If a and b are prime numbers, such that a > b, which of the follo

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If a and b are prime numbers, such that a > b, which of the following cannot be true?

A、a+b is prime.
B、ab is odd.
C、a(a-b) is odd.
D、a-b is prime.
E、$$a^b$$ is even.

答案：E

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