A.transition-delay:none; B.transition-delay:0.3s; C.transition-delay:-1s; D.transition-delay:500ms;
A.transition-timing-function:1s B.transition-timing-function:inease C.transition-timing-function:ease-in D.transition-timing-function:ease-out
A.延遲時(shí)間 B.屬性名 C.持續(xù)時(shí)間 D.速度曲線