DNA is the whole “map”of the human body. It i...

DNA is the whole “map”of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Mr. Mendel discovered why we look the same as other people in our family. It is because of small things called “genes(基因)” in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages. They’re written in the DNA with a special language.

In 1961, another two scientists found the first “word”that could understand in that language. It shows how DNA tells the cell (细胞) to build its parts. So far, scientists have found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word”means, we can help to save people from several illnesses. So the more we understand. The more doctors will be able to do.

Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words”and find out more information, we will use it in the wrong way, just to make people more attractive(有吸引力的) , or stop sick people getting jobs.

1.When did Mr. Mendel discover why we look the same as other people in our family?

A. In 2000.　　　 B. In 1961.　　　　　 C. In 1953.　　　　 D. In 1860.

2.How can we help sick people if we understand more “words” in the DNA map?

A. Make better medicine.　　　　　　　 B. Make them get jobs.

C. Make maps for them.　　　　　　　　 D. Make them attractive.

3.Which one is NOT true according to the article?

A. We look like our parents because of “genes”in our body.

B. We have understood what all the words in the DNA map do.

C. DNA is the whole “map”of the human body.

D. DNA tells the cell to build its parts.

九年级英语阅读理解困难题查看答案及解析

DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Mr. Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”（基因）in our body. In 1953, two scientists, Watson and Crick, found out that genes are really messages. They’re written in the DNA with a special language.

In 1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell (细胞）to build its parts. So far, scientists have found all the words in the DNA map, but we still don’t understand what they all do. By understanding what just one “word” means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.

Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words” and find out more information, we will use it in the wrong way. Just to make people more attractive (有吸引力的), or stop sick people getting jobs.

1.When did Mr. Mendel discover why we look the same as other people in our family?

A. In 1680.        B. In 1860.        C. In 1953.        D. In 1961.

2.Watson and Crick found ______ in 1953.

A. all the words in the DNA map　　

B. small things called “genes” in our body

C. the first “word” they could understand in that language

D. genes are written in the DNA with a special language

3.How can we help sick people if we understand more “words” in the DNA map?

A. Make better medicine.            B. Make them get jobs.

C. Make maps for them.　　　　　　     D. Make them attractive.

4.Which one is NOT true according to the passage?

A. We look like our parents because of “genes” in our body.

B. We have understood what all the words in the DNA map do.

C. Scientists have found all the words in the DNA map.

D. DNA tells the cell to build its parts.

5.What do people think about this research about DNA?

A. It can be only bad.

B. It can be only good.

C. It can be good but won’t work.

D. It can be good or bad.

九年级英语阅读理解极难题查看答案及解析

DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time, In1860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”(基因) in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages . They’re written in the DNA with a special language.

In1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell﹙细胞﹚to build its parts. So far, scientists have found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word ”means, we can help to save people from several illness. So the more we understand, the more doctors will be able to do.

Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words” and find out more information, we will use it in the wrong way, just to make people more attractive (有吸引力的)，or stop sick people getting jobs.

1.When did Mr Mendel discover why we look the same as other people in our family?

A. In 2000.     B. In 1961      C. In 1953     D In 1860

2.What did the two scientists find in 1961? They found_____.

A．all the words in the DNA map

B．Small things called “genes” in our body

C．The first “word” they could understand in that language

D．those small parts are written in the DNA with a special language

3.How can we help sick people if we understand more “words” in the DNA map?

A．Make better medicine.                   B．Make them get jobs.

C．Make maps for them.                    D．Make them attractive

4.Which one is not true according to the article?

A．We look like our parents because of “genes” in our body

B．We have understand what all the words in the DNA map do

C．DNA is the whole “map” of the human body.

D．DNA tells the cell to build its parts.

5.What do people think about this research about DNA?

A．It can be only bad                       B．It can be only good

C．It can be good but won’t work            D．It can be good and bad

九年级英语阅读理解中等难度题查看答案及解析

DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Mr. Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”（基因）in our body. In 1953, two scientists, Watson and Crick, found out that genes are really messages. They’re written in the DNA with a special language.

In 1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell (细胞）to build its parts. So far, scientists have found all the words in the DNA map, but we still don’t understand what they all do. By understanding what just one “word” means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.

Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words” and find out more information, we will use it in the wrong way. Just to make people more attractive (有吸引力的), or stop sick people getting jobs.

1.When did Mr. Mendel discover why we look the same as other people in our family?

A. In 1680.　　　　　　　　　 　　　　　　　　　 B. In 1860.　　　　　　　　　 　　　　　　　　　 C. In 1953.　　　　　　　　　 　　　　　　　　　 D. In 1961.

2.Watson and Crick found ______ in 1953.

A. all the words in the DNA map　　

B. small things called “genes” in our body

C. the first “word” they could understand in that language

D. genes are written in the DNA with a special language

3.How can we help sick people if we understand more “words” in the DNA map?

A. Make better medicine.　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 B. Make them get jobs.

C. Make maps for them.　　　　　　 　　　　　　　　　 D. Make them attractive.

4. Which one is NOT true according to the passage?

A. We look like our parents because of “genes” in our body.

B. We have understood what all the words in the DNA map do.

C. Scientists have found all the words in the DNA map.

D. DNA tells the cell to build its parts.

5.What do people think about this research about DNA?

A. It can be only bad.

B. It can be only good.

C. It can be good but won’t work.　　　　　　　　　

D. It can be good or bad.

九年级英语阅读理解困难题查看答案及解析

DNA is the whole "map" of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In I860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called "genes"(基因) in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages. They’re written in the DNA with a special language.

In 1961, another two scientists found the first "word" that they could understand in that language. It shows how DNA tells the cell (细胞)to build its parts, the words in the DNA map, but we still do not understand what they all do. By understanding what just one "word" means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.

Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more "words" and find out more information, we will use it in the wrong way, just to make people more attractive, or stop sick people getting jobs.

1. The two scientists found ______in 1961.

A. all the words in the DNA map

B. small things called "genes" in our body

C. the first "word" they could understand in that language

D. those small parts arc written in the DNA with a special language

2.How can we help sick people if we understand more "words" in the DNA map?

A. Make better medicine.

B. Make them get jobs.

C. Make maps for them.

D. Make them attractive.

3.Which one is NOT TRUE according to the article?

A. We look like our parents because of "genes" in our body.

B. We have understood what all the words in the DNA map do.

C. DNA is the whole "map" of the human body.

D. DNA tells the cell to build its parts.

4.What do people think about this research about DNA?

A. It can be only bad.

B. It can be only good.

C. It can be good but won't work.

D. It can be good and bad

九年级英语阅读理解中等难度题查看答案及解析

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（蛋白质） 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)

1.How many calories are needed to raise the temperature of 5kg of water from 35℃ to 90℃?

2.Which of the following contains the most amount of calories?

3.Who needs the most amount of calories each day?

4.Which of following is True?　　

5.This passage mainly tells us ______.

九年级英语阅读理解中等难度题查看答案及解析

The human brain is very small and light only two percent of our total body weight, but it needs about 20% of the oxygen(氧气) that our body takes in. We can't think well if our brain isn't getting enough oxygen, so always make sure there is enough oxygen in the air when you need to learn or remember something. No one can remember everything. but everyone can learn how to improve their memory. Here are some suggestions ---none of them can make your memory 100% perfect, but all of them are helpful.

When you want to remember something, tell a friend about it. This way the new information becomes more memorable. Later on, think about the conversation with your friend. It will remind you of the information you wanted to remember.　　

Don't over-train your brain. When you've remembered a list of new words, stop studying. It's better to study a lot of material for a small amount of time than a small amount of material for a lot of time! But remember you do have to practice your new words regularly!

Our memory works well when we are asleep. If you want to remember something, go to bed and go to sleep right now after learning it.　

If you have to remember something big, divide it into small parts. It's easier to remember 198756430387 if you divide it into four smaller bits:198-756-430-387.

If you want to remember a piece of information, and you can't, don't get angry. Relax and tell yourself, "If it's important, I will remember it later.”

One of the best ways of remembering is to make pictures on the movie-screen of your mind and it's fun, too! Scientists say that our brain works a lot in pictures. So sometimes, if we want to remember new information, it helps to make a picture story. Anyone can learn to do this.

1.If you Weigh fifty kilograms, how heavy is your brain?

A.About ten kilograms.

B.About two kilograms.

C.About one kilogram.

2.How many helpful suggestions are mentioned in the passage?

A.Five. B.Six. C.Seven.

3.What should someone do after he has remembered a list of new words?

A.He should rest, then practice them regularly.

B.He should tell himself about what he has done.

C.He should continue to remember more new words.

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

A.It's useless to remember something before going to sleep.

B.It's easier to remember something by dividing it into small parts.

C.It's harder to remember something by changing words into pictures.

5.What's the best title of this passage?

A.An introduction to our brain.

B.Some good ways of learning.

C.Advice on improving our memory.

九年级英语阅读单选简单题查看答案及解析

—Could you help me put up the maps on the wall?

—______________. I’ll do it for you right away.

A. That’s all right　　 B. I hope so　　 C. No problem　　 D. That’s right

九年级英语单选题中等难度题查看答案及解析

Tips for Keeping Your Body Healthy

It is not common for the human body to sit for a long time in the old days. But now sitting for a long time every day is common. Sitting for a long time is dangerous for your health. You can hurt your arms and your neck.1.

People who work in offices often have health problems. People who travel many hours on planes often say they feel bad at the end of a long trip. The following tips can help you if you don’t want any problems.

Sit correctly. Keep your back straight and your feet on the floor. It is very necessary to have a comfortable chair. 2..

Take breaks often. Don’t sit for more than thirty minutes.3.). Having a break can help you do more work in the day.

4.. Water cleans your body and keeps healthy. It’s good for you and gives you energy. But please don’t drink lots of coffee or tea.

Move your body. Stretching (拉伸) is a simple and quick way of moving your body while you are sitting down. Stretch your arms, your hands and your shoulders.5..

A. You can also hurt your back

B. Drink water

C. Stand up and have a break

D. Don’t stretch a lot if it hurts

E. The chair can help you sit correctly

九年级英语七选五中等难度题查看答案及解析

DNA is in every cell ( 细 胞 ) of our bodies except for our red blood cells. It stores the information your body needs to make you who you are. Your DNA is 99.5% the same as everyone else on the planet. The 0.5% that we don't share with everyone else is the bit that makes you different.

DNA is the mysterious code ( 神秘密码 ) of life. It not only decides your gender ( 性别 ) and appearance, but also tells you about your family history, as well as your relations with people in other parts of the world.

Last fall, 20 students at Coretta Scott King Young Women's Leadership Academy in Atlanta learned more about who they are through a DNA test.

During their life sciences class, the girls took samples ( 样本) from their cheeks and sent them to Living DNA, a UK—based DNA testing company. From the test results, they learned about their ancestry ( 祖先 ) and made real-world connections to their races.

Lizbeth Islas, 12, learned about her family's Central American roots ( 根，根源 ) from her mother, who is Guatemalan ( 危地马拉人 ). She expected to share DNA with 54% of Native American people, but she was surprised to find that she also shared DNA with people living in Africa and Europe.

Elianed Guzman, 13, knew little about her family except that they were from Mexico. She was surprised to learn that she also shared DNA with people in China and Japan.

The girls gathered in small groups to wait for their results. Their reactions reached from confusion to surprise. The 13-year-old Amariah Caudle said she learned that "the color of your skin can't decide where you are from."

Diahan Southard, a manager from Living DNA, helped them understand the test results. "Does it change how you see yourself?" Southard asked.

"Now I know I have family from everywhere," said Jahtmya Phillips, 13. "Does it change how you see the girls around the table?" Southard asked. "We are all sisters," said Anike Akanni-Jenkins, 13.

Laura Pena, the school's class designer, said she hopes to add DNA testing to the school's ninth grade curriculum ( 课程 ) in the future. "This is not a lesson they will forget anytime soon," she said.

1.Which of the following about DNA is NOT TRUE according to the passage?

A.DNA decides your gender and appearance.

B.DNA can tell you about your family history.

C.99.5% of your DNA is different from other people.

D.DNA can find your relations with people in other parts of the world.

2.Guzman shares DNA with people in　　　 .

A.Africa B.Australia C.Europe D.Asia

3.What did the students learn from the program?

A.People need to accept who they are.

B.Everyone in the world is connected to others.

C.We should learn more about our family history.

D.People's personalities can be explained by their roots.

九年级英语阅读单选中等难度题查看答案及解析