VII.板书设计: Listening class Task One: (new words and expressions), allow, enough, get her ears pierced ,be allowed to do sth. Task Two: (ew words and expressions), disagree, cut his hairs top wearing sth, work on Task Three: (new words and expressions), miss, fail, test ,explain ,happened VIII.教学反思: 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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(10分)植物具有向重力生长的特性,下列是研究根向重力生长机理的两个实验。
实验一:将空白琼脂和含EDTA的琼脂做成帽状,分别套在甲、乙两组玉米胚根的根冠外(示意图如下)。提示:EDTA的作用是去除与其临接部位的 Ca2+

将胚根水平放置培养一定时间后,观察到甲组胚根向重力(下)生长,乙组胚根水平生长。根据上述实验结果,得出实验结论:                               
  实验二:水平放置的胚根弯曲向下生长,与根冠近地侧的Ca2+浓度明显高于远地侧有关。研究表明,根总是朝着Ca 2+浓度高的方向弯曲生长。为验证这一结论,有人设计了下列实验方案。请根据提供的实验材料和用具,写出第二步及以后的实验步骤和实验结果,并回答问题。
(1)实验材料和用具:胚根等长的萌发玉米种子,空白琼脂帽,含EDTA的琼脂帽,上面部分含Ca2+的琼脂帽(水平方向),培养皿等。
(2)实验步骤:
  第一步:取若干个培养皿,在每个培养皿中放置适量的萌发玉米种子,按实验一中乙组的方法处理胚根一定时间后,移去根冠外的琼脂帽。然后将培养皿平均分成两组,编号为 A组、B 组。 
  第二步:                                                            
  第三步:                                                            
(3)实验结果:                                                         
(4)科学家进一步证实,根冠中生长素的分布受Ca2+浓度影响,当胚根水平放置时,重力诱导Ca2+向根冠下侧移动,导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系:                                  

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为探究植物细胞膜的透性,某同学以红甜菜根(液泡中含有花青素)进行下列实验:
A.将不同切片放在不同温度的蒸馏水中处理1分钟后取出。
B.再分别放在清水中浸泡1小时而获得不同的切片浸出液。
C.测量这些溶液的花青素吸光度,得结果如下图。

请回答以下问题:
(1)上述实验操作步骤的叙述存在着一个明显的不足,没有遵循实验设计的    原则。请你对上述实验中的不准确的操作重新进行叙述:            
(2)由上图中的曲线你可以得出的结论是                    
(3)已知物质A能促进细胞膜上载体的活性。有人认为:经过不同温度的处理是影响了细胞膜上运载花青素的载体的活性。请你借助上述材料设计实验证明该观点是否正确。
材料用具:略。
实验步骤:
                                                                   
                                                                  
                                                                   
(2)预测结果及结论:
                                                                   
                                                                   

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阅读理解

  The holiday’s upon us.After months of study, you have some time to yourself.So, why not read a book?Well, some people will say, ‘Why trouble with books?We have the Internet and other media(媒体)that offer a lot more colorful programs.Books are history!”

  But don’t be fooled.There’s still a lot to be said for reading-and reading as widely as possible.

  One clear reason is that a well-chosen book is a wonderful collection of words and expressions, so long as you have a good dictionary, of course.Believe me, it’s far easier to get new English words and expressions from a book or article than it is from the TV or the Internet.

  But an even more important point is that books give you something that modern media simply can not:The webpage(网页)is always full of pictures and the text is often designed(设计)to make it as easy to read as possible.

  Though “easy”may be welcome, unluckily it’s of little use for any long-time development of reading skills and the general language level.For that, there’s still no substitute(替代品)for a book.

  But perhaps the best single reason is that simply choosing what you read and doing it by yourself means that it’s something you do by and for yourself.You can choose what you want to read.It’s hard work, but while you are reading, you’ll find that what once seemed like a duty is now a pleasure.

(1)

Compared with the Internet, a well-chosen book can help us ________.

[  ]

A.

spend our holiday as quickly as possible

B.

develop our speaking skills in a short time

C.

get new words and expressions more easily

D.

make our life a lot more colorful than ever

(2)

The last paragraph mainly tells us that ________.

[  ]

A.

we should buy books by ourselves

B.

it’s easy to choose books

C.

to read books must be our duty

D.

reading can bring us pleasure

(3)

The passage mentions ________ reason(s)why we should read books.

[  ]

A.

one

B.

two

C.

three

D.

four

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