The Internet has opened up a whole new online world for us to meet, chat and go where we've never been before. But just as in face to face communication, there are some rules of behavior that should be followed when on line.

    {#blank#}1{#/blank#} Imagine how you'd feel if you were in the other person's shoes. For anything you're about to send，ask yourself, ＂Would I say this to the person's face?＂ If the answer is no, rewrite and reread.{#blank#}2{#/blank#}

     If someone in the chat room is rude to you, your instinct (本能) is to fire back in the same manner. But try not to do so. {#blank#}3{#/blank#} If it was caused by a disagreement with another member, try to fix the situation by politely discussing it. Remember to respect the beliefs and opinions of others in the chat room.

    {#blank#}4{#/blank#} Offer advice when asked by newcomers, as they may not be sure what to do or how to communicate. When someone makes a mistake, whether it's a stupid question or an unnecessarily long answer, be kind about it. If it's a small mistake, you may not need to say anything. Even if you feel strongly about it, think twice before saying anything. Having good manners yourself doesn't give you license to correct everyone else. {#blank#}5{#/blank#} At the same time, if you find you are wrong, be sure to correct yourself and apologize to those that you have offended. It is not polite to ask others personal questions such as their age, sex and marital status. Unless you know the person very well, and you are both comfortable with sharing personal information, don't ask such questions.

    Why do we go to zoos? Millions of people around the world visit zoos each year, but the reason is hard to explain .{#blank#}1{#/blank#} But the animals they see in zoos are little like the toys, cartoons, and decorations that fill their homes. For such children, meeting with real animals can be confusing, even upsetting.

    The great interest that children have in animals today might lead one to suppose that this has always been the case. {#blank#}2{#/blank#}That was also when zoos became an important part of middle-class life.

    {#blank#}3{#/blank#}They lived together with our ancestors in a shared natural environment. In the Industrial Era, the human domination (支配)of animals could be seen in the popularity of real-looking animal toys. Children rode rocking-horses that had realistic features, and they slept with bears, tigers, and rabbits that looked and felt almost real. The Twentieth Century marked a further development--the change of animals into people.

    This was the age of Babar the Elephant, Hello Kitty, and the Lion King. Parents and children had previously wanted animals that looked like animals.{#blank#}4{#/blank#}.

    In a zoo they hope to see the living breathing versions of their character friends. They find instead unfamiliar creatures who cannot speak, smile, or interact with them. For this reason, a visit to the zoo can be disappointing for children today.{#blank#}5{#/blank#} Meeting real animals reminds us forcefully of the boundary between imagination and reality.

    When we visit animals in a zoo, perhaps we will recall our true relationship not only to animals but to the entire world.

A. Animals are the best friends of the human beings.

B. Most of children are looking forward to visiting zoos.

C. Perhaps that disappointment is the best gift a zoo can offer.

D. But now they want animals that look and act like humans

E. Yet, it was not until the Industrial Era that animals became part of childhood.

F. In prehistoric times, there had been no zoos, as animals were a real part of the human world.

G. Many of those visitors are children, whose lives are already surrounded by animals' images.

    Artificial intelligence（AI，人工智能）can help us make phone calls, guide us to where we want to go, or play games. {#blank#}1{#/blank#} Researchers from Microsoft recently created the first machine translation system that can translate news articles from Chinese to English, Business Standard reported.

    According to Microsoft's official website, researchers tested the system by asking it to translate hundreds of sentences taken from news stories.{#blank#}2{#/blank#}They concluded that the system's translations were as good as the human translations. {#blank#}3{#/blank#}This is partly because different words can be used to express the same meaning. It can be hard to say which word is more “correct”.

    {#blank#}4{#/blank#}“Much of our research is really inspired by how we humans do things,” lead researcher Liu Tieyan said.

    One method is called dual learning（对偶学习）. In this method, the system translates every sentence from Chinese to English, as well as translating the sentences back from English into Chinese.{#blank#}5{#/blank#}This is similar to what humans do to make sure their translations are accurate.

        Another method makes use of deliberation networks. This is when the system is made to translate the same sentence over and over. Gradually, the system improves the quality of its translation, like humans who would improve their own writing by going over it again and again.

A. Machine translation is always challenging.

B. However, experts used several methods to improve the system's translation abilities.

C. Then, language experts compared the results to two translations that were done by humans.

D. Researchers collected a lot of data to help the system learn and improve.

E. And now, AI can do even more things.

F. Researchers have worked on machine translation for decades.

G. This way, the system can improve itself and learn from its own mistakes.

How to improve your studies—scientifically

Our brain can possibly memorize 2. 5 petabytes（千兆）of information. In order to use some of that surprising capacity（能力）a little more effectively when you learn, here are some tips that are based on widely-accepted research by learning experts.

{#blank#}1{#/blank#}.

    Some enjoy watching videos over reading books, others study with friends, and some like sitting in silence among a million books. Everybody is different.

Hard things first

    {#blank#}2{#/blank#} , so do the things that are difficult first. Once you are done with the hard things, you will feel better for the rest of the day, and probably more motivated to get other things done.

    Space（分隔开）your studies

    {#blank#}3{#/blank#} . Facts or vocabularies, for example, are best learned if you review them the first time one to two days after the study, and then again after one week, and after one month.

    Instant self-test

    After your study, finish up with a quick quiz. Immediate recall in the form of a test or a short summary on what you've just learned can increase retention（记忆力）by as much as 30%. {#blank#}4{#/blank#}, that extra effort creates deeper traces（痕迹）in your memory.

    Don't force it

    Motivation is like hunger. You cannot force yourself to be motivated, just like you can't tell someone else to be hungry. So, if you are not hungry right now, don't worry. {#blank#}5{#/blank#}.

A. Take fun seriously

B. Find your own style

C. Take a break, and do something else

D. Good memory can grow your brain's potential

E. Because it's much harder for your brain to remember than to read

F. Like most people you have the strongest willpower in the morning.

C. to remember things for a longer time, repeat the material after taking several breaks

Rich and Famous

    Twenty years ago the most common ambition of American children was to be a teacher, followed by working in banking and finance, and then medicine. But today's situation is quite different. {#blank#}1{#/blank#} Instead they most commonly say they want to be a sports star, a pop star, or an actor­in other words, they hope to become a celebrity .

    According to experts, young people desire these jobs largely because of the wealth and the fame. {#blank#}2{#/blank#} Let's take athletes and singers as an example. Their careers are short­lived. Many athletes' best time only lasts a few years and singers can have a very limited career. The field that was once the focus of their lives becomes something they have little or no involvement in. As a result, they'll have a feeling of worthlessness and a lack of control. {#blank#}3{#/blank#} The truth is quite simple: they have been so far removed from it for so long.

    In spite of these disadvantages, there is greater ambition than ever among young people to achieve that status. They are not satisfied just making a living­they want to be rich and famous. Globally, more and more TV shows provide talent competitions where winners can achieve their goals in just a few weeks or months. {#blank#}4{#/blank#} They unrealistically believe that this lifestyle is easily obtained and leads to great satisfaction.

    While many people argue that there is nothing wrong with having such ambitions, others feel that this trend will finally lead to dissatisfaction as more and more people are unable to reach their goals. {#blank#}5{#/blank#}That means they ignore the simple fact that great effort is needed before success. As a result, many people won't realize their childhood dreams, which could have a negative effect on their happiness.

A. The younger generation don't favor these professions any more.

B. In many ways this has been brought about by the celebrity culture.

C. Unfortunately, they do not always have a positive effect on people's life.

D. Besides, it can be difficult for them to adapt back to a normal everyday life.

E. People no longer have a sense of satisfaction once their goals have been achieved.

F. This quick way of gaining wealth and fame creates a celebrity culture among people.

G. The reason is that they don't realize it takes talent and hard work to be rich and famous.

Symptoms of Dehydration(脱水)

    You're bad- tempered.

    Researchers tested the mood and concentration of 25 women who drank healthy amounts of water one day, and then didn't over the next two days. When slightly dehydrated, the women reported tiredness, bad temper, headaches, and difficulty focusing. In a separate test, men with mild dehydration also had trouble with mental tasks. {#blank#}1{#/blank#} Scientists are still trying to figure out why.

    You have a bad workout.

    {#blank#}2{#/blank#} It impacts how much you can push yourself. Even a 2 to 3 percent fluid loss affects your ability to get a good workout and more than 5 percent dehydration decreases exercise capacity by about 30 percent. A no-brainer way to avoid dehydration and dehydration symptoms is to aim for this much water per day.

    {#blank#}3{#/blank#}

    Driving while dehydrated may be just as dangerous as getting behind the wheel drunk, in terms of how many mistakes you could make on the road. British researchers had participants take two-hour drives [using a simulator (模拟器). When they drank enough water, there were 47 driving errors. {#blank#}4{#/blank#}

    You feel dizzy when you stand up too fast.

    One of the signs of dehydration is when your blood volume and pressure drops, it can leave you feeling dizzy or faint, or bring on that rush of light-headedness after you quickly get up from sitting or lying down.

    The exact treatment for dehydration symptoms depends on age and how severely dehydrated someone is. {#blank#}5{#/blank#} Most of the time, however, people use some over-the-counter solutions for kids, and adults can drink more water

A. You drive like you're drunk.

B. Dehydration can be life-threatening.

C. To get rid of dehydration you have to replace lost water.

D. In extreme cases, people might go to the hospital for a treatment.

E. Dehydration reduces blood pressure and makes the heart work harder.

F. But when it came to mood changes, women changed much more than men's.

G. But when they are short of water, there were more than doubled driving errors to 101.