8 , it has lots of cameras instead. The cameras keep Rover from getting into crashing into things. The robot took pictures for scientists back on the earth. Some schools have robot contests(比赛). Students make 9 own robots. The students 10 to make the best robot. The winner gets a pri...
Generally speaking,kids are curious about the world around them.For instance,they want to know how their hearts beat.They want to know why the ocean water tastes salty.As children grow up,they become curious about different kinds of things.When they are babies,they are interested in the ...
for fear that C. as if D. even though 免费查看参考答案及解析 题目: Scientists study the ocean in many different ways. Although many marine(海洋的) scientists focus on animals in the ocean, others seek to gain a better understanding of the ocean’s chemical and physical components (组成...
In the study, scientists from the University of Birmingham have discovered that a small group of cells (细胞) within the plant embryo (胚胎), work in a similar way to the human brain. This group of cells work as a “brain” for plant embryos which can change their behaviors according to...
Like all great scientists, take the chance to play around and experiment. Ice lenses Does it seem strange to make a lens out of (liquid) water? Would you be so surprised if the lens were made from (solid) ice? Think for a moment and you'll see there's no real difference. Next ...
You have 20 kids doingdifferentthings. 2019年6月四级真题(第三套)阅读 Section B Yet they are doing it quitedifferently. 出自-2017年6月阅读原文 The scientists tracked white storks fromdifferentcolonies in Europe and Africa. 出自-2017年6月阅读原文 ...
Now scientists don’t know why people use one sense more than the others. Maybe the sense they use most just works best for them. Item two Today, we tell about one of the most famous national parks in the United States. It is one of the most beautiful places in the country. Yosemite...
I worked hard to go on vocal training.And my voice slowly became better several years later.I could take part in all kinds of activities including musical matches and public speaking.And I got lots of achievements.My voice plays an importan...
There are many different kinds of jobs for people to do in the world. Now there is a special job. Who does the special job? The workers are not men but dogs. These dogs are like the eyes of special people. Who are the special people? They can’t see with their eyes. So we call...
The Silk Road is the name of different roads that long ago connected Europe, Africa and Asia. People reached these different places along these roads. Scientists believe people began to travel the Silk Road about 3000 years ago. By the time the Chinese silk trade became important in the ...