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 similar to other people in our family. It is because of small things called “genes” in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are real messages. They are 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 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 to 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.
根据短文内容，请用完整句子回答下列问题。
1. Why do we look like our parents?
2. What did the two scientists find in 1961?
3. How can we help sick people if we understand more “words” in the DNA map?
4. What does the underlined word “They” refer to?
5. What can we know from the last paragraph?
相似题推荐
Look at the fruit in the picture. It is a durian(榴莲). Sometimes a durian can be as big as a football. The durian has a strong smell and taste. That depends on its special gene(基因).
It is said that the durian comes from Malaysia. Now in some countries such as Thailand and China, many people grow the durian. It is very popular in Thailand. In Southeast Asia, some people call it the the “king of fruits”.
Different people have different ideas about eating the durian. Some people love to eat it. They think it is very delicious. But some people don’t like to eat it because they think it stinks(散发恶臭). Do you like to eat it?
1—2完成句子；3简略回答问题；4题找出并写下第三段主题句；5题将划线的句子译成汉语。
1. Sometimes a durian can be as big as
2. In some countries such as
3. What do people in Southeast Asia call durian?
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5.
74.获取知识的最佳方法是什么呢？ If we learn by ourselves, we will get the most knowledge. If we are always getting answers from others and do not ask why, we will never learn well. 75. If we study in the right way, we will learn more and understand better.
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Can you fold paper in different ways to create different shapes, such as animals or flowers? Follow the directions below to learn how to make a beautiful swan. All you need is one square piece of paper.
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Fold the swan in half. Take the swan by its neck and pull the paper up. Keep pulling until it looks right to you.
Carefully fold the lower edges（边缘）toward the center of the paper as shown. Make sure the edges meet in the middle.
To make the swan's neck, fold the bottom point up. Fold down the head. You can change what the swan looks like by changing the length of the neck or of the head.
Turn the paper over. (The gray（灰色）shade means the back of the paper.) Fold the paper again. Make sure the edges meet in the middle.
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5. In which part of a newspaper can you see this passage?
| A．Life Tips | B．Paper Art | C．Healthy Life | D．Animal World |
【推荐1】Pollution is the most serious problem in the world. Pollution always goes with humans. There are many kinds of pollution.
Water pollution is one of the most serious kinds of pollution.
Water is very important to humans, because we can’t live without water. But now water is becoming dirtier and dirtier. Many of us throw rubbish (垃圾) into rivers. Many factories are polluting rivers, too.
I hope people could see this problem. If we don’t protect (保护) or save water, the drinking water will become less and less. But what should we do? Here are some suggestions:
First, we mustn’t throw rubbish into rivers. Second, we should plant more trees on both sides of the rivers. Next, we should stop the factories polluting rivers. Then, after washing the vegetables, we can use the water to clean the floor. Finally, when we see someone wasting water, we should stop him or her.
At last, I would like to say “To protect water is to protect life.” It’s our job to protect and save water. Let’s do it from now on.
根据短文内容，回答下列问题。
1. What is the most serious problem in the world?
2. Why is water important to humans?
3. What will happen if we don’t protect or save water?
4. Where should we plant more trees if we want to save water?
5. How many suggestions can you find from the passage if we want to protect water?
【推荐2】Confidence plays a very important role in people’s life. It gives people light when they are in dark and encouragement when they are depressed (沮丧的). It is the first step on the road to success. What is the secret of confidence? It is built, not inborn. You can try these simple tips for increasing your confidence levels.
Accept your failure. Anybody who’s out there really working hard is going to fail repeatedly. If you are not failing, you are not trying. Only when you face up to your difficulties, can you build up your confidence and give yourself a chance of success.
Dress your success. You don’t have to be beautiful to be confident. Make the most of your own special physical advantages and not always pay attention to your faults so that you know you are giving out your best image.
Listen to yourself: do not look down upon yourself. You are the only person who knows what is right for yourself. Don’t put others’ opinion above your own inner voice.
Build a confidence vocabulary. Stop putting yourself down, and stop keeping regretting about your tiny mistakes. Learn to highlight (强调) your advantages and the world will learn to see and admire them too.
Confidence is a plant that grows slowly. We should build confidence through constant and patient effort. Only when we have enough confidence in ourselves, can we take the first step on the road to success.
Title: Ways to | ||
| Introduction | Confidence is of much | |
Main body | Accepting your failure | Facing up to your difficulties can make you Failing means you are trying. |
| Dressing your success | Make good use of your own special physical advantages. Don’t always | |
| Know you are the only person who knows what is right for yourself. Avoid | ||
| Building a confidence vocabulary | Learn to highlight your advantages. | |
| Conclusion | Only when you have enough confidence in yourself, can you take the first step on the road to success. | |
American and British people both speak English, but sometimes it doesn’t seem like the same language.
First of all, they sound very different. Often, Americans don’t say all the letters in each word, especially consonants like “t” and “d”. For example, Americans may say “I dunno” instead of “I don’t know”. However, the British usually pronounce their consonants more carefully.
Also, some letters have different sounds. For example, Americans say the “a” in “half” like the “a” in “cat,” but the British say the “a” in “half” like the “a” in “aah.”
Sound is not the only difference between British English and American English. The two languages have words for some things. For example, the words for clothing are different. Americans use the word “sweater,” but the British say “jumper”.
Many other words and expressions are different in the two countries. In England, if you are going to telephone a friend, you “ring her up”. In America, you “give her a call”. The British use the word “lovely” to describe something they like. Americans use the word “cool” or “great”.
There are also some differences in grammar. For example, Americans almost always use the helping verb “do” with the verb “have”. They might say “Do you have an extra pen?” The British often ask the question in a different way. They might say “Have you got an extra pen?”
These differences can be confusing（令人混淆的）if you are learning English. But there is a reason for the differences. Languages change over time. When the same language is used in different places, it changes differently in each place. This is what happened to English. It also happened to other languages, such as French. Many people in Canada speak French, but their French is different from the French spoken in France.
1. Do Americans say all the letters in each word?2. Who use the word “sweater”, Americans or the British?
3. Why are there some differences in the same language?
4. What are the differences between British and American English?
5. What can you learn from the passage?
