精英家教網 > 高中英語 > 題目詳情

A food additive (添加劑) is any substance that is added to food. Many people are put off by the idea of “chemicals in food.” The truth is that all food is made up of chemicals. Natural substances like milk, as well as man-made ones like drinks on sale in the market, can be described by chemical formulas. Some chemical substances are indeed harmful, but a person who refused to consume any chemicals would find nothing to eat.

The things we eat can be divided into natural and man-made substances. Some people feel that only natural foods are healthy and that all man-made ingredients are to be avoided. But many natural chemicals, found in plants and animals, are harmful when eaten, and some laboratory-made substances increase the nutritional value of food. Other chemicals have natural and man-made forms that are exactly alike: vitamin C is vitamin C, whether it comes from a test tube or from an orange. Like “chemical”, “man-made” doesn’t necessarily mean “not fit to eat”.

Food additives are used for many reasons. We add sugar and salt and other things to foods we prepare at home to make them taste better. Food producers have developed a range of additives that stabilize（使穩(wěn)定）, thicken, harden, keep wet, keep firm, or improve the appearance of their products. Additives can make food more convenient or nutritious, give it a longer shelf life, and make it more attractive to the consumer, thus increasing the sales and profits of the producers.

Food additives are presently the centre of a storm of serious argument. Food producers have been known to use additives that have not been proved safe; some substances in common use have been proved unsafe and have been taken off the market. Many people feel there’s a risk of eating food to which anything has been added. But food additives are now regulated by the FDA of the federal government, and new additives will go through strict testing before they can be placed on the market. For most people, the chances of developing serious side effects (副作用) from the long-term use of presently approved (批準) food additives are very small.

1.From the passage we can learn that .

A. natural foods are much safer than man-made ones

B. it is right to refuse chemicals in food

C. food additives are harmful to our health

D. all foods have chemical substances

2.Which of the following is TRUE according to the passage?

A. Food additives can improve the quality of foods in many ways.

B. To ensure food safety, the FDA will stop food additives.

C. Foods free of additives can keep a much longer shelf life.

D. Foods with more additives have higher nutritional value.

3.We can infer from the regulation to the food additives by the FDA that .

A. new additives will be approved more easily than before

B. food with common-used additives will be taken off the market

C. food additives will be used in a safer and more scientific way

D. food producers won’t be allowed to use new food additives

4.According to the writer, the food additive is .

A. worrying B. acceptable

C. poisonous D. avoidable

練習冊系列答案
相關習題

科目：高中英語 來源：2015-2016學年河北定興三中高一3月考英語試卷（解析版） 題型：短文改錯

短文改錯

文中共有10處語言錯誤，每句中最多有兩處。每處錯誤僅涉及一個單詞的增加、刪除或修改。

增加：在缺詞處加一個漏字符號（∧），并在其下面寫出該加的詞。

刪除：把多余的詞用斜線（\）劃掉。

修改：在錯的詞下畫一橫線，并在該詞下面寫出修改后的詞。

注意：1. 每處錯誤及其修改均僅限一詞；

There will be a speech on our school playground this Saturday afternoon, which theme is “To civilize schoolyard is my responsibility”. All the teachers and students required to attend. In the activity, the first two winner in each grade will give such valuable advice as follows: we should not litter somewhere in order to keep our campus clean; we should love flowers, grass and trees such that everyone can enjoy the greenness; we should behave well instead of run after one another, quarreling and fighting noisy; we should care for the others so that our school will be full with love. We believe your school will become more and more beautiful and peaceful.

查看答案和解析>>

科目：高中英語 來源：2015-2016學年寧夏銀川二中高一3月月考英語試卷（解析版） 題型：語法填空

語法填空

閱讀以下材料，在空白處填入適當的內容（不多于3個單詞）或括號內單詞的正確形式

Henry,__ 1._____ American businessman, 2. (rescue) by a British ship at sea. 3. took him to London 4. he found himself without money, friends or the hope of a good job. ___5.___(hunger) and alone, he walked in the streets of the city when he was invited into a large house 6. (unexpected).The two wealthy brothers, Roderick and Oliver 7. (make) a secret bet. Roderick believed that a man could not survive in the city for a month 8. a million pound bank note, 9. Oliver believed he could. The play followed Henry’s adventures 10. (find) who would win the bet.

查看答案和解析>>

科目：高中英語 來源：2015-2016學年湖南衡陽一中高一下第一次月考英語試卷（解析版） 題型：短文改錯

短文改錯

假定英語課上老師要求同桌之間交換修改作文, 請你修改你同桌寫的以下作文。文中共有10處語言錯誤, 每句中最多有兩處。每處錯誤僅涉及一個單詞的增加、刪除或修改。

增加: 在缺詞處加一個漏字符號 (∧) , 并在其下面寫出該加的詞。

刪除: 把多余的詞用斜線 ( \ )畫掉。

修改: 在錯的詞下畫一橫線, 并在該詞下面寫出修改后的詞。

注意: 1. 每處錯誤及其修改均僅限一詞;

2. 只允許修改10處, 多者 (從第11處起) 不計分。

I, together with my two friends, were eating dinner at a Chinese restaurant, located in the center of New York. I noticed the young woman eating with two kids. We stop by and I asked the kids if he believed in Santa. The elder boy, whom was about seven years old, pointed his younger sister and said, “She does, but I don’t. ”I told them Santa was real and as we were paying for our dinner, I paid for theirs, either. I didn’t know that whether the woman was alone, but I grow up with my mother supporting us four kids alone. I still feel good thinking I may have helped on some small ways.

查看答案和解析>>

科目：高中英語 來源：2015-2016學年湖南衡陽一中高一下第一次月考英語試卷（解析版） 題型：閱讀理解

Lost iPhone

Unexpectedly, I lost my white iPhone 5s in Midtown on Friday night. It had a blue green cover on it. There are many pictures of my son in it, and I’m heartbroken. Please return, no questions asked. Reward. Reply to: -2652255359@craigslist. org

Do you need a babysitter that you can trust?

My name is Tina. I am a responsible babysitter that you can trust. If you are looking for someone dependable and affordable I am that person! I HAVE MORE THAN 30 YEARS OF EXPERIENCE (including disabled children)! I am a retired Home Health Aid and absolutely love children. I work with my sister Iris who has also more than 20 years’ experience as a teacher’s assistant. WE LOOK FORWARD TO MEETINC YOU! Available 24 hours and flexible with fees! I am fully bilingual—Spanish/English. Please email me or call 712-867-7688.

I BABYSIT ONLY AT MY HOME

I accept children from all ages. Fee starts from $100～$150 a week depending on the hours. I am very flexible and my fee can change. Feel free to contact me via email or on my cell phone 566-67-1873 and we can work something out.

Part-time Chinese Babysitter Wanted

Part-time Chinese speaking babysitter needed to assist with one-year-old twins and to perform some light housework as needed. Assistance needed Fridays and occasional weekends. Please provide your salary expectation. College students are welcome to apply.

Reply to: comm-encbq-2652113885@craigslist. org

1.If you want to send your kids to the babysitter’s home, you can find one in _______ .

A. Ad 1 B. Ad 2 C. Ad 3 D. Ad 4

2.What do we know about Tina?

A. She can speak two languages.

B. She lives alone now.

C. She takes care of children over 3.

D. She used to be a teacher’s assistant.

3.An applicant accepted by Ad 4 will have to _______ .

A. be able to speak two languages

B. be a college graduate

C. work every weekend

D. look after two children

4.Who posted the lost and found information?

A. A mother. B. A kind woman.

C. A heartbroken girl. D. A parent.

查看答案和解析>>

科目：高中英語 來源：2015-2016年內蒙古杭錦后旗奮斗中學高二下月考一英語卷（解析版） 題型：短文改錯

短文改錯

假如英語課上老師要求同學們交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，要求你在錯誤的地方增加、刪除或修改某個單詞。

增加：在缺詞處加一個漏字符號( ＾), 并在此符號下面寫出該加的詞。

刪除：把多余的詞用斜線（ ＼）劃掉。

修改： 在錯的詞下劃一橫線, 并在該詞下面寫出修改后的詞。

注意:：1、每處錯誤及其修改均僅限一詞；

2、只允許修改十處, 多者(從第11處起) 不計分。

Last summer vacation, I went back to my hometown to visit my grandparent. They had several cows in their yard. One day, one of them were ill, but it didn’t want take any medicine. An animal doctor came and gave it an injection. After a while, and it seemed to be better, so I decided to feed it anything. I fed it carrots, which were cutting into small pieces. I also fed it milk powder with pills in them, just as a doctor told me. Although looking after an ill cow was a tired job, I felt a sense of achievement as it begins to recover.

查看答案和解析>>

科目：高中英語 來源：2015-2016年內蒙古杭錦后旗奮斗中學高二下月考一英語卷（解析版） 題型：閱讀理解

Crazy Festivals

Mike the Headless Chicken Festival

In 1945, farmer Lloyd Olsen attempted to cut off the head of Mike, a chicken, so his wife could cook it up for dinner. However, the bird didn’t die and lived another year and a half, making regular trips to the fair, where people paid a quarter to see the amazing headless chicken bird.

Today, the spirit of Mike the headless Chicken is celebrated with a two-day May festival in Fruita, Colorado, which includes live music, a golf tournament（錦標賽）, and lots of tasty chicken.

Roswell UFO Festival

In the summer of 1947, a flying saucer(碟狀物) crashed on a large farm outside the town of Roswell, New Mexico. The government says it didn’t come from outer space, but many top UFO researchers believe it did.

Knowing a good thing when it crashes in their backyard, the citizens of Roswell celebrate the even every July with a three-day festival that features a costume contest, a parade and other activities. Be careful, though ---- that odd little person next to you could be from another planet.

World’s Largest Rattlesnake Roundup

The rattlesnake, a poisonous American snake, severs an important function in nature by keeping small pets under control, but when their numbers grow too large, they can cause serious problems for farmers. That’s why every March the residents of Sweetwater, Texas, host a three-day festival to connect with the town’s annual rattlesnake hunt.

Visitors can learn about rattlesnakes, take a bus tour of their natural habitat, participate in a rattlesnake eating contest and so on.

BugFest

Every September, the North Carolina Museum of Natural Sciences in Raleigh sponsors (倡議) a daylong festival that focuses on something most people try to avoid: insects.

Visitors can hold bugs that are not native, cheer on racing insects and learn about beekeeping. But the highlight for many is Cafe Insecta, where bugs are the main ingredient (食材) in a variety of tasty dishes.

1. Llord Olsen cut off the chicken’s head because ____

A. his family wanted to eat it.

B. he wanted to sell its meat at the fair.

C. his family wanted to celebrate a headless chicken festival.

D. he wanted to make money by showing a headless chicken.

2.The underlined word “odd” could be replaced by ____.

A. irregular B. unusual C. accessible D. scary

3.What’s the purpose of the World’s Largest Rattlesnake Roundup? ____.

A. To increase the local tourism.

B. To protect rattlesnakes’ habitats.

C. To control the population of rattlesnakes.

D. To introduce the importance of rattlesnakes.

4. Which of the following is the earliest festival of the year? ____.

A. Mike the Headless Chicken Festival. B. Roswell UFO Festival.

C. World’s Largest Rattlesnake Roundup D. BugFest

查看答案和解析>>

科目：高中英語 來源：2015-2016學年北京大學附中河南分校高一3月考英語試卷（解析版） 題型：閱讀理解

When it comes to friends, I desire those who will share my happiness, who possess wings of their own and who will fly with me. I seek friends whose qualities illuminate（照亮）me and train me up for love. It is for these people that I reserve the glowing hours, too good not to share.

When I was in the eighth grade, I had a friend. We were shy and “too serious” about our studies when it was becoming fashionable with our classmates to learn acceptable social behaviors. We said little at school, but she would come to my house and we would sit down with pencils and paper, and one of us would say: “Let’s start with a train whistle today.” We would sit quietly together and write separate poems or stories that grew out of a train whistle. Then we would read them aloud. At the end of that school year, we, too, were changing into social creatures and the stories and poems stopped.

When I lived for a time in London, I had a friend, He was in despair and I was in despair. But our friendship was based on the idea in each of us that we would be sorry later if we did not explore this great city because we had felt bad at the time. We met every Sunday for five weeks and found many excellent things. We walked until our despairs disappeared and then we parted. We gave London to each other.

For almost four years I have had remarkable friend whose imagination illuminates mine. We write long letters in which we often discover our strangest selves. Each of us appears, sometimes in a funny way, in the other’s dreams. She and I agree that, at certain times, we seem to be parts of the same mind. In my most interesting moments, I often think: “Yes, I must tell….”We have never met.

It is such comforting companions I wish to keep. One bright hour with their kind is worth more to me than the lifetime services of a psychologist（心理學家），who will only fill up the healing（愈合的）silence necessary to those darkest moments in which I would rather be my own best friend.

1. In the eighth grade, what the author did before developing proper social behavior was to _____.

A. become serious about her study

B. go to her friend’s house regularly

C. learn from her classmates at school

D. share poems and stories with her friend

2. In Paragraph 3, “We gave London to each other” probably means ______.

A. our exploration of London was a memorable gift to both of us

B. we were unwilling to tear ourselves away from London

C. our unpleasant feeling about London disappeared

D. we parted with each other in London

3.According to Paragraph 4, the author and her friend _______.

A. call each other regularly

B. have similar personalities

C. enjoy writing to each other

D. dream of meeting each other

4.What is the best title for the passage?

A. Unforgettable Experiences

B. Remarkable Imagination

C. Lifelong Friendship

D. Noble Companions

查看答案和解析>>

科目：高中英語 來源：2015-2016學年湖南益陽箴言中學高一下學期3月考英語試卷（解析版） 題型：完形填空

Several years ago, some people told me I was really stupid and laughed at me. I _________ it. All my life, I achieved grades that were only fairly _________, and over time I felt I couldn’t catch up with my classmates. I thought I would never achieve great achievements (成就). I felt a sense of shame and a sense of _________.

I didn’t get accepted into the course I wanted, _________ I was most upset. My dad told me, “You have two _________. Do a pre-university course or take up an easier course.” I thought for a long time and _________ made the decision that changed my whole life. I flew to another city, enrolled (注冊學習) in a pre-university course and _________ very successfully.

Of course, it wasn’t that _________. While I was doing my course, it was difficult. I _________ and I wouldn’t give up. I decided that I was going to _________ to everyone that I could make it. The greatest force that kept me moving was the lasting _________ from my family and my best friends. They never looked down on me and they were supportive all the way through.

I had a strong will. I just kept _________ myself. Over and over again the situation convinced me to _________ but I did not! I told myself I was going to start a new life. Exams came and went and the _________were out. I was _________. It was my first exam since I started my new life. And I did it.

Looking back on my life, I find all the criticism (批評) that I’ve received is now not only a(n) _________ for me to do better, but something that tells me that no one can _________ you who you are. I’ve learnt no one will be able to _________ me. Everything is up to me. Whatever I choose or whoever I _________to be, it’s all up to ME!

I may not be a_________ person but I have a strong will.

1.A. hated B. ignored C. understood D. believed

2.A. early B. good C. hopeless D. sudden

3.A. uselessness B. relief C. weakness D. surprise

4.A. although B. because C. so D. but

5.A. levels B. choices C. purposes D. desires

6.A. finally B. immediately C. firmly D. truly

7.A. insisted B. escaped C. passed D. recovered

8.A. tiring B. satisfying C. unusual D. simple

9.A. suffered B. struggled C. regretted D. sighed

10.A. show B. explain C. introduce D. send

11.A. warning B. punishment C. support D. training

12.A. enjoying B. pushing C. teaching D. helping

13.A. take over B. give out C. give up D. take in

14.A. awards B. results C. efforts D. causes

15.A. nervous B. honest C. ashamed D. bored

16.A. encouragement B. lesson C. arrangement D. message

17.A. bring B. ask C. make D. award

18.A. protect B. influence C. defend D. accept

19.A. prove B. dare C. deserve D. want

20.A. smart B. lucky C. wise D. strong

查看答案和解析>>

同步練習冊答案