根据第二段第一句“Thereisalmostnogravityinspace, soastronautsdonothavetosleeponthebedorthefloor.(太空中几乎没有重力,所以宇航员不必睡在床上或地板上。)”可知,宇航员在太空做很多事情很困难的原因是太空中几乎没有重力,故选D。57.【答案】B【解析】题干的意思是:宇航员为什么在太空中使用勺子?A.把果汁倒...
People would have to wear special boots to prevent themselves from floating_ into space 6. 食物最有可能是药丸的形式,而且并不是那么可口。 Food would most probably be in the form of pills ___ and would not be so tasty 7. 火星上的重力只有地球重力的八分之三。 The gravity on Mars i...
Nij: And then a really huge molten rocksmashed into Earth. Nij: And then a little chunk of that moltenrock flew out into space to make the moon. Bri: Our moon used to be part of the earth? Nij: Yes. So the earth was just out there,floating in space around the sun. ...
Just then he noticed something floating in the water.It was the prettiest star he had ever seen. Just a baby star.It must have fallen from the sky. 就在这时,他发现水面上漂着一样东西,一颗他见过的最美的星星。一颗星宝宝。它一定是...
According to paragraph 1, how do scientists know that Callisto is made up largely of ice? A. A sample of its interior was taken by the Galileo spacecraft in the late 1990s. B. It has too low a density to contain much rocky metallic material. C. With a noontime surface temperature of...
But it's not good to be floating away somewhere while sleeping. So astronauts use small sleeping compartments(隔间) and sleeping bags.Is it interesting to live in space? Maybe we can travel into outer space and experience the unusual and exciting life there in the near future!()35. What ...
Do you know how they eat, sleep and bathe in space? Next we will tell you some useful information.How do the astronauts eat in space?Like people on the Earth, the astronauts also have three meals every day. Their food is stored in some special locker trays. They can help stop the ...
you have to follow your teachers instructions. At home at school when you cant run out to the toilet, or squat under the corner, it is best to hide in a narrow space, the most triangular area. Remember, wherever you run, keep your hands on your head, the latter using other soft obje...
Astronauts poop just like everybody else. However, going to the bathroom while floating in space can be tricky. Gravity is very weak in space, meaning toilets cannot flush the same way that they do on Earth. In a ...
The International Space Station (seen here in 2018) has been continuously occupied by astronauts since 2000. NASA Imagine you wake up in the morning, look out your window and see the vast blue horizon of Earth and the blackness of space. Our world stretches out beneath you. Mountains, lake...