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导爆索的爆速为（）m/s。
下列疾病中属于心身疾病的是（）
Passage 2As regards social conventions，we must say a word about the wel-known English class system. This is an embarassing subject for English people，and one they tend to be ashamed of，though during the present century class-consciousness has grown less and less，and the class system less rigid. But it still exists below the surface. Broadly speaking，it means there are two clases，the"middle class"and the"working class”.（We shall ignore for a moment the old“upper class"，including the hereditary aristocracy，since it is extremely small in numbers；but some of its members have the right to sit in the House of Lords，and some newspapers take surprising interest in their private life.）The middle class consists chiefly of well-to-do businessmen and professional people of all kinds. The working class consists chiefly of manual and unskilled workers.The most obvious difference between them is in their accent. Middle-class people use slightly varying kinds of"received pronunciation"which is the kind of English spoken by BBC announcers and taught to overseas pupils. Typical working-class people speak in many different local accents which are generally felt to be rather ugly and uneducated. One of the biggest barriers of social equality in England is the two-class education system. To have been to a so-called "public school"immediately marks you out as one of the middle class. The middle classes tend to live a more formal life than working-class people, and are usually more cultured. Their midday meal is "lunch"and they have a rather formal evening meal called "dinner", whereas the working man's dinner, if his working hours permit, is at midday, and his smaller, late-evening meal is called supper.As we have said, however, the class system is much less rigid than it was, and for a long time it has been government policy to reduce class distinctions. Working-class students very commonly receive a university education and enter the professions, and working-class incomes have grown so much recently that the distinctions between the two classes are becoming less and less clear. However, regardless of one's social status, certain standards of politeness are expected of everybody, and a well-bred person is polite to everyone he meets, and treats a laborer with the same respect he gives an important businessman. Servility inspires both embarrassment and dislike. Even the word"sir", except in school and in certain occupations(e.g. commerce, the army, etc.) sounds too servile to be commonly used.The“upper class”in England today_______.
轨道电路信息接收模块可利用DMI选择锁定载频。
生产要素投入和产量水平之间的关系被称为（）。
组成药物中不含甘草的方剂是（ ）。
职代会的任务（）
男性，72岁。慢性咳嗽、咳痰30余年，近10年来气急进行性加重。不能到户外活动。近1周来发热，痰量增加，并略带黄色入院。体检：两肺呼吸音普遍降低，右侧明显，左下肺闻及干湿啰音。按最初经验性抗菌治疗效果不著，结合CT检查发现支气管扩张，更改抗菌治疗应选择（）
由于项目经理辞职，一个处于执行阶段的项目已暂停三个月时间。任命新项目经理后，新项目经理首先应该做什么？（）
从社会化发生的领域来看，可以把社会化的内容划分为（ ）。
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