Mercury has no moons but is a fully-fledged planet like Earth. All the gas planets, including Jupiter and Neptune, have rings of dust. Jupiter's and Neptune's rings are not as big as those of Saturn and Uranus.4A planet does not
根据第1大段“Many people know that rubbish is a big problem on planet Earth. What many people don't know is that junk has become a problem in outer space too.”许多人知道垃圾是地球上的一个大问题。许多人不知道的是,太空垃圾也成为了太空中的一个问题。可知,本文主要讲述的是太空垃圾,环境的...
(5)B 主旨归纳题,文章首段提到Many people know that rubbish is a big problem on planet Earth.What many people don't know is that junk has become a problem in outer space too.外太空垃圾和在地球上的垃圾一样,已经造成了严重的问题,下文也在说明如何产生和销毁这些垃圾,这是和环境相关的,故选B....
It was this mind-blowing series of improbable events that made Earth the possibly unique life-bearing planet it now is. The idea that Earth may indeed be unique could have been spawned by this famous photo taken on the Apollo 8 mission in 1968.正是这一系列令人兴奋的不可能的事件，使地球成...
This first stage produces simple molecules, which can then recombine to make more complex molecules if this astonishing experiment is successful. What we're going to do now is warm the system a little to see what the ice does.第一步产生简单的分子，如果这个惊人的实验成功的话，这些简单的分子就...
Peterson, Deb
Our planet is facing a big problem. It's called environmental pollution. What is it? Let's find out!What is Environmental Pollution?Environmental pollution is that the harmful things are put into the air, water, and soil.These things can make our planet sick and affect the life on it....
【预订】【小人物,大梦想】哈里·斯泰尔斯【LittleP MariaIsabelSanchezVegaraLizzieKnott ¥153 【预订】【T&H】火山爆发Volcano儿童科普立体书 BernardDuisit ¥67 【预订】【选择你的冒险之旅】太空及更远的星际【Choos Montgomery,R.A. 同类图书排行榜 畅销榜 1 月亮去哪儿了?Where Has the Moon Gone...
Voting matters, obviously. And participating in movements “large enough to change things” is essential, Mr. McKibben said. “Really, the most important thing an individual can do is be a little less of an individual and join ...
may sound like a new weight loss fad. And you might drop some pounds, should you try it. But that’s not the main goal; instead, reducetarianism is about cutting down on the amount of meat and processed foods you eat, making sma...