Sunspots are dark regions on the Sun that are about the size of Earth. They are caused by strong magnetic fields that emerge through the photosphere, or surface, of the Sun. The spots themselves don’t exactly
例3 The sun,gives us light and heat, is a star. A.which B.that C. where D.what 相关知识点: 试题来源: 解析 分析:此处考查的是非限制性定语从句,非限制性定语从句与其先行词之间一般用逗 号隔开,只是对先行词作附加或补充性的说明,不起限制作用,如果去掉,主句的意思仍然清 楚完整。 答案:A ...
如果太阳失去了热将会发生什么？
1英语翻译What a fine day!The sun is shining .Can youfeel the heat when you stand in the sun?The sun gives us light.It keeps us warm.It makes plants grow.People,animals and plants can't live withcot the sun.The sun looks small because it is so far from us,but it's really very...
WHY IS THE SUN IMPORTANT? The sun is a huge (巨大的), hot, bright star. It is important because without it there would be no life on Earth. The sun gives us light and heat(热). All living things need light and heat from the sun to live. Plants need light and heat to grow. Th...
What happens is that a certain amount of heat energy is required to convert liquid water into vapor. 所发生的事情是,需要一定量的热能去把液态水转换为蒸汽。 So when water evaporates from the ocean, it takes energy to convert that water into a gaseous form, into water vapor. ...
A. undoubtedly B. in addition C. by accident D. at present 相关知识点: 试题来源: 解析 A。“undoubtedly”插入语表示毫无疑问,太阳毫无疑问是光和热的来源。“in addition”此外;“by accident”偶然;“at present”目前。只有“undoubtedly”符合语境。反馈 收藏 ...
What causes releases of energy from the sun and stars ? 01:21 Hydrogen gas which is easily available on the earth is going to be the... 02:23 A solar panel containing 1500 solar cells each of surface area 5 cm ar... 04:51 How much energy will 1 kg mass of wood yield on complet...
It isn’t the sun’s outer layer, or corona, that melts these comets as they graze its edge. The corona, though very hot, is too thin to transfer much heat. Instead, the intense glare of solar radiation sublimates ices into gas that escapes into space or causes the comets to crack ...
What causes the greenhouse effect? The Greenhouse Effect: The greenhouse effect occurs when heat is trapped in the atmosphere of a planet, increasing the global temperature. The greenhouse effect is named after greenhouses, which use glass to trap heat from the Sun making the inside of the gree...