听力原文：In the United States, the Federal Gold Reserve acts as the central bank.(2)A．In the US, the Federal Gold Reserve acts as the central bank.B．In the US, the central bank is the commercial bank.C．In the US, there is no central bank.D．In the US, the cent

听力原文：In the United States, the Federal Gold Reserve acts as the central bank.

(2)

A．In the US, the Federal Gold Reserve acts as the central bank.

B．In the US, the central bank is the commercial bank.

C．In the US, there is no central bank.

D．In the US, the central bank is not so important.