We see the sun every day. If it is
Light
Light from the sun arrives in the earth in about 8.5
相似题推荐
I hope everything is going well. I have something very special to tell you. Last week I went into space for the first time!
My parents visited space last year, but I was too young to go with them. Anyway, a month ago, I had my birthday party. It was very exciting when I opened my p
Two weeks after my birthday, I had to go on a short training course. It was quite difficult, and I had to study very hard. L
Finally, the day arrived, and my parents took me to the a
I admit that for a few seconds I felt a little nervous when I sat in the space shuttle. However, when we l
My first space flight only lasted fifteen minutes, but I will never forget it. I a
Yours
Mark
【推荐2】Scientists think that there has been life on the earth for millions
Scientists has launched many spaceships to explore other planets in the solar system.Some spaceships have gone beyond the solar system. However, no one has discovered any life in space
Why has no one from other planets sent us a message? Have they tried
one,flew,planet,time,far,that,first,million,winter,size |
According to our guidebook,Uranus(天王星)was the first
Summer on Uranus lasts for 42 years.During this time it is
A Chinese knot(中国结)is a knot that is woven(编织)from a single rope to be different
Chinese knots have
Even today, Chinese knots hold their value and carry different information. For example, the “double happiness knot” is given and used at weddings(婚礼)
It’s surely a good choice for tourists to buy Chinese knots as gifts for their friends during their trips.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712429687816192/2717968077979648/STEM/a812daf93a074750ae060e528e33997d.png?resizew=139)
Tourism has become a huge industry. Tourists make millions of foreign trips a year, twice as m
It’s true that tourism has brought benefits to many areas of the world that were very poor. However, mass tourism also has some bad e
Complaints from local people are growing. In cities such as Barcelona or Venice residents say that too many tourists arrive on cruise ships(游抡). As a result, town centres are overcrowded. They tell stories about n
Of course, many tourists enjoy the benefits of tourism in a responsible way. They choose holidays that support the local economy and they respect the local culture and the environment. Environmentally friendly tourism, or eco-tourism, is becoming more p
Responsible tourist behaviour is necessary, but it isn't enough to solve the problem. Many people now believe that governments should control how many visitors enter their country. They believe they should l
U
【推荐3】The undersea world is very beautiful. Now more and more people want to dive (潜水) in the water to find the secrets there. Scuba diving is a new sport today. It can take you into a
You will find many strange animals in the sea. Some are as large
During the day, there is enough light. Here, under the sea, everything is blue and green. When fish swim nearby, you can
The deep sea is not an easy place to live in. It’s cold, and it’s dark, too. The deeper it is, the
Besides the cold and darkness, deep-sea animals face a
Animals eat! They must find food to eat. Some animals eat