城市道路横断面是指道路中心线的法线方向断面，它由车行道、人行道、分隔带、绿地等组成。城市道路横断面的类型包括( )。
A．全填式、半填半挖式、路堑式
B．双车道、四车道、六车道、八车道
C．直线形、抛物线形、直线加抛物线形、直线加圆曲线形
D．一块板、两块板、三块板、四块板
参考答案：D
解析： 城市道路横断面的类型包括一块板、两块板、三块板、四块板。
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| A hobby can be almost anything that a person likes to do in his spare time. Hobbyists raise pets, watch birds, paint pictures, play the piano and grow flowers. 1_____ They collect everything from books to butterflies and from boxes to stamps. People take up hobbies because these activities offer enjoyment, friendship and relaxation. Hobbies help people relax after a long time of hard work, and provide a balance (平衡) between work and play. Hobbies offer interesting activities for the old. Some hobbies can make a child grow as a person, develop his interest and help him learn new skills. 2_____ Doctors have found that hobbies are useful in helping patients (病人) recover (恢复) from illness. Hobbies give patients who can't move around something to do, and provide interests that keep them from thinking about themselves. Many hospitals treat (治疗) patients by having them take up interesting hobbies. 3_____ In early times, most people were too busy making a living to have many hobbies. But some persons who had spare time did enjoy hobbies. 4_____ People today have more time than ever before for hobbies. Machines have now reduced much time that people must spend on their jobs. 5_____ Those who have developed hobbies never need to worry about what to do with their newly-found free time hours. Sir William Osler, a famous Canadian doctor expressed the value (价值) of hobbies by saying, "No man is really happy or safe without a hobby."
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