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（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>>
句型转换（本题共5小题；每小题1分，共5分）
1. We often see Daniel practice speaking English in the English corner. (改成被动语态)
Daniel is often practice speaking English in the English corner.
2. My grandpa offered me good advice. (改为感叹句)
advice my grandpa offered me!
3. I didn't get to the cinema in time because I lost my way. (保持句意基本不变)
I didn't get to the cinema in time the loss of my way.
4. That girl with a smile is clever and polite. (对划线部分提问)
is the girl with a smile ?
5. He’s already been late for school so many times. (改为一般疑问句)
he been late for school so many times ?
查看习题详情和答案>>
1. We often see Daniel practice speaking English in the English corner. (改成被动语态)
Daniel is often practice speaking English in the English corner.
2. My grandpa offered me good advice. (改为感叹句)
advice my grandpa offered me!
3. I didn’t get to the cinema in time because I lost my way. (保持句意基本不变)
I didn’t get to the cinema in time the loss of my way.
4. That girl with a smile is clever and polite.(对划线部分提问)
is the girl with a smile ?
5. He’s already been late for school so many times. (改为一般疑问句)
he been late for school so many times ?
句型转换（本题共5小题；每小题1分，共5分）
1. We often see Daniel practice speaking English in the English corner. (改成被动语态)
Daniel is often practice speaking English in the English corner.
2. My grandpa offered me good advice. (改为感叹句)
advice my grandpa offered me!
3. I didn't get to the cinema in time because I lost my way. (保持句意基本不变)
I didn't get to the cinema in time the loss of my way.
4. That girl with a smile is clever and polite. (对划线部分提问)
is the girl with a smile ?
5. He’s already been late for school so many times. (改为一般疑问句)
he been late for school so many times ?
查看习题详情和答案>>
Small children often laugh at(
嘲笑) a lame(瘸子) or a blind person, or at someone who isn't dressed as well as they are. But as they grow up, they learn not to hurt people's feelings by laughing at their problems. They learn to laugh at other things. Most important, they learn to laugh at themselves.Suppose (
假设) you're playing a game. You make a mistake and lose. Do you become angry? Or can you laugh at yourself and hope to do better next time?Suppose you're at a special dinner. You spill (
溢出) some food. Why keep worrying? Why not laugh it off and enjoy yourself anyway? If you can, it's a good sign you have grown up.(1)This passage is about______.
[ ]
A
．why laughter is good for your bodyB
．what you should laugh atC
．when babies learn to laughD
．where you may laugh(2)The writer says small children laugh at people who______.
[ ]
|
A ．have problems |
B ．spill food |
|
C ．dress well |
D ．play games |
(3)The writer shows how laughter could help you not to_______.
[ ]
|
A ．make a mistake |
B ．lose a game |
|
C ．become angry |
D ．try again |
(4)Next the writer shows how laughter could keep you from______.
[ ]
|
A ．spilling food |
B ．worrying |
|
C ．enjoying yourself |
D ．growing up |
(5)If you find a new skill (
技能) hard to learn, you should______.[ ]
A
．laugh at your own slownessB
．keep trying until you learn itC
．give up and never try againD
．both A and B 查看习题详情和答案>>