上皮性卵巢癌的监测指标是()
A．CA125
B．AFP
C．CEA
D．HCG
E．E2
参考答案：A
He told me that he had two girl-friends, neither of _______ knew anything about the other.
A．whom
B．them
C．which
D．who
没有签订购销合同或未订明托收承付结算方式购销合同款项的，承付人在承付期内可以向银行提出全部或部分拒绝付款。（）
