切削用量的变化影响加工质量、生产效率和刀具寿命。
参考答案:错
_________, I can see that those terrible events shaped me into the person I am today. [ ]
A. Being looking back
B. To be looking back
C. Having looked back
D. Looking back
6岁男童,10天前有咽扁桃体炎,2日前出现眼睑浮肿,以急性肾小球肾炎收入院,目前使用青霉素治疗,其目的是()
A.对症处理
B.减轻肾小球炎症反应
C.防止发生并发症
D.彻底清除感染灶
E.预防急性肾功能衰竭