数据库模型提供了两个映射，它们的作用是______。A．控制数据的冗余度 B．实现数

“生物圈2号”的失败给人类带来了深刻的经验教训，使我们认识到[ ]

A．与自然和谐共处的重要性

B．自然界给人类提供的生命支持服务是无价之宝

C．随着人类科技的进步，人类最终还是可以完全模拟出自然生态系统

D．人类没有能力去完全模拟出自然生态系统

（8分）下图中的实验装置可以用于实验室制取乙炔。请填空：

（1）图中A管的作用是                                                   ，

制取乙炔的化学反应方程式为                                        。

（2）乙炔通入酸性KMnO₄溶液中，发生     反应，可以观察到                

现象，若通入溴水中，发生       反应。

（3）乙炔燃烧的化学方程式为            ，燃烧时的现象为                ，

为了安全，点燃乙炔前应该先         。

货市场和期货市场

根据汉语提示完成句子，每空一词。

1．我没有同伴练习英语。

I don't have a partner______ _____ English with.

2．你会编对话吗? 

Can you_______ ______dialogues?

3．提高语文最好的方法就是多读书。

The best way______ ______your Chinese is to read books more.

4．如果不理解新单词，你可以在词典中查找。

If you don't understand new words, you can______ them______ in a dictionary.

5.棉花摸起来很软。

Cottons______ very______.

6．时间流逝，友谊长存。

Time_______ _______,and______ may be kept.

7．作为年轻人，在老师的帮助下尽全力去应对学业中的每一次挑战是我们的责任。

As young adults, it is our duty to______ our_____ to ______ ______ each challenge in our

education______ ______ ______ our teachers.

8．布鲁斯太太对学生非常亲切，以至于学生们把她当做自己的母亲。

Mrs. Bruce was_______  kind to her students______ they______ her_____ their mother.

B

Love ,suaeess, happincss, family and frecdom——how important are these valucs to you? Here is one interview which explores the fundamental questions in life.

Question : Could you introduce yourselr first?

Amswer:My name is Misbah,27 years old. I was born in a war-torn area. Right now I’m a web designer.

Q :What are yout grcat memorise?

A:My parents xxxx to take xx to hunt birdo.and play in the fields. For me it was like a holidax xxx we were going to have fun all day long. Those aer my great mernorics.

Q:Does your childhood mean a lot to you?

A:Yes. As life was very hard, I used to work to help bring money in for the family. I spent my chidhood working. I learnt to be independent.

Q;What changes would you like to make in your life?

A:If I could change comething in my life. I’d change it so that my childhood could have taken place in another xxx. I would have loved to live with my family in freedom. Who cares whether we have mach money, or whether we have a beautiful house? It doesn’t matter as long as I can live with my family and we are safe.

Q:How do you get along with your parents?

A:My parcnts supported me until I came of age. I want to give back what I’ve got. That’s our way. But I am working in another city. My only contact with my parents now is tbrough the phone, but I xxx using it. It filters(过滤)out your cmotion and leaves your voice only. My deepest feelings should be passed through sight, henring and touch.

60.In Misbuh’s childhood, _________.

A.he was free from worry

B.he liked living in the countryside

C.je was fond of getting close to nature

D.he often spent holidays with his farnily

61.What did Mishap desire most in his childood？

A.A colorful life.

B.A beaunful house

C.Peace and freedom

D.Money for his family

62.How would Misbah prcfer to communicatc with his parents?

A.By chatting on the Internet.

B.By calling them sometimes

C.By paying weekly visits

D.By writing them letters

63.If there were only one question left ,what would it most probably be?

A.What was your childhood dream?

B.What is your biggest achievement?

C.What is your parents view of you?

D.What was your handest expenrience in the war?