混合痔
参考答案:指内、外痔静脉丛曲张,相互沟通吻合,使内痔部分和外痔部分形成一整体者。兼有内痔和外痔的双重症状。
______ the chairman of the council, the vice chairman does duty for him.
A.Absent from
B.In the absence of
C.Present from
D.In the presence of
教育哲学属于( )
A.哲学
B.教育学
C.边缘学科
D.综合学科