网址:http://m.1010jiajiao.com/timu_id_369938[举报]
(1)若图甲是癌细胞的细胞膜,则膜上含量较正常细胞减少的物质是[ ] 。
(2)若图甲是线粒体膜,b和c过程运输的气体分别是 。b、c运输方式符合图 所表示的物质运输曲线。
(3)若图甲表示人体红细胞膜,则表示Na+、K+运输的分别是图中 。Na+、K+的运输方式符合图 所示曲线。
(4)已知红细胞吸收葡萄糖是协助扩散,而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖,请设计实验加以确定。
①实验步骤:
第一步:取甲、乙两组生理状况相同的小肠上皮细胞,放入适宜浓度的含有葡萄糖的培养液中。
第二步:甲组细胞给予正常的呼吸条件, 。
第三步: 。
②预测实验结果并分析:
a.若甲、乙两组细胞对葡萄糖的吸收速率基本相同,则 。
b. 。 查看习题详情和答案>>
完形填空
Time is very important in our lives. But it never had any importance in my life until I 1 a watch from my father that made me responsible(有责任). It 2 me the importance of time in my life.
I got this gift on a grey-sky day. I had to go to the 3 at 9:00 a.m. to pick up(接)my uncle Ali and take him to my father’s house. However, I forgot it 4 I was playing with my friends. Later on that day, around 11:00 a.m., I 5 my uncle, but I was late for him. He had got out of the plane and 6 a taxi to my father’s house.
I 7 my father’s house at 2:00 p.m. at the same day . My father looked at me angrily. I said “hi” to him and my 8 uncle. My father asked me to sit 9 him and handed me this watch which was a gift from 10 . It weighed 8 oz(盎司)and all of it was made of silver(银). Then he said, “Essa, did you have fun 11 your friends today? What you did was not very nice and you should be sorry for your 12 .” I felt sorry and told my father that I wouldn’t do it again. Then he said, “This watch will be a reminder(提醒物) for you. I hope today you have learned something 13 .”
I learned a lesson from my father: to respect(尊重) time and 14 be late. The watch is important to me, not because of its 15 , but because of the lesson that I learned from it.
| 【小题1】 |
|
| 【小题2】 |
|
| 【小题3】 |
|
| 【小题4】 |
|
| 【小题5】 |
|
| 【小题6】 |
|
| 【小题7】 |
|
| 【小题8】 |
|
| 【小题9】 |
|
| 【小题10】 |
|
| 【小题11】 |
|
| 【小题12】 |
|
| 【小题13】 |
|
| 【小题14】 |
|
| 【小题15】 |
|
I lost my sight when I was four years old by falling off a box and landing on my head. Now I am thirty-two. I can vaguely(模糊地) 1 the brightness of sunshine and what color red is. It would be wonderful to see things again, 2 a disaster can do strange things to people. It happened to me the other day that I might not have come to love 3 as I do if I hadn’t been blind. I believe in life now. I am not sure that I would believe in it so 4 . I don’t mean that I would prefer to go without my eyes. I 5 mean that the loss of 6 made me enjoy more of 7 I have now.
Life asks us to keep making 8 to reality. If a person is able to get ready for anything changeable his world will 9 more meaningful. I became blind, but I was 10 . My parents and my teachers saw 11 in me-a potential(潜力) to live, you might call it-which I didn’t see, and they make me fight it out with blindness.
The hardest 12 I had to learn was to believe in myself. That was what I had to do at least. If I hadn’t been able to do that, I would become a chair rocker for the 13 of my life. When I say I believe in myself I am not talking about simply the kind of self-confidence that helps me down an unfamiliar staircase 14 . That is part of it. But I mean something bigger than that: A belief that I could deal with anything alone; that somewhere in the 15 there is a special place where I can make myself fit.
1. A. imagine B. find C. remember D. guess
2. A. but B. though C. so D. because
3. A. myself B. life C. eyes D. blindness
4. A. that B. therefore C. happily D. deeply
5. A. seldom B. just C. hardly D. always
6. A. them B. it C. blindness D. light
7. A. that B. what C. which D. where
8. A. moments B. encouragements C. improvements D. changes
9. A. become B. change C. look D. end
10. A. brave B. lucky C. sad D. wise
11. A. something B. everything C. nothing D. anything
12. A. problem B. experience C. difficulty D. lesson
13. A. rest B. whole C. need D. last
14. A. lonely B. alone C. self D. person
15. A. company B. group C. society (社会) D. family
查看习题详情和答案>>