配平□P4O+□Cl2——□POCl3+□P2Cl5。

普通水平电泳常用于分离（）

A.大分子蛋白质

B.小分子多肽

C.大分子染色体DNA

D.小片段染色体DNA

E.脂多糖

继承是面向对象开发技术中开发语言的特征之一，继承的主要目的是( )。

A．希望能够重复的使用别人写好的功能

B．提高对象之间的相互联系程度

C．快速的建立模型

D．减少系统开发的负责程度

The airline lost your baggage. The hotel laundry(洗衣房) ruined your favorite shirt. The taxi driver overcharged you. When you're abroad, sometimes things go wrong. Now you can do something about it! Use these tips when you want to express an effective complaint in English.

No matter how unfair the situation, it's best to phrase your complaint politely. In English, you'll sound more polite if you use indirect language. Here are some examples:

“I'm sorry to bother you...” Starting a complaint like this puts the listener who may have heard many complaints that day at ease. Use this phrase if the situation isn't that serious. For example, "I'm sorry to bother you, but I wanted a baked potato, not fries."

“Can you help me with this?” Everyone would much rather be asked to do something than told! So try phrasing your complaint as a request for help: "Can you help me with this? My shirt came back from the laundry without buttons."

“I'm afraid there may be a misunderstanding.” This is a polite way of saying, "Your information is wrong. Please fix it now." You'll most likely use this phrase if you made reservations(预定) for a flight, hotel or restaurant, and when you arrive, it's not what you expected. For example, "I'm afraid there may be a misunderstanding. I requested a non-smoking room."

“I understand it's not your fault...” Often when you make a complaint, you deal with a person who was not directly responsible for the problem. But the problem isn't your fault, either! This phrase is helpful when you need swift action. Tell the person you're dealing with you understand they're not at fault and then directly state the problem: "I understand it's not your fault, but the airline promised they would deliver my baggage yesterday."

“Excuse me, but I understood that...” Using this phrase lets the person know you're well-informed and are suspicious they might be trying to take advantage of you. Don't say, "Hey! You're trying to cheat me!" Instead, start indirectly by stating what you know to be true: "I understood that the taxi ride to the airport was only 25 dollars." Then give them an opportunity to do the right thing.

小题1:What’s the purpose of this passage?

A．To give an introduction of life abroad.

B．To give suggestions on how to learn English.

C．To offer advice on giving complaints in English.

D．To offer guides to those who travel around the world.小题2:According to the passage, if we meet an unfair situation, we’d better                 .

A．state our complaints politely

B．go for the police immediately

C．use indirect language to hurt people

D．fight against the one who is responsible小题3:Why should we start a complaint with polite phrases?

A．Because the situation is never serious.

B．Because the listener may not speak English.

C．Because it can help solve the problem more easily.

D．Because we should be always in good manners abroad.小题4:Several effective complaints in English are mentioned above EXCEPT        .

A．“Can you help me with this?”

B．“I understand it’s not your fault.”

C．“Hey! You’re trying to cheat me!”

D．“I’m afraid there may be a misunderstanding.”

关于公共定价，以下说法不正确的是（）

A.公共定价是指公共物品价格和收费标准的确定

B.公共定价是指政府定价

C.公共定价的对象仅包括国家机关和公共部门提供的公共物品

D.公共定价是政府保证公共物品提供和实施公共物品管理的一项重要职责

中华人民共和国计量法的适用范围有（）

A.必须在中华人民共和国境内

B.建立计量基准器具、计量标准器具

C.制造、修理计量器具

D.销售、使用计量器具

E.以上均正确