YOU may like chewing gum after meals to stop your breath smelling bad; or your mother might use a special neutralizer to protect her permed hair . But have you thought about the chemical principles be 题目和参考答案——青夏教育精英家教网—

题目内容

YOU may like chewing gum (口香糖) after meals to stop your breath smelling bad; or your mother might use a special neutralizer (调理剂) to protect her permed hair (烫发). But have you thought about the chemical principles behind such everyday actions?

On March 2, the Senior 3 students from the IB (International Baccalaureate, 国际文凭) classes at Beijing Huijia Private School presented their discoveries, all in fluent English. This kind of seminar is held every year to show the achievements of the IB chemistry experiment lessons offered by the school. IB is a qualification based on a common curriculum (课程) for students aged 16-18 in any country and is recognized by universities everywhere.

"Once I saw an advertisement for xylitol (木糖醇) gum," recalled Zhang Xinju. "Suddenly an idea came to my mind: are there any chemical reactions when the xylitol is working on our teeth?"

Zhang and his partner Bu Xuan visited several hospitals to try and find out. "Doctors know that xylitol can protect teeth, but few could explain how the chemical reactions happen," said the 17-year-old boy.

Presenting the results of their research in English to an audience of Chinese and foreign judges was never a problem for the students.

"Textbooks for IB students are in English, and our teachers speak in English," explained Wei Duan and Han Yu, whose research topic was "The Acid-Base Reaction (酸碱反应) in the process of Hair-Perming".

"In Senior 1 we often referred to Chinese textbooks, but we found we could understand and express it all in English by the second year."

Lu Jiang, the school's IB chemistry teacher and China's only IB vice-examiner, is proud that her students can apply scientific theories they learn in class to daily life.

"You might have learned these facts from you kindergarten teachers, but few think about the theories behind them," Lu said. "This kind of practice is intended to develop the scientific thinking they will need in their future studies."

1.IB is recognized by____________.

A.Beijing Huijia Private School

B.univercities in China

C.schools in Engkish-speaking countries

D.universities in any country

2.which statement is true?____________

A.Doctors don’t know that xylitol can protect teeth

B.Doctors can explain how the chemical reactions happen

C.Few could explain how the chemical reactions happen.

D.The foreign doctors can explain how the chemical reactions happen

3.Textbooks for IB students are in___________

A.Chinese B.English

C.English and Chinese D.Japanese

4.From the passage,we know_______

A.the students are creative

B.the students are poor in Chinese

C.the students don’t like chewing gum

D.The students are hard-working

5.From the passage,we can infer _________________________

A.we only need to work hard in our study

B.we must learn English well

C.we should intend to develop the scientific thinking in our studies

D.we should have more time to play

练习册系列答案

新锐图书假期园地暑假作业中原农民出版社系列答案

相关题目

He could see the tall chimneys of the factory ______.

A. from distance B. in distance

C. in the distance D. to a distance

A few days ago, I was sitting in a Thai restaurant enjoying a meal when I got on a phone call from a friend I hadn’t spoken to in a long time. In my enthusiasm and excitement, I talked quite louder than usual voice and in Spanish, my mother tongue.

A few minutes into the call, an old lady sitting at the table beside mine got up, seemingly offended, and asked the restaurant staff to relocate (重新安排) a table as far away as possible from this man who seemed to be impolite.

I sank in my seat out of embarrassment. I ended the call soon afterwards and felt the urge to apologize. Before getting up, I looked around to see where she was and she was at the table farthest away from me. I noticed that the lady was alone and staring out the window. I found a tinge (气息) of sadness or anxiety and perhaps a desire for aloneness and peace. But I had obviously destroyed it minutes earlier.

Right then I abandoned my plan for a conventional apologetic gesture. Seeing those funny smile cards in my wallet, I took one out and wrote some words to express my apology. On signing my restaurant bill, I asked a waiter to secretly charge the lady’s meal to me and hand her the smile card instead of her bill.

Did she take it the wrong way, I wondered? Did she get confused? Did she refuse the anonymous (匿名的) offer? And so on. I just waited and felt nervous to learn the outcome. To my pleasant surprise, things turned out the best possible way.

The waiter approached me in a joy, telling me, “In the many times she had dined here before, I had never seen the old lady smile as she did when receiving the smile card and the $0 bill. She thanked me even though I explained that someone else did the job.”

1.The old lady changed her seat mainly because of __________.

A. her private phone call

B. the author’s loud voice

C. the views out of the window

D. the restaurant staff’s mistake

2.What can we infer from Paragraph 3?

A. The author didn’t stop talking though he felt embarrassed.

B. The author went up to the old lady and apologized to her.

C. The old lady just moved to the farthest table to see outside.

D. The lady didn’t have a nice mood and liked to stay alone.

3.Feeling sorry, the author offered the old lady the following EXCEPT __________.

A. an apologetic gesture

B. a smile card

C. a free meal

D. some written words to apologize

4.Which of the following is the best title of this passage?

A. A Misunderstanding Caused by Different Cultures

B. An Unpleasant Experience in Thailand

C. A Smile Card for a Sincere Apology

D. An Old Lady Who Never Smiles

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

What Teenagers Can Do to Earn More Respect?

As teenagers continue to grow and develop into young adults, the transition (过渡) into adulthood has begun. With so many physical and emotional changes going on, certain manners are often forgotten and other adult traits are not yet accepted as a way of life. ___1.__ By doing the following things, you will earn more respect.

Contribute to the household

At the very least, clean up after yourself. As a teenager, you are old enough to clean up after yourself. When you make a mess, clean it up. ____2.___ All chore (杂活) that you do help to reduce the load of the person who did them before. Now that you’re old enough and capable, why shouldn’t you contribute to the household? ____3.___

Be responsible

___4.___ Whether they are basic things, like brushing your teeth or doing your homework, or more involved chores that contribute to the household, simply fulfill your responsibilities on time. When adults know that they can rely on you, their trust and respect for you will increase.

Solve more of your own problem without asking for help

Instead of taking the easy approach and asking for help, make an effort to solve your problems on your own first. The “easy way” is only easy for you, but it is an extra task for the person from whom you are seeking help. Seek help only after you have made an honest effort to solve your own problems. __5.____ When you become a good problem solver, you increase your value to the community.

A. Everyone has certain responsibilities.

B. By being aware of these manners and traits, you can manage them sooner.

C. When speaking to a group, speak loud enough.

D. The people doing the chores before will greatly appreciate the help.

E. Depending on the problem, 15 minutes of effort is usually a good guideline.

F. It will make your life more pleasant.

G. This includes, but is not limited to, your dishes and your room.

语法填空

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式(不多于3个单词)。

Keeping a diary in English is one of the effective ways to improve our English writing ability.

Compared with other forms of writing, it is shorter and takes1. (little) time. It can help us to develop the habit of thinking in English. If we persist in this practice, gradually we’ll learn how2. （express）ourselves in English. In keeping a diary in English, we certainly run up against many3. (difficult). In the first place, it often happens that we have trouble in4. (find) appropriate words and phrases to give expression to our mind. Secondly, there5. (be) many idiomatic ways of saying things in Chinese. And it is extremely hard for us to put them into English 6. (proper).

As far as I am7. (concern), my suggestion is8. we should always have a notebook and a Chinese-English dictionary within easy reach. Whenever something beats us, we can first put it down in our notebook and then consult our dictionary. We can also ask our English teacher9. help, if necessary. In short, I believe that it is of great use to keep a diary in English for10. development of our writing skills.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

Easy Ways to Boost Your Confidence

Imagine being able to overcome any obstacle that might come your way at work or in relationships. Then try to picture yourself not having to ask for advice or someone’s approval every step of the way. 1. If you are low on confidence, read on because here are four easy ways to boost your confidence. Once you master them, everything in your life will change for the better.

Boost your self-image. If failure is getting you down, just remember that there is always a solution. 2. The best way to boost your self-image after a setback（挫折）is to write down all your accomplishments and star qualities. Make a list and put it ion your computer desktop or near where you spend most of your time. You can also make a list of all the things you should be grateful for.

3. You know your talents and strengths first. Then set your goals to match these. Reject those that are just beyoud your skills, abilities, qualifications or experience. This is where you can realistically assess your weaknesses and build on your strengths.

Get on the positive thoughts track. Nothing can be done without hope and confidence. 4. Negative thinking may be useful when imagining failure situations, threats, and obstacles. But once you are trapped in negative thoughts, your brain ignores everything else and you only think of failure. The best solution is to build on positive thoughts.

Know being confident is an ongoing process. 5. Keep playing to the best of your ability and your confidence will always be there to support you.

A. Set realistic goals.

B. Stop playing different roles.

C. It isn’t a goal that you reach and then stop.

D. Why not keep comparing yourself with others ?

E. This is what self-confident people do every day.

F. So why are they positive thoughts and not negative ones ?

G. You may have to try again so you should boost your self-image immediately.

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

In the jewelry market, the diamond takes a big part.

Chinese women, 1. (particular) the married ones, helped drive global diamond jewelry sales up 2. 3 percent to a record high of $79 billion in the past year. Demand from China grew 14 percent, the 3. (fast) rate globally.

The demand mainly came from married women, who accounted for two 4. (three) of purchases and sales value. Engaged（订婚的）women accounted for around 20 percent of purchases and 5. (contribute) to just under a quarter of sales value in China, while single women accounted for 14 percent of purchases and made up 11 percent of sales value.

6. is wedding-purchase for many women in China that is driving the demand. Many single women are 7. (buy) diamonds for themselves in China too. 8. China remains the largest contributor to demand in the global diamond jewelry market, its increase rate started to slow. China has been the biggest 9. (grow) engine for the diamonds business for the past five to 10 years. The rate is slowing down now, but it’s still a big increase. This year the demand of China 10. (be) just under 10 percent.

书面表达

近年来, 随着私家车的增加, 城市交通越来越拥挤。在中、小学生上学或放学时, 校门口以及学校附近拥挤问题更加严重。这给学生、教师、家长和其他市民带来许多不便。尤其值得注意的是, 学校附近的交通堵塞也存在不可忽略的隐患。为此, 这引起了不少民众的担忧。你作为一名在校学生, 署名张小明, 根据以下要点写一封英语信, 向英语报投稿。

1. 为什么要写这封英语信。

2. 你们学校门口及附近交通拥挤的原因。

3. 提出二至三条建议。

注意：词数100左右。

Dear Editor,

_______________________________________________________________________________

Yours,

Zhang Xiaoming

Tech-Camp

No.6 Devon Road, Kowloon Tong, Hong Kong a technology day camp for students 12-17

About Tech-Camp

Tech-Camp is a day camp with a focus on computers and electronics technology. We offer 2-week summer programmes for students of 12 to 17 years of age. We have a computer lab with the latest and fastest equipment, an electronics lab, and a video production studio. Our staff are special, too. They are experts in computers and electronics, of course, but they are also people who care about children and enjoy working with them.

The benefits of Tech-Camp

In all of our programmes, we show students how to work in teams and how to solve problems by themselves. We encourage them to think creatively.

What students will do at Tech-Camp

Each day Tech-camp is filled with useful, interesting and challenging activities. For example, in the Computer Programme, students learn the basic computer programming, and how to use the Internet. In the Tech-Camp Programme, they make radio-controlled model cars and produce their own short videos.

Programme Session 1 Session 2 Session 3

Computer Programme 15 June-26 June 15 June-26 June 15 June-26 June

High-tech Programme 29 June-10 July 27 July-7 August 15 June-26 June

Fee: HK $2,000 per student

(10% discount available for groups of 10 or more students.)

For more information about Tech-Camp, please contact Director of Summer Programmes, Ms Julia Brown, by phone, fax or e-mail.

Telephone: 26548898

Fax: 26948850

E-mail: juliab@techcamp.com.hk

1.What would you probably like to ask about if you phone Ms Julia Brown after reading the brochure?

A. The activities the students will have.

B. The fee each attendant should pay.

C. The e-mail address of Tech-Camp.

D. The deadline for application.

2.From the brochure we can infer that _______.

A. the Camp offers students accommodation during their two-week stay at the Camp

B. high school teachers are in charge of the Tech-Camp all the time

C. students can learn about the hi-tech through lectures given by the experts

D. students can learn how to think and solve problems creatively and learn teamwork

3.According to the passage, how much will they pay if a group of 20 students enter for Tech-Camp?

A. HK $36,000. B. HK $35,000.

C. HK $3,600. D. HK $40,000.

试题分类