对卵巢癌诊断最好的指标是()。
A.CEA
B.BJP
C.降钙素(CT)
D.组合指标CEA、HCG、CA125
E.组合指标CEA、HCG、CA199
参考答案:D
—Bob is ______ eight-year-old boy. But he knows a lot about Chinese history.
—How clever he is! [ ]
A. a
B. an
C. the
D. /
年金保险按给付额是否变动可划分为( )和变额年金。
A.增额年金 B.减额年金 C.流动年金 D.定额年金