单项选择题
空白(1)处应选择()
A.2,4,6,8,10,12,16,18,20,28,30 B.6,2,10,4,8,12,28,30,20,16,18 C.12,2,10,20,6,18,4,16,30,8,28 D.30,10,20,12,2,4,16,6,8,28,18
单项选择题 空白(5)处应选择()