click 此处表示“点击 文件夹. Ⅱ.单项选择 A)从各小题所给的四个选项中选出最佳答案 查看更多

 

题目列表(包括答案和解析)

如图甲表示某生物膜结构,图中A、B、C、D、E、F表示某些物质,a、b、c、d表示物质跨膜运输方式。图乙和图丙表示物质运输曲线,请据图回答:


(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.                                

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书面表达,编一个上午英语课上课时的对话

  T表示教师  S表示学生

  M表示班长  

T: Class begins.(上课)

M: ________

T: ________

S: ________

T: ________

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给下列动词(短语)找出合适的搭配

  print  connect  write  use   download

  check  switch   on   click   give   make

1.______ information on the internet

2.______ emails to her foreign friends

3.______ plans for traveling

4.______ the computer

5.______ your spelling of the words

6.______ the laptop for my lessons

7.______ a new document

8.______ the printer to the computer

9.______“print” with the mouse

10.Don't forget to ______ a document a name.

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(9分)许多实验研究生长素(IAA)对植物生长的影响模式,如用玉米胚芽鞘作为实验材料:
实验1:将切除的胚芽鞘尖端放置于琼脂块上(图1),移去尖端后,将琼脂切成体积相等的若干个方块,将方块放在除去尖端的胚芽鞘上,实验进行一定时间后,每个胚芽鞘弯曲的角度以图2的方法测量,并计算平均值。每次放在等面积、等体积琼脂块上的胚芽鞘尖端数量不同,这样重复上述过程。

 实验2:用含有不同浓度IAA的琼脂块代替胚芽鞘尖端进一步实验。上述两个实验的结果如图3和图4所示。

(1)绘图表示,如何将琼脂块放置于胚芽鞘上,才能得到图3的结果?
(2)解释实验2的结果:IAA从0μmol/L~1.3μmol/L过程中    ;1.3μmol/L~1.8μmol/L过程中         
(3)①比较实验1和实验2的结果有什么不同?             
   ②为什么会出现这种不同?                     。
(4)从本实验可知促进胚芽鞘生长的最适生长素浓度约为_______                    
图4中曲线上b点对应生长素浓度时胚芽鞘弯曲角度为17度,把琼脂块去掉后,胚芽鞘最终会如何生长?________                                                       

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Shop F.Y. – Elisabeth Online Shopping!
Do you want to buy some good things? Do you want to buy them at low prices? Do you want to buy them at home? Do you want to buy them right now?
F. Y. can help you!
There are hundreds of good things for you to choose. Just do it! The thing you need is a computer. Here is the way to buy things online.
1. Choose a kind of thing you want to buy and click on the describing words. For example, if you want to buy a sweater, you can click on the word – clothes.
2. Choose the color and size. If you want a small black sweater, you can click on the words- small and black.
3. You can see a list of small black sweaters with the price. You just click on the sweater you like.
4. Enter your name, address, telephone number and ID card number.
OK! The shop assistant will send your sweater in one day. Isn’t it easy? Enjoy your shopping here!
【小题1】This ad is for_____________.
A.a jobB.a shopC.sweatersD.computers
【小题2】If you buy something ________, the first thing you need is a computer.
A.onlineB.at schoolC.on TVD.in a shop
【小题3】After you find sweaters online, you want a small black one and you can click
on “__________”.
A.clothesB.smallC.blackD.small and black
【小题4】What don’t you need to enter into the computer?
A.Your name.B.Your address.
C.Your ID card number.D.Your age.
【小题5】What does the underlined word “click” mean?
A.查找B.点击C.选择  D.勾出

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