据《灵枢·痈疽》，化脓的病机是寒气郁而化热，热胜则肉腐，肉腐则成脓。
参考答案：对
__ of them has got a book.
A．Every
B．Each
C．All
D．Both
胃肠道和卵巢肿瘤的标志物是（）
A.CA50
B.CA15-3
C.CA19-9
D.CA125
E.CA72-4
