问题
单项选择题
If x is an even integer and y is an odd integer, then which of the following is an even integer ？（）
A.x2+y
B.x2-y
C.（x2）（y）
D.x+y
E.x-y
答案
参考答案：C
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If x is an even integer and y is an odd integer, then which of the following is an even integer ？（）
A.x2+y
B.x2-y
C.（x2）（y）
D.x+y
E.x-y
参考答案：C