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（6分）食品保鮮的措施有添加防腐劑、充填氣體、放置干燥劑和脫氧劑等。
（1）丙酸鈉是一種常用的防腐劑，其化學(xué)式為C₃H₅O₂Na。它由     種元素組成，碳元素和氧元素的質(zhì)量比為    。
（2）生石灰是常用的干燥劑。請(qǐng)用化學(xué)方程式表示其作干燥劑的原因      。
（3）鐵粉也可用作保鮮劑，它利用了鐵生銹的原理，所以又稱“雙吸劑”。這里的“雙吸”是吸收空氣中的         。有一袋鐵粉使用了一段時(shí)間，表面已經(jīng)生銹，經(jīng)驗(yàn)證它還可以繼續(xù)使用，其驗(yàn)證方法是加入過量的稀鹽酸，寫出有關(guān)反應(yīng)的化學(xué)方程式       、        。

（18分）“從生活走進(jìn)化學(xué)，從化學(xué)走向社會(huì)”。請(qǐng)你用化學(xué)知識(shí)回答以下生活中的問題：
（1）2011年3月15日央視曝光的“雙匯瘦肉精”事件,是繼“三鹿奶粉”事件后震驚國人又一大事件。瘦肉精的成分是鹽酸克倫特羅，化學(xué)式為C₁₂H₁₉CI₃N₂O，瘦肉精是一種        （填“有機(jī)”或“無機(jī)”）物，它含有          種元素，它的一個(gè)分子中含有_________個(gè)原子；含氮元素的質(zhì)量分?jǐn)?shù)為             (結(jié)果保留到0.1%)。
（2）人被蚊蟲叮咬后皮膚會(huì)紅腫痛癢，這是由于蚊蟲在被叮咬的皮膚內(nèi)注入了少量的酸性物質(zhì)所致。在被咬的皮膚上涂少許下列生活用品中的      或      (填序號(hào))，痛癢便會(huì)消失。

A．香油

B．肥皂水

C．純堿水

D．糖水

（3）做饅頭發(fā)酵面團(tuán)時(shí)，會(huì)產(chǎn)生乳酸等有機(jī)酸，揉面團(tuán)時(shí)需加入適量的純堿或小蘇打，讓它們相互作用產(chǎn)生      氣體，使蒸出的饅頭疏松多孔；若加入的純堿或小蘇打過多，可向面團(tuán)或蒸鍋中滴加少許酸性物質(zhì)，如           ，否則蒸出的饅頭會(huì)變澀，顏色發(fā)黃。
（4）工廠常用稀鹽酸清洗鐵制品表面的鐵銹。該過程的化學(xué)方程式為                。

維生素C（C₆H₈O₆）主要存在于蔬菜、水果中。近年來科學(xué)家發(fā)現(xiàn)，維生素C除具有人們所熟知的功效外，還具有防癌作用。但是蔬菜經(jīng)過高溫烹調(diào)，Vc將被破壞殆盡，所以一些綠色蔬菜經(jīng)過油鍋快炒即可。
⑴ 以上材料說明維生素C熱穩(wěn)定性       （填“好”或“差”）；
⑵ 維生素C常被添加入果汁飲料中作為營養(yǎng)增強(qiáng)劑，pH＜7時(shí)，維C比較穩(wěn)定，所以在涼拌黃瓜時(shí)候可以加入      （從“食醋”和“面堿”中選擇）作為調(diào)料能保持黃瓜營養(yǎng)；
⑶ 維生素C中碳、氧、氫三種元素的質(zhì)量比是­­­­­­­­­­­­­­       。

Hi! My name is Hunt. Here is a picture of my class. Joan is short and is wearing a yellow dress. She is good at maths. David is tall and has black hair. He is good at playing basketball. He is on the school team. Mike is big. He has small eyes. He is funny. He can play football. Lily has long hair, she can speak Japanese.
Helen is a black girl. She has short hair. She likes swimming. She is on the swimming team. I like music. Can you find me? I'm the boy with glasses. Becky is new here. She comes from Hong Kong. She has black hair and black eyes. She speaks English well. And she is very good at computer.
(   )1.The colour of Joan's dress is ________.
A. blue               B. black            C. red               D. yellow
(   )2. ________ has long hair.
A. Joan               B. Lily             C. Helen            D. Becky
(   )3.Which is right?
A .David is short.                         B. Mike has long hair.
C. Helen is a white girl.                  D. Becky is good at computer.
(   )4.Hunt likes  ________.
A. basketball        B .football        C .music            D. computer
(   )5.Helen is on the  ________team
A. music            B. football        C. bashetball        D. swimming

One day, in an English class, the students are having their lessons. Their teacher, a young woman is very happy. She sings some nice songs with them and then she goes to the blackboard and writes “SMILES” on it. “This is the longest（最長）word in English,” she says to the class.
A girl stands up and says, “It has only six letters. How can it be the longest word in English?”
The teacher smiles and says, “Oh, look! There is a mile（英里）between the first letter and the last one.”
(     )6. One day, the students are having _________.
A. a good time   B. a big meal   C. a long meeting  D. an English lesson
(     )7. The young woman sings some nice songs with __________.
A. her children   B. her students  C. the teacher     D. a girl
(     )8. What does the teacher write on the blackboard?
A. A letter.      B. A word.      C. A song.       D. Her name.
(     )9. A girl _________ what the teacher says.
A. asks        B. believes(相信)  C. doesn’t       D. doesn’t believe
(     )10. Is the word “SMILES” the longest in English?
A. Yes.         B. No.          C. Certainly.     D. Sure.

There is a new park near Andy’s home. It’s fine today. Andy and his family are in the park now. On their left, there is a café. On their right, there is a big lake. There are many flowers and trees around the lake. There’s a small hill behind the lake. Near the lake, there are two signs. One says, “Don’t swim in the lake!” The other says, “No fishing!” But you can go boating on the lake. There is a beautiful garden in the middle of the park. There are green grass and beautiful flowers in it. There are some small shops between the lake and the garden. The park is so nice. Andy and his family like it very much.
(   )11. The park near Andy’s home is ____________.      .
A. new and beautiful    B. old and beautiful   C. clean and new   D. old and clean
(   )12. Is there a café in the park? ---_____________.      
A. Yes, there isn’t.      B. No, there isn’t.      C. Yes, there is.    D. No, there is.
(  )13. People can________ on the lake.
A. swim                 B. fish                C. boat              D. play
(   )14. The shops in the park are not _____________.      .
A. small                  B. big                 C. good            D. pretty
(   )15. Do Andy and his family like the park?  --__________.    
A. Yes, they don’t.                      B. No, they do.      
C. Yes, very much.                    D. No, they don’t.

A. 根據(jù)句意或中英文提示，寫出單詞的正確形式，每空一詞。(8 分)
1. He is my ________ (雙胞胎) sister, Kate.
2. Lucy is going to the ____________（博物館）this winter holiday.
3. Kitty is small and she loves to  ____________（跳舞）.
4.There are two ___________ (圖書館) in my school.
5. Tom is a ________ (有禮貌)boy. He always says "hello" to his teachers.
6.Would you like to be a m__________ of the Reading Club?—Of course..
7. He enjoys c_____ with his friends on the Internet .
8.Listen to me and a_____________ my questions.
B. 用所給詞的適當(dāng)形式填空。(7分)
9. Sunday is the ____________(one) day of a week.
10.. June 1^st  is ____________ Day. (child)
11. Yao Ming is a very good basketball ____________. (play)
12. It’s time ____________(have) lunch.
13.Thank you for ____________(call) me.
14.May I ____________(borrow) your ruler?
15. I spend about an hour a day ____________(clean) the room.

完成句子。（共10個(gè)空格；每空1分，計(jì)15分）
1. “我爸每天下班后步行回家。
My father always _________   _________ after work every day.
2. 我表弟出生在英國。
My cousin Li Hai _________   _________ in England.
3. 請(qǐng)別在花園里爬樹。
________   ________ the tree in the garden, please.
4..我們的足球隊(duì)是世界上最好的隊(duì)。
Our football team is ________  _______ in the world.
5.Deniel喜歡做飛機(jī)模型
Denniel likes _________   ___________ planes
6．湯姆喜歡玩電腦游戲，所以他戴眼鏡。
Tom likes playing  computer games, so he________  _______.    .
7．他不知道怎樣娛樂。
He doesn’t  know ______  _______ have  __________.

你結(jié)識(shí)了一位外國網(wǎng)友,下面是她的相關(guān)信息,請(qǐng)根據(jù)她給你所發(fā)的照片及個(gè)人資料,向你的同學(xué)們介紹她。70個(gè)單詞左右。

	Name	Annie
	Age	13
	From	New York
	Love	Play computer games, singing, listening to music.
	Like	Wear beautiful clothes
	Dislike	exercise, Maths

 
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Simon, Kitty says she        a comic book in your home yesterday.

A．leaves

B．left

C．forgets

D．forgot