We are all busy talking about and using the Internet ,but how many of us know about the history of the Internet?

      Many people are surprised when they find that the Internet was set up in the 1960s.At that time, computers were large and expensive. Computer networks(网络)didn' t work well .If one computer in the network broke down, then the whole network stopped. So a new network system(系统) had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent through another part. In this way the computer network system would keep on working all the time. At first, the Internet was only used by the government, but, in the early 1970s, universities, hospitals and banks were allowed to use it too.

    However, computers were still expensive and the Internet was difficult to use. By the start of the 1990s, computers become cheaper and easier to use. Scientists had also developed software(软件) that made “surfing(浏览)” the Internet more convenient (方便).

    Today it is easy to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students.

   The Internet has now become one of the most important parts of people's life.

There are many colors in nature. But do you think that a color has weight? Let's do a test.

First, put two objects with the {#blank#}1{#/blank#} weight into two boxes. Then cover the boxes. Third, wrap (包裹) one box with a red piece of paper, the other with white. Now hold the boxes {#blank#}2{#/blank#} your hand one by one. Which one is {#blank#}3{#/blank#} ? It is certain that you will think the red one is heavier. Why do you think so? A scientist did many {#blank#}4{#/blank#} and found that different colors have different weights in a man's mind.

Also, scientists say that people accept the colors they like, and {#blank#}5{#/blank#} the colors they hate. So your body and mind will be {#blank#}6{#/blank#} by using the colors you like. Or you'll be nervous {#blank#}7{#/blank#} even get ill. For example, you {#blank#}8{#/blank#} blue and hate red. If you stay in a room with red windows and wallpaper for two hours, you'll feel you have been there for {#blank#}9{#/blank#} hours. But if the room is blue, you'll feel you have been there for only an hour, And, if a person walks {#blank#}10{#/blank#} of a blue room and into a red room, his temperature will rise. That means our body temperature will change with different colors.

As is known to us, microbes (微生物) help us do lots of things here on the earth. They can make bread rise and treat some illnesses among many other things. Researchers have done lots of experiments (实验) with microbes in space. And their latest findings show that these microbes could be very helpful for us to learn more about space.

Last summer, the European Space Agency did an experiment at the International Space Station. In this experiment, three kinds of microbes were tested on their ability to pull REES (稀土元素) out of rocks in three different kinds of gravity (重力).

This way of using microbes to get materials from rocks is known as bio-mining (生物开采). We've been doing it for some time here on the earth, mainly to get gold and other materials. But here comes a serious question. Would it work in space? These researchers found the proper answer in their experiments.

The results were encouraging. Of the three kinds of microbes. one was able to pull 14 kinds of REES out of rocks in all three kinds of gravity. The rocks used in the experiment were made of a kind of rock that is commonly found on the earth, Mars and the moon.

While the results might be useful, how can they help us learn more about space? For one thing, space research in the future will require us to find materials on the moon and Mars. Therefore, we are able to use these things to continue our research efforts. And bio-mining can help us do this cheaply and easily. It's one of the exciting news to the scientific field.

If stars do farming work, can they do a good job? You can find the answer in the farming show Become a Farmer.{#blank#}1{#/blank#} Its first season (季) was very popular. Now, Season 2 of the show is airing.

{#blank#}2{#/blank#} The size of their farm grew to 300,000 m². The young men stared to grow other kinds of crops like strawberries. They also made their fishpond larger and started a crayfish farm.

The show is very popular and what they grew has sold out. {#blank#}3{#/blank#} They used the show's popularity to help more farmers across the country do better. {#blank#}4{#/blank#} He wants to help chili pepper () farmers make more money in his hometown of Chongqing.

"{#blank#}5{#/blank#} And we want to help farmers live a better life," Wu Han, who made the show, told China Daily.
 

No one lives without food. For centuries, people grew their own food and {#blank#}1{#/blank#}(吃) it themselves. But now most people buy food in shops and {#blank#}2{#/blank#}(超市). The next time you have dinner, look close at the food on your plate. If you're dining in summer, it's possible that some of the food comes from small {#blank#}3{#/blank#}(私人的)farms, but more of it comes from large farms and companies.

How do you know where your food s from? You an check by {#blank#}4{#/blank#}(你自己). Most food gives information on its packet. And you may be surprised at what you {#blank#}5{#/blank#}(收集) because it comes from places around the world. You can enjoy a(n) {#blank#}6{#/blank#}(橙子)from Sooth Africa and a tomato from Mexico. You can {#blank#}7{#/blank#}(甚至) enjoy a pizza from Italy. And you needn't travel to these places. Instead, the food travels to you. Thanks to{#blank#}8{#/blank#}(现的) trucks, trains, ships and {#blank#}9{#/blank#}(飞机), the food travels fast. So the food is {#blank#}10{#/blank#} (新鲜的) and heartly when it reaches your dinner table. Also, now technology helps the food last long while it travels.

Fewer than 2,000 giant pandas are left in the wild. So the discovery of one of the animals is a(n)1 for celebration. Recently,a white panda was2 on a camera in a bamboo forest in Sichuan province. What3 news!

The white panda is the world's first known albino（患白化病的动物）panda. It is all white with reddish eyes. The animal, whose gender is hard to determine（确定） from the photo，is between one and two years old.

Albinism is caused by a lack of pigment（色素）in the skin，eyes and hair. It often makes it difficult for animals to4 from predators （掠食者）.

A 2017 study discovered that the giant panda's black and white coloring allowed it to blend in with the snow during winter or to hide in the shade during summer. The scientists also believe the dark circles around the eyes help the panda bears 5 each other. Fortunately, the lack of markings does not seem to have affected the albino panda thus far.

Li Sheng, a professor at Peking University,said,"The panda looked strong and his steps were steady（平稳的）,a6 that albinism may not have influenced its life."