单项选择题
-1/22,-1/33,-1/44,________()A.1/52B.-1/5C.-1/55D.-1/54
单项选择题-1/22,-1/33,-1/44,________()
A.1/52 B.-1/5 C.-1/55 D.-1/54
-2, -2, 0, 0, 2, 2, 4,________ ( )A.2B.4C.0D.-2
单项选择题-2, -2, 0, 0, 2, 2, 4,________ ( )
60,120,210,__________ ( )A.320B.350C.330D.360
单项选择题60,120,210,__________ ( )