品牌管理
参考答案：
品牌的管理贯穿于品牌的塑造、应用、维护和提升的全部过程中，包括了品牌的定位、策略、形象设计、传播和市场监测等。
He had to work hard to earn money______ his children were at college. [ ]
A. as
B. after
C. while
D. before
测定铬的容器有油污时，应使用什么来洗涤？
