题目7. Many objects in the universe are invisible(visible), but they send radio waves. 相关知识点: 试题来源: 解析 答案见上8.invisible[提示:句意:宇宙中的许多物体是看不见 的,但它们发射无线电波。 invisible udj.看不 见的。 反馈 收藏
根据文中的信息 This is extremely useful, because there are objects that can't be seen, objects that we wouldn't even know without radio telescopes. 可推知,在无线天文望远镜的帮助下,我们发现了宇宙中一些未知的物体,故答案选 C 。 分析总结。 可知是为了避免干扰保持望远镜的灵敏度无线天文电望远镜建...
aPart of it is that many of these countries are invisible places, neglected by us politically, neglected by our business firms, by international markets, and by trade. 一部分的是许多这些国家是无形的地方,政治上忽略由我们,忽略由我们的商号,由国际市场和由贸易。[translate]...
有些人说distant 指一般的在远处,可以看到但不一定看得清.而remote 指距离遥远,看不见的,比如说某一个地方偏远.但也有例句是many distant stars are invisible to the naked eye .请问distant和remote到底有什么区别? 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 remote和distant通常...
aCracks and volumetric defects can reflect ultrasonic waves quite differently. Many cracks are "invisible" from one direction and strong reflectors from another. 镇压和容量瑕疵可能相当不同地反射超声波。 许多镇压从一个方向和强的反射器是“无形的”从另。 [translate] ...
Many objects in the universe are invisible, but they send radio waves. The radio telescope thus appeared, and it is considered one of the greatest inventions in the twentieth century. A radio telescope is usually made up of: One or more antennas to collect the radio waves. Most antennas are...
C Many objects in the universe are invisible'. but they send radio waves. The radio telescope' thus appeared.and it is considered one of the greatest inventions in the twentieth century. Reber built the world's first radio tele-scope in 1937. Ryle and Hewish developed radio telescope systems...
阅读理解. For many in the United States,Arab-Americans are an invisible part of the population.Though Arab-Americans as a community have made great contributions to American society in fields from literature to politics to medicine,many Americans know
How many objects are in the Oort cloud? What did the Hubble Space Telescope discover in 1990? Is the Hubble Telescope in interstellar space? What frequency is the Hubble Telescope? Can the Hubble Telescope find planets? What kind of spectra does a Hubble Telescope have?
How many things can you see in the night sky? A lot! On a clear night you might see the Moon, some planets, and thousands of sparkling stars.You can see even more with a telescope．And with bigger and bigger telescopes you can see more and more objects in the sky．And ...