第15题: [单项选择]What is the final stage of quality control A. Visiting suppliers. B. During production. C. Chemical analysis. 参考答案:C 答案解析:质检最后阶段:The final stage is chemical analysis of our finished goods。故选C。
第16题: [单项选择]慢性肾盂肾炎反复发作的诱因为() A. 尿路畸形 B. 尿路梗阻 C. 机体免疫功能降低 D. 尿道口炎症 E. 以上均是 参考答案:E