T: There are four seasons in a year, but they are all different. Now, Let’s see how they are different. Group 1, please write down the sentences describing spring. Group 2, please write and tell us what summer is like. Group 3, please work for fall. Group 4, please describe how winter is different from others. Ss: OK. (学生开始分组活动.老师在旁边观看,指点和纠正一些必要的错误.) (活动结果板书预计如下.) spring summer fall winter (1)It’s warm. (1)It’s hot. (1)It’s cool. (1)It’s cold. (2)It’s from December to February. (2)It’s from March to May. (2)It’s from June to August. (2)It’s from September to November. (3)It’s a good season for hiking. (3)It’s a good season for swimming. (3)It’s a good season for climbing mountains. (3)It’s a good season for making snowmen. (4)It’s often sunny. (4)It sometimes rains. (4)It is often windy. (4)It sometimes snows. (5)Spring is green. (5)Summer is bright. (5)Fall is yellow. (5)Winter is white. (6)I can fly kites. (6)I can wear sunglasses and shorts. (6) I can eat apples. (6)I can skate. (7)When it rains,it is wet. (7)It’s dry. (7)We can go traveling. (7)We can wear warm clothes. (8)We can wear light clothes. (8)We can have summer holidays. (8)We can begin our new term. (8)We can have winter holidays. (9)Trees come back to life. (9)The highest temperature can be 37℃ sometimes. (9) We can eat different kinds of fruit. (9)The lowest temperature can be -17℃ sometimes. (10)The wind blows softly. (10)Sometimes it rains suddenly. (10)Leaves begin to fall from the trees. (10)Farmers are not busy. Step 2 Presentation 第二步 呈现 查看更多

 

题目列表(包括答案和解析)

根据汉语提示完成句子。

1. 我将尽我最到的努力学好英语。

I’ll_______ __________ _________ _________ learn English well.

2. 老师通常把我们分成四人一组。

The teacher usually________ ______ _______ teams of four students.

3. 十年来我们学校发生了巨大的变化。

Great changes _______ ______ _______ in our school since ten years ago.

4. 请提供给我们一些食品。

Please _______ ________ _________ some food.

5. 患难朋友才是真朋友。

A friend_______ _______ is a friend indeed.

6. 我们希望你不要轻视这种工作。

We hope you won’t ________ ______ _______ this kind of work.

7. 咱们轮流打扫房间吧。

Let’s ______ ________ _____ clean the room.

8. 我认为团队精神最重要。

I think that the _________ _____________ is the________ ________.

9. 我想更多地了解电脑知识。

I want to _______ ______ ________ the knowledge of computers.

10. 电脑可以用来学习英语。

Computers can ________ ________ _________ learn English.

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根据汉语提示完成句子。
1. 我将尽我最到的努力学好英语。
I’ll _____ _____ _____ _____ learn English well.
2. 老师通常把我们分成四人一组。
The teacher usually_____ _____ _____ teams of four students.
3. 十年来我们学校发生了巨大的变化。
Great changes _____ _____ _____ in our school since ten years ago.
4. 请提供给我们一些食品。
Please _____ _____ _____ some food.
5. 患难朋友才是真朋友。
A friend_____ _____ is a friend indeed.
6. 我们希望你不要轻视这种工作。
We hope you won’t _____ _____ _____ this kind of work.
7. 咱们轮流打扫房间吧。
Let’s _____ _____ _____ clean the room.
8. 我认为团队精神最重要。
I think that the _____ _____ is the_____ _____.
9. 我想更多地了解电脑知识。
I want to _____ _____ _____ the knowledge of computers.
10. 电脑可以用来学习英语。
Computers can _____ _____ _____ learn English.

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下面的四组字母中不含有相同的元音音素的是(    )

A. b, t, c              B. s, l, n          C. q, u, w          D. a, k, f

 

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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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下面的四组字母中不含有相同的元音音素的是

[  ]
A.

b, t, c

B.

s, l, n

C.

q, u, w

D.

a, k, f

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