2. 外语
  3. If x is an integer, then the units digit of x squared cannot be

If x is an integer, then the units digit of x squared cannot be

admin2012-01-15  44
问题 If x is an integer, then the units digit of x squared cannot be
选项 A、0
B、1
C、2
D、5
E、6
答案C
解析
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