自然界腐蚀可分为（）大类。 A.2 B.3 C.4 D.5

已知m-3n=2m+n-15=1 ，则m=________ ，n=________ ．

地跨东西半球的大洲是[ ]

A．亚洲

B．欧洲

C．北美洲

D．南极洲

Informal conversation is an important part of any business relationship. Before you start a discussion, however, make sure you understand which topics are suitable and which are considered taboos in a particular culture. Latin Americans enjoy sharing information about their local history, art, and customs. They expect questions about their family and are sure to show pictures of their children. Yon may feel free to ask similar questions of your Latin American friends. The French think of conversation as an art form, and they enjoy the value of lively discussions as well as disagreements. For them, arguments can be interesting—and they can cover pretty much or any topic—as long as they occur in a respectful and intelligent manner.

In the United States, business people like to discuss a wide range of topics, including opinions about work, family, hobbies, and politics. In Japan, China, and Korea, however, people are much more private. They do not share much about their thoughts, feelings, or emotions because they feel that doing so might take away from the harmonious business relationship they’re trying to build. Middle Easterners are also private about their personal lives and family matters. It is considered rude, for example, to ask a businessman from Saudi Arabia about his wife or children.

As general rule, it’s best not to talk about politics or religion with your business friends. This can get you into trouble, even in the United States, where people hold different views. In addition, discussing one’s salary is usually considered unsuitable. Sports is typically a friendly subject in most parts of the world, although be careful not to criticize a national sport. Instead, be friendly and praise your host’s team.

The author considers politics and religion（）

A. cheerful topics

B. taboos

C. rude topics

D. topics that can never be talked about

下列关于建设工程项目管理说法不正确的是（）

A.建设工程项目管理是指通过一定的组织形式，用系统工程的观点、理论和方法对建设工程项目策划决策、设计施工、竣工验收等系统运动过程进行计划、组织、指挥、协调和控制的过程。

B.建设工程项目管理是以建设工程项目目标控制为核心的管理活动。

C.建设工程项目管理的目标控制是指质量控制、进度控制和风险控制。