单项选择题
A.6/6 B.6/7 C.7/6 D.5/7
7 14 23 34() A.47 B.49 C.57 D.45
单项选择题7 14 23 34()
A.47 B.49 C.57 D.45
1/5 2/25 3/125 () A.4/3125 B.4/250 C.6/750 D.4/625
单项选择题1/5 2/25 3/125 ()
A.4/3125 B.4/250 C.6/750 D.4/625
1 2 4 8 16() A.32 B.24 C.64 D.48
单项选择题1 2 4 8 16()
A.32 B.24 C.64 D.48