A certain train is traveling at a constant rate. If the train tra

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A certain train is traveling at a constant rate. If the train travels s miles in t hours, in how many hours will the train travel y miles?

A、$$\frac{sy}{t}$$
B、$$\frac{st}{y}$$
C、$$\frac{ty}{s}$$
D、$$\frac{s}{ty}$$
E、$$\frac{s+y}{t}$$

答案：C

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