问题 实验题

(6分)下图是绿色植物在生物圈二氧化碳和氧气平衡中的作用 ,分析回答:

(1)生物圈中氧气的主要来源是植物的_______;

(2)大气中二氧化碳主要来源是,从动植物来说是在_____________过程中产生二氧化碳,

(3)大气中二氧化碳的消耗:绿色植物通过               消耗二氧化碳。

(4)植物进行光合作用的原料是                           ,产物是                        ,条件是                   

答案

1)光合作用 2)呼吸  3)光合作用  4)二氧化碳和水、有机物(或淀粉)和氧气、 光

题目分析:(1)绿色植物的光合作用即通过叶绿体,利用光能,把二氧化碳和水转化成储存能量的有机物,并且释放出氧气的过程。

(2)大气中二氧化碳的来源有:动植物的呼吸将有机物分解释放二氧化碳,微生物分解动植物的尸体腐烂后,会产生二氧化碳,化学燃料的燃烧后产生二氧化碳气体等,从而将生物体中的二氧化碳返回大气中。

(3)绿色植物通过光合作用释放氧气,不断消耗大气中的二氧化碳,维持了生物圈中碳-氧的相对平衡。

(4)绿色植物通过叶绿体,利用光能,把二氧化碳和水转化成储存能量的有机物,并且释放出氧气的过程,叫做光合作用,所以光合作用的原料是二氧化碳和水,产物是有机物和氧气,条件是光,场所是叶绿体。

点评:此题为基础知识题,解答此题的关键需熟记绿色植物的光合作用释放氧气,消耗大气中的二氧化碳,维持生物圈中的碳-氧平衡。

阅读理解

 I was 13 years old.  My family had moved to Southern California from North Florida a year before.  I hit adolescence with a vengeance.  I was angry and rebellious, with little regard for anything my parents had to say, particularly if it had to do with me. Like so many teenagers, I struggled to escape from anything that didn't agree with my picture of the world.  A "brilliant without need of guidance" kid, I rejected any overt offering of love.  In fact, I got angry at the mention of the word love.

One night, after a particularly difficult day, I _____________, shut the door and got into bed.  As I lay down in the privacy of my bed, my hands slipped under my pillow.  There was an envelope.  I pulled it out and on the envelope it said, "To read when you're alone."

Since I was alone, no one would know whether I read it or not, so I opened it.  It said "Mike, I know life is hard right now, I know you are frustrated and I know we don't do everything right.  I also know that I love you completely and nothing you do or say will ever change that.  I am here for you if you ever need to talk, and if you don't, that's okay.  Just know that no matter where you go or what you do in your life, I will always love you and be proud that you are my son.  I'm here for you and I love you - that will never change.  Love, Mom. 

That was the first of several "To read when you're alone" letters.  They were never mentioned until I was an adult.

Today I travel the world helping people.  I was in Sarasota, Florida, teaching a seminar when, at the end of the day, a lady came up to me and shared the difficulty she was having with her son.  We walked out to the beach, and I told her of my mom's undying love and about the "To read when you're alone" letters.  Several weeks later, I got a card that said she had written her first letter and left it for her son. 

That night as I went to bed, I put my hands under my pillow and remembered the relief I felt every time I got a letter.  In the midst of my turbulent teen years, the letters were the calm assurance that I could be loved in spite of me, not because of me.  Just before I fell asleep I thanked God that my mom knew what I, an angry teenager, needed.  Today when theseas of life get stormy, I know that just under my pillow there is that calm assurance that love - consistent, abiding, unconditional love - changes lives.

1.What’s the best title of the passage?  

2.Which sentence in the passage is the closest in meaning to the following one?

I reached out my hands for the letter under the pillow that night when I went to bed ,and I always felt relief with the letter under my pillow.

3.Please fill in the blank in the passage with proper words or phrases to complete the sentence.(within ten words) 

4.What do you learn after reading the passage?(within 30 words)

5.Translate the underlined sentence into Chinese.

填空题