The human body is a living machine, and, like...

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

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

Of all the things we eat and drink，water is the1important.The human body can go 2 ________ food for a long time，but two3three days without water could make people4.

A lot of people don’t understand how5water the human body needs6well and many people don’t drink enough，esecially in7weather. Most people drink8they are thirsty but in fact they need more water，expecially when they take9.

A man’s body is 65 to 75 percent of10. If we don’t have enough water. We fell tired and may become ill.

1.A.more  B.most  C.less  D.least

2.A.with  B.on  C.without  D.by

3.A.or  B.and  C.of  D.but

4.A.died  B.to die  C.dies  D.die

5.A.many  B.little  C.few  D.much

6.A.work  B.working  C.to work  D.works

7.A.hot  B.cold  C.cool  D.warm

8.A.so  B.that  C.when  D.since

9.A.fun  B.exercise  C.exercises  D.work

10.A.blood  B.water  C.air  D.food

九年级英语完型填空中等难度题查看答案及解析

The human brain's power could compete with any machine. And now a group of scientists from across Europe are trying to build one using the world's most p1. computer.

Our brains have 100 billion neurons Each one performs billions of ‘calculations’ second　 s2. to a desktop computer.

So the brain computer will need to be able to do a billion calculations.

Finding a way to power the supercomputer will be one of the Scientists' major challenges. They hope to c3. it within 12 years.

Group leader, Professor Henry Markram, said, “The billions of interconnected neurons make it hard for us to truly understand how the brain works. Simulating it will make it much e4. allowing us to operate and measure any aspect of the brain.”

The brain will be built in facility in Germany. It will have thousands of 3D images, so scientists can “fly” around different areas and w5. how they communicate with each other.

If the “brain” works, it will help scientists understand brain diseases such as Parkinson's, and know more about how we think and make d6..

There are concerns about the consequences of the computers which can think for themselves. But Professor Markram said “This is one of the t7. great challengers for humans. We need to understand earth, space and the brain. We need to understand what makes us human.”

九年级英语单词填空简单题查看答案及解析

I think all the heavy and difficult jobs 　　　　 by machines and robots in the future.

A. do　　 B. will do

C. are done　　 D. will be done

九年级英语单选题中等难度题查看答案及解析

In the modern age, human society runs on energy. Most machines need electricity to operate. Humans cannot live without electricity even a single day in their daily life and work. They have many different ways to create electricity. But some ways are harmful to the environment.

For example, fossil fuels (化石燃料) are the most common kind of energy.They include coal, oil, and natural gas. First, people have to dig them from the ground. This can sometimes harm the environment. However, scientists are creating cleaner and better ways to do that these days. So the environment is not harmed as much as before. But when people burn these fossil fuels, they can give off a lot of harmful gases, which is considered to be one of the greatest causes of global warning. This might harm the environment.

Tidal (潮汐) energy is another way to make electricity. This uses the ocean tides to make electricity. But some kinds of tidal energy can kill many fish and other sea animals. Also dams (大坝) can create lots of clean energy. But dams create lakes and change the way that rivers run. So they can do great harm to the balance of nature around the lakes and along the rivers.

Nuclear (核) energy is a very powerful form of energy. It is cheap. It is also very clean. But many people are afraid of it because it uses radioactive materials. Also, there have been some very serious accidents in the past which caused great harm to human and nature. But the technology is much better these days. so many countries are starting to use nuclear energy more.

1.In Paragraph I the underlined part “human society runs on energy” means “______”.

A.humans in the society waste much energy B.people use energy to make the world work

C.our society is full of varied kinds of energy D.humans cannot run fast without energy

2.According to the passage, which of the following is TRUE about fossil fuels?

A.They are dug from the ground. B.They are considered expensive.

C.They hardly harm the environment. D.They are not widely used in the world

3.From the passage, we know that tidal energy can ______.

A.cause serious accidents B.change the way that rivers run

C.give off a lot of harmful gases D.kill many living things in the ocean

4.Many countries start to use nuclear energy more because ______.

A.it’s a common kind of energy B.people are not afraid of it now

C.it’s cheap, clean and safer than before D.people can’t live without it

5.The passage is probably in the part of ______ in a newspaper.

A.health B.science C.culture D.sports

九年级英语阅读单选困难题查看答案及解析