The universe is very big. What is the universe made of? A. stars and planets B. gas and dust C. matter and energy D. water and air 相关知识点: 试题来源: 解析 C。宇宙是由物质和能量组成的,“matter and energy”是“物质和能量”。“stars and planets”是“星星和行星”,“gas and dus...
All of the planets are made from differentmaterials, so they all have different isotopes and theirown genetic code. No other planetary bodies have thesame genetic relationship. Only the Earth and the Moonare twins.When I started working on the origin of the Moon,there were scientists that ...
A. Planets are very large. B. Planets are all different. C. Planets are made of gas. D. Planets are very far away. 相关知识点: 试题来源: 解析 B。文章关于行星,选项 B 说行星各不相同,符合说明文对不同行星特点的介绍;选项 A 说行星很大,太片面;选项 C 说行星由气体组成,不准确;选项 D 说...
B. Big Red Lollipop is the best- selling book of last month. C. Kevie doesn't want to have a little sister or brother. D. The writers of the four books are mainly women. B I believe that we can have an important effect(影响) on anyone we meet. The right words at just the righ...
Galileo’s telescope made ___ ___ for people to see the sky more clearly, and to find the positions of the stars and planets. 重点短语(Unit5What are the shirts made of?)同步练习参考答案 Ⅰ.1.C解析:句意为“张国立以他的表演而闻名;作为一名优秀的演员而被人所知”,故选C项。 2. A解析...
So could it be that Earth really is unique? All living things on Earth are made of the same building blocks, long carbon-based molecules.所以地球真的是独一无二的吗？地球上所有的生物都有着相同的组成成分，即长碳基分子。Scientists now think that a large proportion of these molecules came from...
” Looking up at the stars, people have always wanted to learn more about space, and scientists work hard to find answers. They make vehicles to carry brave people into space to find out the secrets of the universe.They also real...
C. Cumulus clouds are middle clouds. D. Clouds get their names in two ways. E. The drops of water are too small to see. F. However, other planets have clouds that are not made of water. G. Studying clouds helps scientists better understand Earth’s weather.相关知识点: 试题...
In particular, the C/O ratio is proposed to be a key determinant of the composition of solids that condense from disk gas and are incorporated into planets. Also, planets may leave chemical signatures on the photospheres of their host stars by sequestering heavy elements, or by being accreted...
At Learny Land, we love to play, and we believe that games must form part of the educational and growth stage of all children; because to play is to discover, explore, learn and have fun. Our educational games help children learn about the world around them and are designed with love. ...