问题
单项选择题
近年来，随着汽车数量的增加。我国多个城市的大气污染都由煤烟型转向碳氧化物型污染，居民的健康检查结果也都发生与此相应的健康效应变化，其中最为突出的是（）
A.皮炎发生率增加
B.上呼吸道刺激作用增强
C.对肺组织的刺激作用增强
D.致敏作用增强
E.溶血作用增强
答案
参考答案：C
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近年来，随着汽车数量的增加。我国多个城市的大气污染都由煤烟型转向碳氧化物型污染，居民的健康检查结果也都发生与此相应的健康效应变化，其中最为突出的是（）
A.皮炎发生率增加
B.上呼吸道刺激作用增强
C.对肺组织的刺激作用增强
D.致敏作用增强
E.溶血作用增强
参考答案：C
完形填空。(10小题，每小题1分，共10分) More than three thousand languages are spoken in the world today . Many of these languages are spoken _36 small groups of people . On the 37 ,hand , over two hundred languages are spoken by one million or more people . Chinese is the language spoken by the ___38 ___number of people in the world . But English is most 39 spoken in the world . English is spoken by more than four hundred million people 40 their first language . It is 41 by most people in the U.S.A. , Great Britain , Canada , Australia and New Zealand . And it is 42 used very widely in many other countries of the world . Look at the back of your watch . You may see the English words “Made 43 China” , or “Japan” , even “Germany” . English is the first language in 44 of these . Why are English words 45 on it ? That is because in the modern world English is widely used for business between different countries .
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