下列肿瘤标记物何种属内胚窦瘤()
A.CA125
B.CEA
C.AFP
D.β-HCG
E.以上均不对
参考答案:C
解析: AFP是标记内胚窦瘤的常用的指标。
----_____he dropped out of school?
----His family has run into financial difficulties.
A.Why was it that
B.Why was that
C.Why was that it
D.Why was it
选择什么层次和口径的企业收益作为收益法评估企业价值的基础,首先应服从于()。
A.企业价值评估的方法
B.企业价值评估的目的和目标
C.企业价值评估的假设条件
D.企业价值评估的价值标准