Both men and women are living longer these days in industrialized countries. 1. In general, they can expect to live six or seven years more than men. One reason for this is biological.
One important biological factor that helps women live longer is the difference in hormones between men and women. 2. Between the ages of about 12 and 50, women produce hormones that are involved in fertility(生育能力). These hormones also have a positive effect on the heart and blood flow. In fact, women are less likely to have high blood pressure or to die from heart attacks.
3.They help the body defend itself against some kinds of infections. This means that women generally ger sick less often and less seriously than men. The common cold is a good example: women, on average, get fewer colds than men.4.Scientists are still not exactly sure how influence aging, but they believe that they do. Some think that a woman’s body cells have a tendency(向) to age more slowly than a man’s. Others think that a man’s body cells have a tendency to age more quickly.5.
A．However, women, on average, live longer.
B .The biological factor plays an important part.
C. Women are also helped by their female genes.
D. The female hormones also protect the body in another way.
E. Recent research seems to support both of these possibilities.
F. Therefore, women are more healthy than men and can live a better life.
G. Hormones are chemicals which are produced by the body to control carious body functions.
The Science of Risk-Seeking
Sometimes we decide that a little unnecessary danger is worth it because when we weigh the risk and the reward, the risk seems worth taking. 1. Some of us enjoy activities that would surprise and scare the rest of us. Why? Experts say it may have to do with how our brains work?
The reason why any of us take any risks al all might have to do with early humans. Risk-takers were better at hunting, fighting, or exploring. 2. As the quality of risk-taking was passed from one generation to the next, humans ended up with a sense of adventure and a tolerance for risk.
So why aren’t we all jumping out of airplanes then? Well, even 200,000 years ago, too much risk-taking could get one killed. A few daring survived, though, along with a few stay-in-the-cave types. As a result, humans developed a range of character types that still exists today. So maybe you love car racing, or maybe you hate it. 3.
No matter where you are on the risk-seeking range, scientists say that your willingness to take risks increases during your teenage years. 4. To help you do that, your brain increases your hunger for new experiences. New experiences often mean taking some risks, so your brain raises your tolerance for risk as well.
5. For the risk-seekers a part of the brain related to pleasure becomes active, while for the rest of us, a part of the brain related to fear becomes active.
As experts continue to study the science of risk-seeking, we’ll continue to hit the mountains, the waves or the shallow end of the pool.
A. It all depends on your character.
B. Those are the risks you should jump to take.
C. Being better at those things meant a greater chance of survival.
D. Thus, these well-equipped people survived because they were the fittest.
E. This is when you start to move away from your family and into the bigger world.
F. However, we are not all using the same reference standard to weigh risks and rewards.
G. New brain research suggests our brains work differently when we face a nervous situation.
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Everyone knows that fish is good for health.1.But it seems that many people don’t cook fish at home. Americans eat only about fifteen pounds of fish per person per year, but we eat twice as much fish in restaurants as at home. Buying, storing, and cooking fish isn’t difficult.2.This text is about how to buy and cook fish in an easy way.3.Fresh fish should smell sweet: you should feel that you’re standing at the ocean’s edge. Any fishy or strong smell means the fish isn’t fresh.4.When you have bought a fish and arrive home, you’d better store the fish in the refrigerator if you don’t cook it immediately, but fresh fish should be stored in your fridge for only a day or two. Frozen fish isn’t as tasty as the fresh one.There are many common methods used to cook fish.5.First, lean it and season it with your choice of spices(调料). Put the whole fish on a plate and steam it in a steam pot for 8 to 10 minutes if it weighs about one pound. (A larger one will take more time.) Then, it’s ready to serve.
A. Do not buy it. |
B. The easiest is to steam it. |
C. This is how you can do it. |
D. It just requires a little knowledge. |
E. The fish will go bad within hours. |
F. When buying fish, you should first smell it. |
G. The fats in fish are thought to help prevent heart disease. |
Secret codes (密码) keep messages private. Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.
People have used secret codes for thousands of years. 1.Code breaking never lags (落后) far behind code making. The science of creating and reading coded messages is called cryptography.
There are three main types of cryptography. 2.For example, the first letters of “My elephant eats too many eels” spell out the hidden message “Meet me.”
3.You might represent each letter with a number, for example. Let’s number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter, the message “Meet me” would read “13 5 5 20 13 5.”
A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book. 4.For example, “bridge” might stand for “meet” and “out” might stand for “me.” The message “Bridge out” would actually mean “Meet me.” 5.However, it is also hard to keep a code book secret for long. So codes must be changed frequently.
A. It is very hard to break a code without the code book.
B. In any language, some letters are used more than others.
C. Only people who know the keyword can read the message.
D. As long as there have been codes, people have tried to break them.
E. You can hide a message by having the first letters of each word spell it out.
F. With a code book, you might write down words that would stand for other words.
G. Another way to hide a message is to use symbols to stand for specific letters of the alphabet.
你的美国笔友John得知武汉因为新冠病毒引起的肺炎封城，学校不能如期开学，想知道你们现在在家如何学习。请你写一封回信。内容包括: 1.学习内容和方式；2.锻炼方式； 3.感想。
参考词汇： the novel coronavirus新型冠状病毒; pneumonia 肺炎; lockdown n.封城; quarantine隔离
注意：
1. 词数120左右；
2. 可以适当增加细节，以使行文连贯。
Dear John,
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
LiHua
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
注意：1. 每处错误及其修改均仅限一词:
2. 只允许修改10处，多者(从第11处起)不计分。
Welcome to the Great Wall. Measured more than 6,000 kilometers in length, the Great Wall is known as the long wall in the world. It had a long history of more than 2,000 years. That is amazing about the Great Wall is that it is main made of stones and bricks, and that all the construction was done by hand. As it was used to protecting the country from foreign invaders, every a few hundred meters along the Great Wall, there was a watchtower. Now, as a symbol of China, the Great Wall has become one of the most famous tourist attraction in the world. There is no wonder that the Great Wall attracts thousands foreign tourists every year.
