单选题If 7y+9 represents an odd integer, which of the following represents the next smaller odd integer?A7(y+1)B7(y-2)C7(y+3)D7(y+2)E7(y-2)+1
单选题
If 7y+9 represents an odd integer, which of the following represents the next smaller odd integer?
A
7(y+1)
B
7(y-2)
C
7(y+3)
D
7(y+2)
E
7(y-2)+1
参考解析
解析：
根据奇整数的排列顺序特点，相邻两奇整数之差为2，因此比7y+9小的相邻奇整数为(7y+9)-2=7y+7=7(y+1)。
根据奇整数的排列顺序特点，相邻两奇整数之差为2，因此比7y+9小的相邻奇整数为(7y+9)-2=7y+7=7(y+1)。
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