有一杯冰水共存物,在物质分类中它应该属于①混合物②纯净物③单质④化合物⑤氧化物[ ]
A.①
B.②③
C.②④
D.②④⑤
答案:D
The internal communication linkages are the most important to the health of the project. Which of the following is one of the major diving forces for effective communication in a project
A) OptimizationB) DifferentiationC) SelectionD) Integration
礼貌待客的要求是:用语文明,尊重客人,提供规范化服务和注重()。
A、自己的身材
B、客人的职务
C、菜品的种类
D、仪容仪表