When BBC's Planet Earth came out in 2006,the documentary series (1) was praised(praise) for its thrilling footage of wildlife from around the world.Hosted by famed naturalist David Attenborough,this project aims
第二节(共10小题;每小题1.5分,满分15分)阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。When BBC's Planet Earth came
When Earth was planet of the giant tortoisesTortoises evolved into giants on at least seven occasions and on four continents. The finding undermines the long-standing idea that tortoises become enormous only if they are stranded on remote islands. There are more than 40 species of tortoise, the...
to learn and share the most exciting discoveries, innovations and ideas shaping our world today.Subscription PlansGive a Gift Subscription Explore SciAm Latest Issue News Opinion Newsletters Podcasts Games Travel Company About Press Room FAQs Contact Us Standards & Ethics International Editions Advertise ...
Why did daylight saving time start? Benjamin Franklin takes the honor (or the blame, depending on your view of the time changes) for coming up with the idea to reset clocks in the summer months as a way to conserve energy, according to David Prerau, author of "Seize the Daylight: The...
When dinosaurs roamed the Earth 90 million years ago, the planet was much warmer, including Antarctica at the South Pole. But in a surprising twist, researchers have discovered evidence that Antarctica also supported a swampy rainforest at the time. Researchers captured a slice of the seafloor us...
Though a Full Moon only occurs during the exact moment when Earth, Moon, and Sun form a perfect alignment, to our eyes, the Moon seems Full for around three days. RELATED:20 things to see on the Moon Different names for different types of Full Moon ...
解析 D句意:当地球和火星这两个行星彼此距离最近的时候,从地球出发的宇宙飞船大约需要8 个月的时间才能到达火星。考查相互代词辨析。one another互相,用于三者及以上;some others 错误搭配;one other错误搭配;each other相互,用于两者之间。由 the two planets“这两个行星” 可知each other切合语境,故选D。
When did planetary accretion end? The terrestrial embryos grew to about 0.05 Earth masses ( M⊕) and ceased accumulating matterabout 100,000 years after the formation of the Sun; subsequent collisions and mergers between these planet-sized bodies allowed terrestrial planets to grow to their present...
When did Earth Day begin? Nelsonstarted Earth Dayafter seeing the environmental damage of an oil spill in Santa Barbara, California in 1969. Inspired by student anti-Vietnam War protests, he organized a national "teach-in" on college campuses that focused on educating the public about the envi...