4,Treasury Bond is a marketable, fixed-interest U.S. government debt security with a maturity of more than 10 years. Treasury bonds are usually issued with a minimum _______of $1,000.
【参考答案】美国国债（Treasury Bond）是一种市场化的固定收益美国政府债务证券，其到期时间通常超过10年。美国国债通常以最......
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