6,7,5,8,4,9,()
A.5
B.10
C.3
D.4
6,7,5,8,4,9,()A.5B.10C.3D.4
6,7,3,0,3,3,6,9,5,()A.1B.2 C.3D.4
6,7,5,8,4,9,()A.5B.10 C.3D.4
6,7,5,8,4,9,()A.5B.10C.3 D.4
(3/4+1/5)+(4/5+1/6)+(5/6+1/7)+(6/7+1/8)+(7/8+1/9)+(8/9+1/10)=()。A.6.05B.5.65C.5.35D.5.05