政府电子民主管理是属于电子政务发展()模式
A、GtoC
B、GtoB
C、GtoG
D、GtoE
参考答案:A
人参药材来源于()
A.伞形科
B.石竹科
C.豆科
D.毛茛科
E.五加科
Intact buoyancy is a term used to describe().
A.the volume of all intact spaces above the waterline
B.an intact space below the surface of a flooded area
C.an intact space which can be flooded without causing a ship to sink
D.the space at which all the vertical upward forces of buoyancy are considered to be concentrated