欧美日韩一区二区区,91中文字幕在线视频,免费毛片在线不卡

精英家教網 > 初中英語 > 題目詳情

DNA is the whole “map” of the human body. It is something that all human 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 they could understand in that language. It shows how DNA tells the cell(細胞) 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 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.
小題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

小題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.

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

A．Make better medicine.	B．Make they get jobs.
C．Make maps for them.	D．Make them attractive.

小題4:Which one is NOT TURE 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.

小題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.

小題1:D
小題2:C
小題3:A
小題4:B
小題5:D

試題分析：這篇短文簡要的介紹了DNA的發現歷史，并介紹了這一發現對于人類生活的影響及人們對此的不同意見。
小題1:.細節理解題根據In1860, Mr Mendel discovered why we look the same as other people in our family. 描述，時間是在1860年，可知選D。
小題2:細節理解題根據In1961, another two scientists found the first “word” that they could understand in that language.描述，他們用那種語言理解的詞匯，可知選C。
小題3:細節理解題根據Most people hope that this will help to make better medicine and help sick people.及上文描述，可知選A，制作更好的藥物。
小題4:細節理解題根據So far, scientists have found all the words in the DNA map, but we still do not understand what they all do.可知選項B，描述錯誤。
小題5:細節理解題根據短文最后一段描述，可知人們對這一發現持正反兩方面的意見。故選D，可能好可能壞。

練習冊系列答案

68所名校圖書小升初高分奪冠真卷系列答案

伴你成長周周練月月測系列答案

小升初金卷導練系列答案

年級	高中課程	年級	初中課程
高一	高一免費課程推薦！	初一	初一免費課程推薦！
高二	高二免費課程推薦！	初二	初二免費課程推薦！
高三	高三免費課程推薦！	初三	初三免費課程推薦！
更多初中、高中輔導課程推薦,點擊進入>>

相關習題

科目：初中英語 來源：不詳 題型：閱讀理解

Cough Medicine
Do you always understand the instructions on a bottle of medicine? Here’s one for John. John is twelve years old. He had a bad cold and coughed day and night. He went to see a doctor. The doctor gave him some cough medicine. Please read the following instructions and see if you can understand them.

小題1: John should take ______ a day.
A. 1 teaspoonful         B. 2 teaspoonfuls       C 3 teaspoonfuls
小題2:The medicine should be kept in ______.
A. any place              B. hot water         C. a fridge
小題3:John should ______ before he takes it.
A. drink a cup of tea     B. eat nothing         C. shake the medicine well
小題4:When people are ______ years old, they cannot take medicine.
A. two                B. twelve                C. thirty
小題5:John will ______ the medicine when it is left after December 1st, 2010.
A. take once             B. throw away         C. take six times more

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

The human brain weighs about 1.4 kilograms, but it can hold much more information than most computers. However, there is another difference between humans and computers. Computers don't forget information they are given, but humans often do. No one remembers everything, and luckily we don't usually have to. But everyone can improve their memory if they want to. Here are some suggestions.
◆Try to use new informati6n immediately. For example, if you meet someone who says "Hi! I'm Carlos," don't just say "Hello." Repeat the person's name. Say"___________"
◆Break a big number into smaller parts. For example, it's hard to memorize (記憶) 109244153. But if you break it into three parts--109/244/153—it becomes easier.
◆Write out what you need to remember ever and over again. This will help you keep it in mind longer, especially for memorizing formulas (公式) or facts.
◆Always review information. If you bring what you've learned back to your mind, they become easier to remember. For example, before you go to sleep, it’s a good idea to review the new things you learned that clay.
◆Discuss with a friend. It is always easier to remember things through discussions. You can have a discussion about what's right and what's wrong, and it will lead to the right answer.
◆Never tell yourself that you have a bad memory. You can always do something to help improve your memory. And everyone's memory gets better if they use it often enough.
All of the suggestions are helpful. If you follow them, you are certain to improve your memory.
小題1:Which should be put in the blank (空格) in Paragraph 2？

A．Hello, Carlos.	B．How do you do?
C．Hello, I am Sophia.	D．Glad to meet you!

小題2:What can help memorize a big number more easily according to the passage?

A．To store it in a computer.

B．To break it into smaller parts.

C．To discuss it with a friend.

D．To review it before you sleep.

小題3:Which of the following is true according to the passage?

A．Discussing with friends can help you remember things.

B．Always reviewing information can help you fall asleep.

C．Formulas and facts can help you learn about your brain.

D．Human beings can improve their memory by computer.

小題4:What does the sentence "Never tell yourself that you have a bad memory” mean?

A．You should tell others about your bad memory.

B．You should believe in other people all the time.

C．You should ask others to improve their memory.

D．You should have confidence in your memory ability.

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

According to a new survey, students’ safety has become a big problem. Nearly 50% of students say they are worried about robbery on the way to and from school. Now in main big cities in China , some schools have taught an unusual lesson: self-protection. Students like this lesson because there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens.
Chen Haoyu, a teacher at Beijing No. 25 Middle School, gives young students advice on how to deal with danger.
If you are robbed
Keep calm. lf you can not cry for help or run away. Give the robber your money. Try to remember what the robber looks like and tell the police later.
If you are in a traffic accident
If a car hits you. You should remember the car number. If it is a bicycle, try to call your parents before you let the rider go. This is because you don't know how seriously you are hurt
If it is raining hard and there is lighting
Don’t stay in high places and stay away from trees.
When there is a fire
Get away as fast as yon can. Put wet things on your body and try to find an exit. Do not take the lift.
If someone is drowning
If you can’t swim, don’t get into the water. Cry out for help.
Remember that danger is never as far away as you think. Take care of yourself at all time!
小題1: Why do students like the self-protection lesson?
①Because there are no tests.
②Because the lessons are boring
③Because they can learn how to save lives.
④Because they can know how to stop danger before it happens.

A．①②

B．②③

C．①②④

D．①③④

小題2: What will you do if a bicycle hurts you?

A．I will remember the bicycle number.

B．I won't let the rider go until I call my parents.

C．I will let the rider go before I call my parents.

D．I will let the rider go because I know how seriously I am hurt.

小題3: lf your house is on fire, you must__________.

A．put dry things on your body

B．run quickly and take the lift

C．run away and find an exit as quickly as you can

D．take everything you have and then run away

小題4: There are ________ways of self-protection mentioned in the passage.

A．3

B．4

C．5

D．6

小題5: The best title for this passage is _________.

A．How to Keep Calm

B．Self-protection

C．An usual lesson

D．Danger

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

A large part of China experienced larger amounts of smog ( 霧霾 ) than usual this January and the air was badly polluted. The distance ( 距離 ) one could see was shorter than 1,000 meters in Beijing, Tianjin, and the provinces of Hebei, Henan, Shandong and Anhui. In some areas, it was down to 200 meters.
People usually set off firecrackers ( 爆竹 ) to celebrate Spring Festival. But because of the smog, this year seemed very quiet. It was really different. A man called Zhang Wei said that his friends and he hadn’t set off a single firecracker.
“ We all suffered ( 遭受 ) from last month’s smog. If we don’t call an end to the firecrackers, the environment will get worse and worse during the holiday. ” said Zhang Wei. He called on more people to set off fewer firecrackers during this year’s Spring Festival by putting up a notice in his neighborhood.
More Chinese looked forward to celebrating ( 慶祝 ) the holiday in a greener way . They decided not to set off firecrackers. They also decided not to waste food . They said the new celebrations sounded fashionable.
To clean the sky ,more than ten provinces including Guangdong, Zhejiang and Jiangsu have started to use national 4 standard ( 標準 ), which is expected to reduce ( 減少 ) vehicle emission ( 車輛排放 ) by 30% to 50%. Beijing even has started to use the stricter national standard.
We still have a lot to do to improve the air quality. For example, using public transportation as much as possible is not a hard thing for us to do, but it matters a lot .
小題1: What happened in a large part of China this January?

A．It experienced larger amounts of smog.

B．People set off lots of firecrackers.

C．There was a heavy rain.

D．Many car accidents happened

小題2:How do people usually celebrate Spring Festival in China ？

A．By putting up a notice	B．By setting off firecrackers
C．By not wasting food	D．By using public transportation

小題3:How many provinces have started to use national 4 standard?

A．Three

B．Six

C．Eight

D．More than ten

小題4: Which of the following is Not true according to the passage?

A．Zhang Wei didn’t set off a single firecracker this Spring Festival

B．We should use more public transportation to help reduce the air pollution.

C．Zhejiang has started to use national 4 standard to reduce vehicle emission.

D．More Chinese think the celebration of setting off firecrackers is fashionable.

小題5: What’s the best title for the passage?

A．How to reduce the vehicle emission

B．How to improve the air quality

C．What do Chinese do in Spring Festival

D．Using public transportation

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Grades aren’t everything, but if you or your parents are worried about your report cards, try some of these easy tips.
小題1:____________________Find out how much time you need to spend on each subject every week, and figure out from your teachers when the homework is due, and then make a schedule. According to the schedule, you are able to make a study pan.
小題2:_________________.Most teachers base grades on homework, and it’s easier to keep up with your assignments(作業) than it is to dig yourself out of a hole.
小題3:_________________Your teachers may have suggestions about what you can do to learn more and improve what you can’t. But you have to ask!
小題4:___________________When you get a bad grade, you probably get angry and sad. That’s normal, but you should also use the experience to try to figure out what went wrong so you can avoid the same mistake in the future.
Study with your friends. Sometimes it’s hard to get started on homework, so you may meet with one or two friends to do your work. But this won’t work if you and your friends decide to watch TV or play video games instead of doing your homework!

A. Do your homework.
B. Create a study plan.
C. Learn from your mistakes.
D. Talk to your teachers.

小題5:What’s the best title of the passage?

A．How to learn from others.	B．How to try tips.
C．How to do your homework	D．How to get good grades

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

We’ve talked about snails (蝸牛) and their slow move. But much of the time snails don’t move at all. They’re in their shells ---sleeping .
Hot sun will dry out a snail’s body. So at the least sign of hot sun, a snail draws its body into its shell and closes the opening with a thin cover. Then it goes to sleep. A snail will die in a heavy rain. So whenever it rains, it goes inside its shell house and goes to sleep. A snail can sleep for as long as it needs to. It can take a short sleep. Or it can sleep for days at a time. And it spends all the winter months in its shell, asleep.
In spring the snail wakes up. Its body, about three inches long, comes out of from the shell. When hungry, the snail looks for food. It can’t see very well. Its eyes, at the ends of the top feelers are very weak. But its sense of smell is very strong. It helps the snail to the new greens. Then the snail’s little mouth goes to work.
A snail’s mouth is no longer than the point of a pin(針). Yet it has 256,000 teeth! The teeth are so small that you can’t see them. But they do their work.. If you put a snail in a hard paper box, it will eat its way out. And if a snail wears out its teeth, it will grow new ones.
Mostly, a snail looks for food at night .But on cloudy days it eats in the daytime. It eats all day long. A snail can go on eating for hours and never feel full.
小題1:A snail__________.

A．moves more slowly in the daytime	B．has thousands of feet
C．doesn’t move at all	D．sleeps much of the time

小題2:In the sentence “A snail draws its body into its shell” the word “draw” means_________.

A．to make with a pen	B．to keep away from
C．to pull	D．to move to end

小題3:From the story we know_________.

A．the snail’s shell is very thin

B．a snail can’t see well

C．the snail’s nose is quite short

D．the snail’s body changes in different seasons

小題4:A snail goes to sleep when_________.

A．it feels hungry	B．it is put in a paper box
C．spring is coming	D．it rains heavily

小題5:Which of the following in not true?

A．A snail doesn’t like living under the sun.

B．In winter the snail doesn’t eat or move.

C．The snail’s teeth can’t be worn out..

D．The snail’s strong sense of smell helps to find things far away.

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

I often hear some students say English is difficult, and it gives them a headache. But English is very easy for me. I’m good at it. I’m very glad to tell you something about how I study English.
First, I think an interest in English is very important. When I learned English first, it was fresh for me. I was interested in it, so I worked hard at it. Soon we had an English exam and I got a very good mark. How happy I was! After that, I learned English harder and harder. Our English teacher often teaches us English songs, and the songs sound nice. I often think how interesting English is!
Second, I think English is a foreign language. I should learn it well in the following ways: Listen to the teacher carefully, speak bravely, read aloud and have a good vocabulary. Then practice again and again, never be tired. And I also have a good habit: Asking whenever (不論何時) I have a question. I must make it clear by asking our English teacher. How happy I am when I understand!
Besides this, I often read English stories, jokes and easy novels. They help me understand a lot of things. So to do more reading is an important way to learn English well. And I also write English diaries. English has become a close friend of mine.
小題1:Why do some students often “have a headache”？

A．Because they are easy to catch a cold.

B．Because it’s often very cold

C．Because they think English is easy.

D．Because they don’t think English is easy.

小題2:The writer tells us that we should be ___ in English if we want to learn it well.

A．kind

B．interested

C．angry

D．strict

小題3:The sentence “I got a very good mark” means ________.

A．I got a good way

B．I had a good idea

C．I did badly in the exam

D．I did well in the exam

小題4:The writer thinks English is interesting because ________.

A．English is full of stories

B．English is full of jokes

C．his teacher often teaches them nice English songs

D．of nothing

小題5:Which of the following is not the way the writer studies by?

A．Speaking bravely.

B．Writing to foreign friends.

C．Reading aloud.

D．Writing English diaries.

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

If you want to be a better reader，what should you know about the speed(速度)of reading? Some people read very quickly，when others read very slowly. But which one is better? The quick reader may be a good reader when he reads a story-book for fun. But he may not be able to slow down to read instructions(說明書) carefully. The slow reader may be a good reader. But he may spend too much time reading a story for fun. So the reader who reads everything quickly or the one who reads everything slowly isn’t really a good reader. Here are four things to remember about the speed of reading.
Knowing why you are reading will help you to know whether(是否) to read quickly or slowly.
Some things should be read slowly throughout. Examples(例子)are instructions for making or doing something. Math books，science and story-books are full of important information. You must read these things slowly to understand and remember every important idea.
Some things should be read quickly throughout. Examples are stories for enjoyment，letters from friends，and some news from newspapers.
In some of your reading，you must change your speed from fast to slow and slow to fast. You will need to read some pages quickly and then slow down and do more careful reading when you come to important ideas.
小題1:Which following is true?

A．Reading everything quickly is a good reader.

B．A slow reader isn’t a good reader.

C．Reading instructions must be carefully.

D．You must change your speed from fast to slow.

小題2:What does the underlined word “throughout” mean in the sentence?

A．開始

B．結束

C．始終

D．穿過

小題3:What should you read slowly when you read?

A．Letters from friends.	B．News from newspapers.
C．Picture-books for fun.	D．Important information from story-books.

小題4:Which one is the best title(標題)?

A．How to be a good reader.	B．How to read quickly.
C．Reading slowly is better.	D．Reading is a good hobby.

查看答案和解析>>

同步練習冊答案

練習冊

高中

初中

小學