A. guessing B. accidental discovery C. a series of careful observations and experiments D. reading books 相关知识点: 试题来源: 解析 C。原因:文中提到 Sir Isaac Newton discovered this law through a series of careful observations and experiments.反馈...
The discovery of gravity helped us learn about the laws of motion on the Earth and in space. It led to the development of transportation and our understanding of the universe. X-rays allowed us to see the inside of the human body safely and led to the invention of more advanced body ...
Let it be said by our children' s children that when we were tested we refused to let this journey end, that we did not turn back nor did we falter; and with eyes fixed on the horizon and God' s grace upon us, we carried forth that great gift of freedom and delivered it safely ...
(1)当表示“次”的time前有“the+first/next/last”或“each,every”等时,意为“第一次/下次/上次/每次……”。 (2)the+moment/minute/instant/second意为“一……就……”。 (3)the+day/night/week/month/season/spring/year等,意为“在……的那天/那个晚上/那周/那个月/那个季节/那年春天/那年”等...
I'd never forgotten this issue of why things seem to unfold in one direction when the laws that Newton first found, and then Einstein found, and more recent laws of particle physics all suggest that you can run things in either direction of time and it should look the same. As I said...
O first and last 12. According to paragraph 6, large batches of clay writing tablets were stored because the tablets O were being produced quickly and in large quantities O did not serve any practical purpose for most Mesopotamians O contained information that needed to be available for future...
We were in a high-class neighborhood. We lived in a small, expensive apartment building at the edge of our county. Mom chose to move there because she knew the schools were good. I realized for the first time that we didn't belong there. ...
With its mentions of the Nazi rocket programs and the Weimar Republic, it’s easy to sense the influence of Gravity’s Rainbow in Another Present Era. Like Pynchon, Perry works on a maximalist scale when it comes to history. And she takes advantage of her futuristic setting to play with ...
Scientists have discovered the first Earth-sized planet. It was first marked by scientists’ using NASA’s Kepler telescope(望远镜), so it’s called Kepler-186f. It lies about 500 light years from Earth and goes around its star. The planet is the right distance from its star for water: ...
The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years. Environmental protection 9 around the world, such as WildAid and the WWF, are teaching the public about “finning”. They have even asked governments to develop laws to stop the sale of ...