（）是指对产品质量的产生、形成和实现过程进行的抽象描述和理论概括。
A．质量特性
B．质量环
C．质量圈
D．全面质量管理
参考答案：B
下列叙述正确的是
A．黄铜属于合金，硬度比纯铜高
B．MgO、Al2O3是耐高温材料，工业上常用其电解冶炼对应的金属
C．二氧化硫具有漂白性，与氯水混合使用漂白效果更好
D．金属单质与盐溶液的反应都是置换反应
Following a precipitous delivery, examination of the client's vagina reveals a fourth-degree laceration. Which of the following would be contraindicated when caring for this client
A．Applying cold to limit edema during the first 12 to 24 hours.
B．Instructing the client on the use of sitz-baths if ordered.
C．Instructing the client about the importance of perineal (Kegel) exercises.
D．Instructing the client to use two or more peripads to cushion the area.
