公共关系协会的基本任务是什么？

质量为m₁的小环A套在光滑的直角杆上，MN部分竖直，小环A与物块B用细绳连接，如图所示。物块B的质量为m₂，小环A在M点由静止释放，MN间距为h，ON水平，OM与竖直夹角为，则有                          （   ）

A．小环A运动到N点时，小环A的速度为零

B．小环A运动到N点时，物块B的速度为零

C．小环A运动到N点时，小环A的速度为

D．小环A从M点运动到N点的过程中，绳的拉力对A做的功为

Did you ever think someone was scary (恐怖的)because they looked different or ate strange food? Well, they might think the same about you! One of the things we all need to do is to celebrate variety．We shouldn’t think badly of people from other cultures because they behave differently from us.

Sometimes we treat people from other countries unfairly, because one person from that culture did something bad．Well, has your class ever been punished just because a few kids were causing trouble? Has your whole family ever been blamed for something your little sister did? It doesn’t seem fair, does it? It’s just equally unfair to blame a whole culture for what two or three people have done.

So here are some things that you can do to help yourself understand other cultures:

①Find common ground!

Just remember that even though some people look different on the outside, that doesn’t change how they are on the inside．They still have the exact same feelings!

②________________

Because someone from another culture has been mean to you, you decide to avoid everyone from that culture．Well think about it．Why are you blaming them for something they didn’t have anything to do with? Put yourself in their shoes．How would you feel? Putting yourself inside someone else’s head can be a very powerful way to understand WHY they are acting the way they are.

③Try to make friends with people from other cultures!

You could ask them about their culture, or what it is like in their country, if they can remember, or if they have ever lived there．Try foods from their culture, or ask them about words in their language．You might be surprised at how interesting other cultures can be! You can join great discussion groups, participate in projects, and have lots of fun doing new things.

④Be aware that you’ve judged other people

If you know what you have done, it helps to make things better．Pay attention to what you think about other people．It helps.

小题1:What is mainly discussed in this passage?  

A．Why there are differences between people

B．What to do to understand other cultures

C．How people feel when they meet people from other cultures

D．The differences between people from different cultures小题2:Which of the following can be put into the blank behind ②?

A．Avoid everyone from that culture!

B．Put all responsibilities on others!

C．Consider oneself first!

D．Don’t blame all because of one!小题3:The underlined word “celebrate” most probably means “_______”.

A．feel proud of

B．express ideas of

C．praise and enjoy

D．pay attention to小题4:The following can be the better way to treat foreigners except_______.

A．join their discussion groups

B．try foods from their culture

C．avoid meeting them

D．find common ground

实验发现，摘除小狗的胰腺后，其尿液容易招引蚂蚁，这是因为（　　）

A．食物中的糖未消化就排出体外

B．胰岛素分泌增多

C．尿中有较多的葡萄糖

D．小狗因摘除胰腺而诱发肾炎

砌筑砂浆拉伸强度试验中，一组试件中有效数据不少于（）时，取有效数据的平均值作为试验结果.

A.5个

B.6个

C.8个

D.9个

2003年6月1日是某甲(14周岁)和某乙 (16周岁)的生日，两人上年—起去某网吧上网，因欠网吧钱遭受老板奚落，心怀恨意，遂在下年买了两桶汽油浇在网吧门口，刚点燃便害怕了，遂喊了一声“救火呀”便逃跑了，后来因为群众发现及时，将火扑灭了。

根据上述案例，请回答以下问题：

冯某对市房管局向孙某核发房屋所有权证的行为不服，以自己是房屋所有权人为由请求法院判决撤销某市房管局的发证行为。冯某向法院提交了房屋所有权证，孙某向法院提交了该房屋买卖合同，市房管局向法院提交了孙某的房屋产权登记申请、契税完税证等证据。下列哪一说法是正确的？（）

A.法院在收到被告提交的证据后应当出具收据，加盖法院印章

B.孙某可以在一审庭审结束前向法院提交房屋买卖合同

C.冯某向法院提交其房屋所有权证是承担举证责任的表现

D.房屋所有权证，房屋买卖合同、房屋产权登记申请、契税完税证均系书证