问题 单项选择题

下列叙述中,是淀粉、纤维素和糖原的共同特征的是()

A.都是细胞内储存能量的主要物质

B.都含有C、H、O、N四种元素

C.基本组成单位都是五碳糖

D.基本组成单位都是六碳糖

答案

参考答案:D

解析:

纤维素是组成植物细胞细胞壁的成分,不是储能物质,故A错;糖类的元素是C、H、O,故B错;组成多糖的基本单位是葡萄糖,葡萄糖属于六碳糖,故C错,D正确。

考点:本题主要考查糖类的种类和作用,意在考查考生能理解所学知识的要点,把握知识间的内在联系,形成知识的网络结构的能力。

阅读理解

Love, success, happiness, family and freedom——how important are these values to you? Here is one interview which explores the fundamental questions in life.

Question: Could you introduce yourself first?

Answer: 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 your great memories?

A: My parents used to take us to hunt birds, climb trees, and play in the fields. For me it was like a holiday because we were going to have fun all day long. Those are my great memories.

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 childhood working, with responsibilities beyond my age. However, it taught me to deal with problems all alone. I learnt to be independent.

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

A: If I could change something in my life, I’d change it so that my childhood could have taken place in another area. I would have loved to live with my family in freedom. Who cares whether we have much 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 parents 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 through the phone, but I hate using it. It filters(过滤)out your emotion and leaves your voice only. My deepest feelings should be passed through sight, hearing and touch.

小题1:In Misbah’s childhood,         .

A.he was free from worry

B.he liked living in the countryside

C.he was fond of getting close to nature

D.he often spent holidays with his family小题2:What did Misbah desire most in his childhood?

A.A colorful life.

B.A beautiful house.

C.Peace and freedom.

D.Money for his family.小题3:How would Misbah prefer to communicate with his parents?

A.By chatting on the Internet.

B.By calling them sometimes.

C.By paying weekly visits.

D.By writing them letters.小题4: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 hardest experience in the war?

单项选择题