The human body is a living machine, and, like all machines, it needs “fuel” to supply it with energy. This is provided by the food we eat. But how much do we need to stay healthy?
The energy value of food is usually measured in calories(卡). A calorie is the amount of heat required to raise the temperature of 1 kg of water by 1℃. The number of calories people need per day is different, as the picture shows. Also, the number of calories you use at any one moment normally depends on the activity you are in. For example, you need more calories for standing than for sitting, more for running than for walking, and so on.
The energy in food is in the form of three kinds of chemical materials—carbohydrate(碳水化合物), protein(蛋白質(zhì)) and fat. Carbohydrate provides 3.8 Cal /gm of the energy, protein 4.0 Cal/gm, and fat 8.8 Cal/gm. Each food contains different amounts of these materials, as the round pictures show.
(P= protein      C= carbohydrate    F=fat)
小題1:How many calories are needed to raise the temperature of 5kg of water from 35℃ to 90℃?
A.55.B.175.C.325.D.275.
小題2:Which of the following contains the most amount of calories?
A.Milk.B.RiceC.Peanuts.D.Milk or peanuts.
小題3:Who needs the most amount of calories each day?
A.A woman.B.An office worker.C.A farmer.D.A boy aged 16.
小題4:Which of following is True?  
A.You need more calories for swimming than for mountain climbing.
B.A child aged 8 needs the same amount of calories every day as a man over 70 does.
C.A woman feeding baby needs over 4 times the amount of calories that a baby does.
D.Everyone needs the same amount of calories per day.
小題5:This passage mainly tells us ______.
A.a(chǎn)ll the energy is in food
B.the human body needs energy
C.the number of calories depends on your activity
D.we must only eat peanuts to get calories

小題1:D
小題2:C
小題3:C
小題4:B
小題5:C

小題1:理解計算題,根據(jù)文中語句“A calorie is the amount of heat required to raise the temperature of 1 kg of water by 1℃.”理解可知。5kg of water from 35℃ to 90℃need 5*(90-35)=275calories
小題2:生活常識題,根據(jù)生活常識可知。
小題3:細節(jié)理解題,根據(jù)文中語句“the number of calories you use at any one moment normally depends on the activity you are in.”理解可知。
小題4:理解推斷題,根據(jù)文中語句理解推斷可知。
小題5:理解歸納題,根據(jù)文中語句理解歸納可知。
練習冊系列答案
相關習題

科目:初中英語 來源:不詳 題型:閱讀理解

Do your kids ask a lot of questions? If they do, that’s great. Because that’s how children learn. Some of these questions may be easy to answer. Others may be hard. And they want to get the right answers. Do your kids ask such questions?
●Why is the sky blue? Why is the sunset red?
●Why are leaves green?
●Why do leaves change color in autumn?
●How do airplanes fly?
Can you answer these questions? If not, don’t worry. Though Science Made Simple can’t help with all of life’s important questions, it can help with those. In this fast changing world, the more your children know about science, the better.
Get the help you need now, and every month you can get Science Made Simple online for only $11.95 for 10 issues(期). Click here: questions @sciencemadesimple. Com for more information. Remember, if you are not happy with your first issue, we will give back all your money.
小題1:What do we know about the kids who like asking questions?
A.They’re clever but lazy.
B.They often ask easy questions.
C.They are good at subjects.
D.They want to get right answers.
小題2:Which is TRUE about Science Made Simple?
A.It is an interesting storybook.
B.It can help with all of life’s important questions.
C.Parents can buy it on the Internet.
D.Parents can learn to play games with their children from it.
小題3:Which of the following can be found in Science Made Simple?
A.Painting skills.B.How airplanes fly.
C.The newest films.D.Travel routes(路線).
小題4:How much will you pay if you don’t like the first issue of Science Made Simple?
A.$11.95.B.$1.195.C.Nothing.D.$10.
小題5:The passage may be a(n)          .
A.a(chǎn)dvertisement(廣告)B.reportC.instructionD.invitation

查看答案和解析>>

科目:初中英語 來源:不詳 題型:完形填空

Flies (蒼蠅) usually live in the dirty places.
Let’s look at a fly, and see where it   27 . First, it flies out of the window,   28   it stands on   29  dirty things in the street, and then it flies back to the house and walks over your   30 .?
When a fly walks on the dirty things in the street, its   31   have got some germs  32 them. When the fly walks on your food with its dirty feet, it   33  the germs on your food.
What can you   34  this?
First, we learn that we mustn’t leave dirty things in the street or on the ground near  35 . Second, we learn that all food must be covered so that flies may not   36  it. Third, we learn that flies often carry germs and we must kill them as soon as we see them.
小題1:
A.walksB.standsC.livesD.flies
小題2:
A.firstB.secondC.thirdD.fourth
小題3:
A.someB.a(chǎn)nyC.everyD.each
小題4:
A.foodB.drinkC.cups D.bowls
小題5:
A.bodyB.feet C.eyes D.head
小題6:
A.inB.toC.onD.over
小題7:
A.carries B.hasC.leavesD.takes
小題8:
A.study fromB.study forC.learn forD.learn from
小題9:
A.the factoryB.our doorC.our houseD.a(chǎn) window
小題10:
A.a(chǎn)rrive B.getC.a(chǎn)rrive inD.get to

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

根據(jù)短文內(nèi)容判斷正誤,正確的在括號里填A, 錯誤的在括號里填B。
School bus safety starts with you, every morning and every afternoon. Take a few minutes to make sure your kids understand the rules of the road.
Most school bus accidents happen when children are outside the bus, and three quarters of these children are under the age of nine.
Make sure your children know these rules:
● Be on time.
● Never run to or from the bus.
● Stand away from the side of the road.
● Don’t push.
● Stay in your seat.
● Don’t shout.
● Always obey the driver.
● Wait for the driver’s signal before crossing.
● Always cross at least 10 feet in front of the bus.
● Never crawl(爬行)under a school bus.
Make sure that an adult is present at the bus stop every day, especially with children under the age of nine.
小題1:Most of the bus accidents happen to the children over nine.
小題2:When the children are old enough, parents don’t have to go with them.
小題3:We can cross if the bus driver wants us to go.
小題4:Most of the bus accidents happen inside the bus.
小題5:It is important for us to obey the road rules.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

A week ago, Columbus Middle School asked the parents of their school to choose a sport for their child to play. Here’s some information about the sports.
Sports 1: Basketball
We expect that this will be the most popular of the four sports. So students should sign up (報名) as soon as possible. Students will take a private bus to and from Kwun Tong Sports Park. Each student will have to pay $ 10 each time for the cost of the bus. There will be four basketball courts available for our use with one teacher watching over each game.
Sports 2: Gym
We will use St. Peter’s Park. There are two reasons for choosing this park. First, it is not very busy and crowded before 6:00 p.m. Second, it has lots of trees with plenty of shade. Students must bring along two bottles of water to prevent from being thirsty. All the activities here are free. And there will be a teacher on duty for each activity.
Sports 3: Hiking
Hiking (遠足)will be at Kowloon Peak. The activity will start at 2:30 p.m. and finish 90 minutes later. There will be 15 students in each group. And three teachers will be with the students. This sport will cost $ 75 per hour. Students should take plenty of water and sunglasses.
Sports 4: Swimming
The Kowloon City Swimming Centre is a 10-minute walk from our school. Four teachers will go to the pool and watch the students from the poolside. We will only be able to use the pool for one hour (2: 45 p.m. to 3:45 p.m.). Only students skillful at swimming can take up this activity. The pool will have two lifeguards on watch. Girls must wear swimming suits. The cost is $ 15 per visit.
小題1:The students of Columbus Middle School should __________.
A.sign up as soon as possibleB.choose a sport to play
C.a(chǎn)sk their parents to play a sport D.pay money for each sport
小題2:According to this passage, __________ will probably have the most students.
A.gymB.hikingC.swimmingD.basketball
小題3:One of the reasons for choosing St. Peter’s Park is that__________.
A.There is a lot of shade there
B.a(chǎn)ll the activities there are cheap
C.the park is very busy before 6: 00 p. m.
D.there aren’t many people after 6:00 p. m. there.
小題4:A student need to pay __________ if he goes swimming three times a week..
A.$ 10B.$ 15C.$ 45D.$ 75
小題5:From the passage, we know that __________.
A.students are able to take part in one of the four activities.
B.students will take a free bus to and from Kwun Tong Sports Park.
C.students should take plenty of water and sunglasses at St. Peter’s Park.
D.students can take a 10-minute walk to the Kowloon City Swimming from home.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解


I can’t remember when I started collecting litter(垃圾). But it was when I got tired of seeing litter near my home and realized that no one else was going to pick it up.
I live close to a forest in Ohio, America. I can walk there in three minutes! I used to love going there to play with my dog. But one day there was so much litter there that I became very unhappy. I decided to clean up the forest. I wanted to feel happy going there again.
I made my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes after starting to pick up litter, my bag was full! It had cans, bottles, broken glass and newspapers in it.
Since that first trip three years ago, I’ve gone to the forest four times a year to pick up litter. I’m often there for three hours. It makes me feel great to do something for the environment.
After each trip, I look at all the litter I’ve found. If any of it is recyclable(可回收的), I keep it. I can’t understand why people drop litter. But I will keep picking it up until they stop dropping it.
I know I can only do a small bit to help the earth, but I still think it is important.
小題1:.When did the writer begin to collect litter?
A.When he was very young.        
B.After his home moved to a new place.
C.When he realized no one else was going to pick it up.
小題2:.Where does the writer live?
A.He lives in a forest.
B.He lives near a forest.
C.He lives in a place with much litter.
小題3:.The writer collects litter       .
A.in order to make money          
B.in order to get a prize
C.in order to make the place clean
小題4:Where does the writer collect litter?
A.In the forest.           B.In the street.           C.In the park.
小題5:From the passage we infer(推斷)     .
A.the writer will go on with collecting litter 
B.the writer always collects a lot of litter
C.the writer thinks he does a great thing

查看答案和解析>>

科目:初中英語 來源:不詳 題型:完形填空

Air is all round us.It is around us___31____we walk and play.From the time we are born,air is around us on every side.When we sit down,it is around us.When we go to bed.a(chǎn)ir is  32 around us.We live  33 air.
All living things  34 air.Living things cannot live  35  air.We can live without any water for  36 days,but we cannot live for more   37 a few minutes without air.When we are working  38 running,we need more air.When we are asleep,we need less air
We live in air but we cannot see it.We can only feel it.We can feel it when it is  39 .  Moving air  40 wind.  
小題1:
A.ifB.becauseC.whenD.what
小題2:
A.tooB.a(chǎn)lsoC.eitherD.yet
小題3:
A.withB.byC.inD.a(chǎn)round
小題4:
A.needB.hopeC.wantD.1ike
小題5:A.have      B.have no    C,with       D.without
小題6:
A.littleB.a(chǎn) IittleC.fewD.a(chǎn) few
小題7:
A.a(chǎn)boutB.overC.thanD.then
小題8:
A.orB.a(chǎn)ndC.soD.but
小題9:
A.movingB.standingC.stoppingD.sleeping
小題10:
A.is 1ikeB.1ikesC.callsD.is called

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

People are busy working every day, so they do not have enough time to do exercises. As a result, many people become too fat or too thin. To keep our bodies healthy, we have to do exercises every day.
There are many kinds of exercises. Bending (彎腰) and stretching (伸展) helps us move easily. Before we play ball games or swim, it is better for us to do bending and stretching exercises first. This kind of exercise is sometimes called warm-up exercise. Running is also a good exercise. If we cannot run fast, we can Jog. Jogging means running slowly. Again, before we run or jog, we must do warm-up exercises. Also, we should not run or jog in busy streets. The air there is often dirty. Some people like weight lifting (舉重)because it can make their bodies strong. Also, we need to do some warm-up exercises before weight lifting.
How to do ____1_____.
Why do people need to do exercises?
People are busy _2_____ every day.                     Many people are too fat or too __3____.            Doing exercises every day can keep us __4_____.             
Different ____5___ of exercises.
Bending and stretching helps us _6_____ easily, sometimes we call it ____7_____ exercise;           ___8____ is a good exercise , too;                  We can ____9__ if we can’t run fast;              Weight lifting can make our bodies _____10___.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Photography is about taking photographs. In 1826, a Frenchman named Niepce needed pictures for his business. But he was not a good artist. So he invented a very simple camera. He put it in a window of his house and took a picture of his garden. That was the first photograph.
The next important date in the history of photograph was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything very clearly, even the smallest details. This kind of photograph was called a daguerreotype.
Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities and mountains.
In about 1840, the process was improved. The photographers could take pictures of people and moving things. The process was not simple. The photographers had to carry lots of films and processing equipment(設備). But this did not stop the photographers, especially in the United States.
Mathew Brady was a well-known American photographer. He took many pictures of famous people. The pictures were unusual because they were very life-like and full of personality. Brady was also the first person to take pictures of war. His 1862 Civil War pictures showed dead soldiers and destroyed cities. They made the war seem more real and more terrible.
In the 1880s, new inventions began to change photograph. Photographers could buy films readymade in rolls(卷). So they did not have to make the film themselves. Also, they did not have to process(沖洗) the film at once. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small hand-held camera made photography less expensive.
Photography is also a form of art. Some photographs were not just copies of the real world. They showed ideas and feelings, like other art forms.
Title: The    1  of Photography
Photography doesn’t only mean taking photographs; it is also a form of art. Photographs showed not only the real world, but also the ideas and feelings.
In 1826
A Frenchman named Niepce invented a very simple camera and the first photograph was    2  by him.
In 1837
Another Frenchman Daguerre invented a kind of photograph called    daguerreotype. People could see    3    things in the pictures.
In 1840
The photographers could take pictures of people and moving things
with lots of films and processing equipment.
In 1862
An American photographer Brady took many pictures of real and  4   things in the war. He was the first person to take war pictures.
In the 1880s
There were films readymade in rolls(卷). Photographers did not have to carry lots of equipment any more. The invention of the small  hand-held camera made photography  5 .

查看答案和解析>>

同步練習冊答案