Drug resistance arises due to the improper use of antibiotics in chemotherapy of drug-susceptible TB patients.
耐药性产生的起因是对药物敏感的结核病患者进行化疗时，不恰当地使用了抗菌素。
Methods: the drug sensitivity or resistance of 40 NSCLC samples to 9 chemotherapeutic drugs and combined chemotherapy were detected by MTT colorimetric assay, and compared the results.
方法：应用MTT显色分析法测定40例非小细胞肺癌实体瘤标本对9种化疗药物及其组成的联合化疗方案的敏感性或耐药性，并比较结果。
Chemotherapy is the main treatment of lung cancer, but it often failed because of drug resistance.
化疗是肺癌的主要治疗方法，但是由于肺癌对很多化疗药物产生耐受常常导致治疗失败。
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