
A.呼吸频率快
B.肺瘀血
C.缺氧（或）二氧化碳潴留
D.支气管痉挛
E.呼吸性酸中毒
参考答案：C
下列物质中不属于外源性致热原的为（）.
A.细菌毒素
B.炎性渗出物
C.抗原抗体复合物
D.某些类固醇物质
E.白细胞介素-1
William Sidney Porter, known as O. Henry, is most famous for ().
A. his poems
B. his plays
C. his short stories
D. his novels
