根据第二段的"Whenastronautsgoonspacewalks,theywearspacesuitstokeepthemselvessafe...Tokeeptheastronautsandthespacecraftsafe,theastronautsmustleaveandgobacktothespacecraftthrough a specialdoor.Whenon a spacewalk,astronautsusesafetytetherstostayclosetotheirspacecraft.Tethersarelikeropes,connectthespacewalkerswiththe...
What happens when you are in space? Some interesting things will make you surprised.Thanks to Earth's gravity, we take many things for granted. For example,when we cry, our _ 1_ fall down our face. When we strike a match, the flame always goes up. But these things are different in...
it is called a spacewalk. Astronauts go on spacewalks for many reasons. For example, experiments can be placed on the outside of a spacecraft. This lets scientists learn how being in space affects(影响) different things. By going on spacewalks, astronauts can also fix things instead of bri...
768.However, in the not-too-distant future, we will be living in smart homes that will lock the door for us when we are away and remember to switch off the TV when we forget. 然而在不久的将来,我们将生活在智...
connections and memorialize figures central to his life—his family members and those close to him. The artist will discuss the centrality of community and kin (亲属) to his practice. This event will take place in Sedri...
The drops of water are too small to see. They have turned into a gas called water vapour. As the water vapour goes higher in the sky, the air goes cooler. The cooler air causes the water droplets(小滴) to start to stick to things such as bits of dust, ice or se a salt.Clouds ...
Any time an astronaut gets out of a spacecraft while in space, it is called a spacewalk. Astronauts go on spacewalks for many reasons. For example experiments can be placed on the outside of a spacecraft.This lets scientists learn how being in space affects different things. By going on...
Today, only three countries have finished spacewalks independently. They are Russia, the United States and China. The first person to go on a spacewalk in the world was Alexei Leonov from Russia. Zhai Zhigang is the first Chinese astronaut to go on a spacewalk. The world record of spacewalk...
①The merchants of Arab are doing their things all of the world.(n.商人) ②He is a wholesale merchant.(n.批发商) ③This is a merchant ship of 5,000 tons.(adj.海上货运的) 2.negotiate vt.商定;达成(协议) vi.谈判;...
See…one of the most remarkable things about the Great Pyramid is how accurate the proportions are. The dimensions are almost perfect. To get that perfection, the engineers must have had to measure it repeatedly during construction. And the way you'd measure it is from the four corners of ...