卵巢黏液性交界瘤中,能预测复发的肿瘤标记物为()。
A.CA125
B.AFP
C.hCG
D.LDH
E.CA19-9
参考答案:E
Peter was _______ tired that he couldn't continue running. [ ]
A. very
B. too
C. so
在制图中,把承受影子的面称为()
A、投影中心
B、投影线
C、投影面
D、投影法