If $$xy\neq0 $$and $$=(\frac{1}{4})y$$, then the ratio of 4x to 4

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If $$xy\neq0 $$and $$=(\frac{1}{4})y$$, then the ratio of 4x to 4y is

A、$$\frac{1}{4}$$
B、$$\frac{1}{1}$$
C、$$\frac{4}{1}$$
D、$$\frac{8}{1}$$
E、$$\frac{64}{1}$$

答案：A

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