As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success.

Scientists have found out that the radiation (辐射) is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health.

The harm of the radiation won’t be found until their children even grandchildren are born. Some special medicine may work a little, but no really effective medicine has been found so far.

Space rubbish is also thought to be a great danger to spacemen. It’s reported that there were 9,000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space rubbish. An explosion (爆炸) in space in 1999 made a cloud of 300, 000 fragment (碎片), each at least 4mm in size. A small piece of these even knocked a spaceship window and caused some damage (损坏).

Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. Although space is really dangerous, it interests many people on the earth.

We may even choose to leave the earth and live in space in a few years. So we should do something to help improve the space environment.

In many English homes, people eat four meals a day. Breakfast is a very big meal. They have breakfast at any time from seven to nine in the morning. They eat porridge (粥), eggs or bread and drink tea or coffee for breakfast. They have lunch at one o’clock. Lunch is a quick meal for many people. They eat all kinds of salad (沙拉) and sandwiches for lunch.

Afternoon tea is from four to five in the afternoon. Some people have afternoon tea with sandwiches, cakes and a cup of tea. Dinner is at about half past seven. First, they have soup, and then they have meat or fish with vegetables. After that, they eat some fruit, like bananas, apples and oranges. But not all English people eat like that. Some of them have their dinner in the middle of the day. So their meals are breakfast, dinner, afternoon tea and supper.

The Englishmen often eat take-away food. They buy it at a shop or a restaurant and eat it at home, because they are busy with their work.

We often think the Arctic(北极) only has snow and ice. But in fact, it has far more than that!

The Arctic is on top of Earth. The Arctic Ocean makes up two-thirds of the Arctic, while one-third is made up of land in eight countries, including Russia, Canada, and the US.

The Arctic lands have many various lives. Some plants and animals can grow in very cold temperatures. In fact, the Arctic is home to more than 21,000 kinds of lives. There are whales. Arctic foxes and many more The polar bear(北极熊)is the most famous Arctic animal.

You might think that the Arctic is too cold for people to live in. But surprisingly, there are about 4 million people living there. That’s the same population as the city of Taiyuan in Shanxi. China. About 10 percent are local people. They have been there for thousands of years. They make living by fishing. hunting(打猎)and so on.

A group of scientists recently came back from a one-year-long study in the Arctic. They have bad news: the Arctic is dying. The amount of Arctic sea ice is falling by around 3 percent every year. There will be no more ice during the summer in the near future. What does this mean for us? Many animals, such as polar bears, hunt for their food on the ice. If they can’t do this anymore, they will die of hunger. Local people hunt animals for food. But since so many animals are dying, they need to change their way of life.