根据“Scientists think that it might have arrived in the form of ice by an asteroid(小行星) from outer space that hit our planet.”可知,地球上的水可能来自一个撞击地球的小行星。故选B。【小题3】词句猜测题。A:检查;B:筹集,提高(水平、数量等);C:改善,提高;D
1. 用括号内所给单词的适当形式填空1. How many ___ (planet) are there in the solar system(太阳系)?2. We
How many planets are in the universe? For those of you who like to see gigantic numbers written out in full,around 10,000,000,000,000,000,000,000,000 planetsin our observable Universe, and that's only counting planets that are orbiting stars. What are the 3 main galaxies? What Kinds ...
“We are all accountable for our actions,” Niall adds. “Thankfully many of the actions that reduce our impact on the planet are also very good for our health. We should walk or cycle, instead of driving whenever possible; we should eat less meat and more fruit and veg; we should buy...
We live in a ‘throwaway culture‘, where many of our things aren’t built to last. Each year, every house in the UK produces about1 tonne of waste– that’s about the same weight as agreat white shark! What’s worse, is that60%of what we throw away, is actuallyrecyclable! That’...
12. How can we show our care ou planet? 相关知识点: 试题来源: 解析 【答案】for【核心短语/词汇】show:展示;our planet:我们的星球【翻译】我们怎样才能对我们的星球表示关心?【解析】show one's care for...(对...表示关心)是固定搭配,因此这里填介词for,故答案为for。 反馈 收藏 ...
B We all know the sun is important. It makes life on our planet possible. But how does the sun do that? It's the sun's energy.Energy from the sun is called solar energy(太阳能). It太阳能电池板comes in the form of light or heat. People have used solar energy阳光for thousands of...
The sun is a star, just like the other stars we see in the evening sky. The difference is distance: The other stars we see are light-years away, while our sun lies only about eight light minutes away — many thousands of times closer. Officially, the sun is classified as a G2 ...
If you counted all the stars in the Milky Way at the rate of one per second, it would take you about 3200 years to finish counting our one galaxy’s set of stars. How many stars inmy skynow? Ok. So, let’s get real. Now we know how many stars there may be in the entire kno...
In order to generate enough power for the Zhurong rover, researchers designed its solar wings large enough to absorb more of the sun's energy. "The main power acquisition, storage and supply of the rover have met the expectations of our original design as of now. Fo...