问答题 请介绍这幅《三金山水》的艺术特点？

单项选择题 以下哪个物品可以作为合同的标的物（    ）？   A、枪支 B、海洛因  C、紫砂壶 D、火烧圆明园

单项选择题 When is it appropriate to take a mobile phone call during a business dinner? A. When you excuse yourself from the table and talk in another part of the restaurant.B. When the call concerns those who you are having dinner with (i.e., the call is from the boss).C. Only when you make the call very brief and apologize to your dinner mates.D. Never.