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题目： 单选
缺失，缺牙间隙较大，咬合正常，余留牙良好，设计固定义齿修复最理想的基牙是（）.
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- Perhaps no single monument in the USA is as famous as the Statue of Liberty. Standing on a small island in New York Harbor, the crowned lady, holding aloft(在高处)in her right hand the torch of freedom and in her left hand a tablet which is inscribed(雕刻)"July 4th, 1776", is a symbol of American democracy. She is colossal. She is 151 foot high and the pedestal(基座)on which she stands is almost as much. An elevator takes visitors to the top of the pedestal, around which a balcony runs. A spiral(螺旋形)staircase goes up to the crown, and another to the torch. The Statue of Liberty was a gift to the USA from France in 1886, as a mark of friendship and also in memory of the aid France gave the Americans during the American Revolution. For millions of immigrants, the Statue was their first sight of the promised Land, and for a few it was also the last, as they sailed back home again. About a mile from Liberty Island, there is another small island, called Ellis Island, which was looked up on with dread by the immigrants. For it was here that they had to wait their turn to be examined by doctors and officials. Most of the immigrants could not speak a word of English. But only two out of 100 immigrants were refused admission to New York City. Often the person refused turned out to be a grandmother or a weary, frightened girl mistakenly labeled "feebleminded. " Sometimes husbands and wives were parted because one of them happened to have a bad cough and was suspected of having tuberculosis(肺结核). New York City was a bitter disillusionment to some immigrants. Far from being a city paved with gold, it was a city teeming(充满)with overcrowded, unhealthy and unsafe ghettos. The immigrants looked for earlier immigrants of their own national or religion. So Italian, Polish, Irish, Jewish neighborhoods grew up. Because they could not speak English, the newcomers found it difficult to get work at once, and their living quarters were often slums. However, they found in the USA opportunities of bettering themselves. Today immigrants no longer have to endure the indignities(侮辱)of Ellis Island. The grim buildings were closed down in 1924. In 1976, Ellis Island became an historic monument.Which of the following is the best title for this passage? ______A．Gateway to the USA.B．Statue of Liberty.C．Ellis Island.D．Immigrants of the USA.