关于食管癌的基本X线征象的说法,错误的是()
A.黏膜皱襞紊乱、破坏
B.不规则腔内充盈缺损
C.管壁僵直,蠕动消失
D.纵隔内软组织肿块
E.恶性溃疡龛影
参考答案:D
_______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties.
A.It; whom
B.As; whose
C.As; whom
D.It; whose
中国人民银行为社会提供低成本,大业务量的支付清算服务而建设的支付系统称为()。
A.大额支付系统
B.小额支付系统
C.电子银行
D.系统内联行