重链病是一种原发性恶性单克隆丙种球蛋白病。()
参考答案：对
Many little children suffer from kidney stone and the disease is reported _____ by the milk powder they eat. [ ]
A. to cause
B. to be caused
C. causing
D. being caused
下列哪项是肺癌较公认的常见发病因素（）
A.吸烟
B.食霉变食品
C.高脂饮食
D.遗传因素
E.放射线
