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If x is a rational number and y is an irrational number, which of the following statements must be true?
Indicate all such statements.
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A.$$x+\sqrt{2}$$ is a rational number.
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B.$$x+\frac{1}{4}$$ is a rational number.
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C.$$x+y$$ is an irrational number.
B,C显示答案
