按对象专业化设置生产单位,其优点是()。
A.管理工作简单
B.适应市场变化能力强
C.有利于实行专业化工艺管理
D.有利于提高工人生产技术水平
参考答案:B
At Sam’s birthday party he had many guests, who were ________friends of his.
A.mostly
B.usually
C.specially
D.nearly
哪些油品称为发动机燃料?