下列哪项肿瘤标记物最常用于卵巢上皮性癌的诊断
A.酶标记物
B.雌激素
C.hCG
D.CA125
E.AFP
参考答案:D
The question is bound to _________ at the meeting to be held next week.
A.come about
B.come up
C.come up with
D.come across
人的体细胞有23对染色体,细胞分裂后,产生的新细胞中染色体数目为[ ]
A.46条
B.23条
C.47条
D.46对