【名词&注释】
乳腺癌(breast cancer)、胰腺癌(pancreatic cancer)、致病菌(pathogenic bacteria)、血液循环(blood circulation)、肺脓肿(lung abscess)、淋巴管(lymphatic)、肺结核空洞(pulmonary tuberculous cavity)、血源性感染(hematogenous infections)
[单选题]无尿是指24小时尿量小于
A. 100ml
B. 200ml
C. 50ml
D. 10ml
E. 250ml