下列各项，需与癥瘕相鉴别的病证是（）
A.痛经
B.崩漏
C.尿潴留
D.阴挺
E.带下病
参考答案：C
They ______ the train to Beijing．Otherwise, they would have returned home．
A．need have caught
B．must have caught
C．must catch
D．may catch
湘西土司主要有哪两个？
