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一、癌症 ,是人类生存的大敌 ,在细胞分化的过程中 ,有的细胞由于受到致癌因子的作用形成癌细胞 ,从而生长出恶性肿瘤 .1.在下列几种射线中属于物理致癌因子的射线有 ( ) ,能够用以做“放疗”的射线有( ) .A.红外线 B.可见光C.紫外线 D.X射线E.γ射线
First, cancer is the enemy of human survival. In the process of cell differentiation, some cells become cancerous cells due to the effects of carcinogenic factors, which lead to the growth of malignant tumors. 1. Among the following types of radiation are physical carcinogenic factors. Rays have (), can be used to do “radiotherapy” rays have () .A. infrared B. visible light C. ultraviolet rays DX rays E. gamma rays