The Sun is made up of mainly ___. A. water and air B. hydrogen and helium C. soil and rocks D. gold and silver 相关知识点: 试题来源: 解析 B。中文解析:文章中提到“The Sun is made up of gas. It is mainly hydrogen and helium.”,太阳主要由气体组成,主要是氢和氦。
The sun is mainly made up of ___. A. oxygen and nitrogen B. hydrogen and helium C. carbon dioxide and water vapor D. iron and nickel 相关知识点: 试题来源: 解析 B。太阳主要由氢和氦组成。“oxygen and nitrogen”是氧气和氮气,“hydrogen and helium”是氢和氦,“carbon dioxide and water...
根据第一段中A Swiss airplane powered only by energy from the sun left from Abu Dhabi early on March 9. Its creators hope the plane will make the first around-the-world journey without any fuel. The plane is called Solar Impulse 2.(3月9日,一架仅靠太阳能供电的瑞士飞机从阿布扎比起飞。它...
A. The sun is very hot. B. There are many planets. C. The solar system is very big. D. The planets move around the sun. 相关知识点: 试题来源: 解析 D。解析:文章主要讲述行星围绕太阳转。选项 A 太阳很热不是主旨;选项 B 有很多行星不是重点;选项 C 太阳系很大不是主要内容。反馈...
试题来源: 解析 A。解析:“Make hay while the sun shines.”的意思是“趁热打铁;抓紧时机”。这里是说要趁着阳光好(好的天气、好的时机)的时候去制作干草(做事情),不是强调阳光对干草的重要性、只在晴天工作或者干草制作的过程,所以选A。反馈 收藏 ...
(b)Using its Q energy given in lecture, what is the total energy produced by the Sun from now until its end of life-when all the hydrogen fuel will disappear. (c)Knowing the Sun can still live5billion years more(5Gy:...
A Swiss airplane powered only by energy from the sun left from Abu Dhabi early on March 9. Its creators hope the plane will make the first around-the-world journey without any fuel. The plane is called Solar Impulse 2. It has one seat and is made from carbon fiber. The plane weighs ...
A sun-powered machine removes salt from ocean water so he can drink it, but when that fails he sometimes tries to collect rainwater in a bucket.He’s not bothered by any of the hardships. Eric sees the world as a laboratory where there is much to learn. And when his trip around the...
16. What is the man’s advice for the woman? A. Come back later. B. Talk to the manager. C. Postpone the meeting. 17. What will the woman probably do next? A. Tidy up a room. B. Make a phone call. C. Go for a coffee. ...
14.The distinguished enterpriseconsists(consist)of 12 departments, each of which is made upof 20 people, who graduated fromtop universities. 这家优秀的公司由12个部门组成,每个部门又由20名名校毕业生组成。 15.The president was quoted (quote)as saying that he was deeply moved by thismoving (move...