A. only when asbestos is used in building industry B. only when it is used in large quantities C. even if it is used in small quantities D. if they are used when wet rather than dry 参考答案:C 答案解析:细节题 根据第二段第二句至第三句可知:接受相对来说数量不大的石棉绒纤维也会直接引起癌症、石棉沉着病以及相关的疾病。C)项正合此意。B)项与此相冲突。D)项与题干结合起来的意思是:“如果石棉纤维浸湿了用