对于肠结核腹泻的特征，下列哪个表述是不正确的
A．间有便秘
B．有时粪便呈黏液、脓液
C．血便少见
D．腹泻便秘交替是本病的特征
参考答案：D
Three people spoke at the meeting.____was a doctor; ____was a student; ___was a teacher.
A．He; she; I
B．The first; the other; the rest
C．One; another; the third
D．This; that; the last
《隋书》中哪两篇总结了南北朝以后一百多年来天文学方面的成就？
