45题 最后一段\n46题 最后一段最后一句The Mint also released five collectible coins that sell for more than their face value. Special editions of the four penny designs were produced with the metal content used in 1909: a mix of 95 percent copper and 5 percent tin and zinc. In addition, in the world of \"bigger\" money, 2009 has brought the Lincoln Commemorative One-Dollar Coin — made up of 90 percent silver and 10 percent copper — with an image that has a Gettysburg Address theme.