What is air? It has no colour, smell or taste. We can feel it. When it moves, it becomes wind. Air is important to the world. People need it. Animals need it. Plants need it too. So we must keep the air clean and fresh. Don't smoke. Don't drive to school or work if you...
The air 相关知识点: 试题来源: 解析 The AirAir is very important to us.We can breath and live with air.But the air in our city is dirty now.Cars,people's activities and other reasons make the air dirty.So weshouldoften go out by bus.We should drive less.We can also plant more ...
772.The future home will use integrated sensors to tell when you leave home each morning, and then go into an energy-efficient mode all by itself. 未来的住宅将使用集成传感器来感应你每天早晨何时出门,然后自动进入节能模式...
The Earth is surrounded by a blanket of air (made up of various gases) called the atmosphere. The atmosphere helps protect the Earth and allows life to exist. Without it, we would be burned by the intense heat of the sun during the day or frozen by the low temperatures at night. Any ...
Moving energy is called kinetic energy. With a pencil, try this example to know the two types of energy. Put the pencil at the edge of the desk and push it off to the floor. The moving pencil uses kinetic energy. Now, pick up the pencil and put it back on the desk. You used you...
Electric Potential (Energy) When we harness electricity to power our circuits, gizmos, and gadgets, we're really transforming energy. Electronic circuits must be able to store energy and transfer it to other forms like heat, light, or motion. The stored energy of a circuit is called electric...
【难句理解】What the plants pump through the air is a mixture of chemicals known as volatile organic compounds, VOCs for short.结构分析,这是一个主从复合句。 What the plarts pump through the aitr 是Whar引导的主语从句;known as.是过去分词短语作后置定语。__汉语大意;植物释放到空气里的是一种被...
Choose the best answer to each question.Something big is happening to the human race - something that could be called the Great Transformation.Take the energy for example. Some people worry about what will happen when the deposits of petroleu 39、m are gone, but researchers are already ...
A.Social interaction is key to understanding symbols. B.The human brain has potential yet to be developed.、 C.Ancient philosophers set good examples for debaters. D.Artificial intelligence ensures humans a bright future. D According to the Solar Energy Industry Association, the number of solar ...
And research has shown that the climate toll from raising plantbased foods is half or less of the toll caused by animal-based foods. This is largely because it takes a lot more land, water, energy, and other resources to produce a p...