A.14%,500F.U. B.15%,500F.U. C.14%,1000F.U. D.15%,1000F.U.
A.<480FU B.480FU~520FU C.500FU~520FU D.>520FU
A.形成時(shí)間 B.穩(wěn)定時(shí)間 C.斷裂時(shí)間 D.揉和時(shí)間