具有通行元气功能的是A．脾B．胃C．小肠D．大肠E．三焦

(三)

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.

Why are people from Asia more private in their conversation with others

A．They don’t want to talk with others much.

B．They don’t want to have their good relationship with others harmed by informal conversation.

C．They are afraid to argue with their colleagues.

D．They want to keep their feelings to themselves.

接地扁铁与铁塔的焊接接触面必须在（）以上。

A.5cm

B.10cm

C.15cm

D.20cm

某学生用0.2000mol·L^-1的标准NaOH溶液滴定未知浓度的盐酸，其操作为如下几步：

① 用蒸馏水洗涤碱式滴定管，并立即注入NaOH溶液至“0”刻度线以上

② 固定好滴定管并使滴定管尖嘴充满液体

③ 调节液面至“0”或“0”刻度线稍下，并记下读数

④ 移取20.00mL待测液注入洁净的锥形瓶中，并加入3滴酚酞溶液

⑤ 用标准液滴定至终点，记下滴定管液面读数。

请回答：

（1）以上步骤有错误的是（填编号）______________，该错误操作会导致测定结果(填“偏大”、“偏小”或“无影响”)__________________

（2）步骤⑤中，在记下滴定管液面读数时，滴定管尖嘴有气泡，将导致测定结果(填“偏大”、“偏小”或“无影响”)___________________

（3）判断滴定终点的现象是：锥形瓶中溶液从_________色变为_________色，且半分钟不变色。

（4）下图是某次滴定时的滴定管中的液面，其读数为____________mL

（5）根据下列数据：请计算待测盐酸溶液的浓度：_______________mol/L

直接顶分为四类，即不稳定、中等稳定、稳定、坚硬四种类型

常用密封件有：（）密封圈、Y型密封圈、V型密封圈等。