关键工序确定原则是()。
A.设计输出文件规定的关键特性
B.工艺难度大,质量波动大,合格率低
C.生产周期长,原材料贵重,一旦出现质量问题损失大
D.以上都是
参考答案:D
— Sorry, the tickets have already been sold out.
— Really? Maybe I ________ a little earlier.[ ]
A. should come
B. should have come
C. could have come
D. must have come
甲亢病人术前准备最重要的是()
A.测定基础代谢率
B.心理护理
C.喉镜检查
D.抗甲状腺药物和碘剂的应用
E.钡餐和心电图检查