Many people have wondered what makes the oceans rise and fall on the world's beaches twice a day.Those tides are caused by the force of the Moon's graveity(地心引力) and the rotation(自转) of the Earth.Gravity acts on the center of any solid object.The Earth is mostly molten(熔化的...
poor as it is.You may perhaps have some pleasant, thrilling,glorious hourss, even in a poor-house.The setting sun is reflected from the windows of
But according to a new study, our love for jeans may be bad for Earth. Denim (牛仔布)might be putting some sea animals in danger. Every time we wash our jeans, tiny bits of denim will flow out of our washing machines, down into the world’s rivers, lakes and oceans. You might...
Asolar eclipseoccurs whenthe moonis positioned betweenEarthand the sun and casts a shadow over Earth. They can only occur during the phase of thenew moonand make for an interesting skywatching target. In 2025 Earth will experience two solar eclipses, both will be partial solar eclipses. To ...
For the SpaceX spacecraft to reach the moon, it will need to refuel in low-Earth orbit from a space tanker, something never done before. NASA's confidence in Starship has ebbed and flowed over the past two years. During an Artemis news conference in August 2023, the space agency's Jim...
When you think of the Arctic (北极), you imagine an icy land of pure white snow. Others imagine it as the last really clean place left on earth. We have polluted the deepest oceans with plastic rubbish. "And now", CNN says, "It's the Arctic's turn."German...
away water71(bottle) or other plastic. They do not recycle their garbage. People may not know that wind72rain can move garbage from land to sea. Plastic takes a very long time to break down. It can remain in the oceans73...
和首字母,形容词natural:自然的,在句中充当定语修饰名词disaster,故答案为natural。 2、答案:prevent 解析:结合句意(我们不能阻止它们...)和首字母,动词prevent:阻止,can't是can not的缩写形式,情态动词can后面接动词原形,故答案为prevent。 3、答案:happen 解析:结合句意(...我们不知道它们...
阅读下面短文,并根据短文后的要求答题(请注意问题后的字数要求)。Scientists believe that conditions on Mars around 3.8 billion years ago were very similar to those of the early earth when primitive organisms were spreading through our oceans. At that time
英语翻译Water does around and around earth in a never ending journey called the water cycle.The sun heats up lakes,oceans and other wet places on the earth.When the water gets warm it changes into vapor.Plants also give off lots of water vapor.So