Our project must proceed at a reasonably quick tempo. Surely one month is ample time, ( )

A.isn't it



B.is it
C. it isn't



D. it is

关于黏液性水肿，正确的是（）

A.为非凹陷性水肿

B.是长期营养缺乏所致

C.四肢末端较明显

D.见于肢端肥大症

E.月经前期明显