astronauts:They must (3) ___ themselves to something before they sleep They must keep everything clean, so dirt doesn't (4) ___ the space station, and they must put their (5) ___ in special bags They cannot spend too long in space because it is bad for their (6) ___.They d...
51 Everyday tasks are less simple mainly because of the zero gravity in space. 2 It's important for astronauts to exercise regularly because with no gravity to push against, astronauts' bones and muscles can become weak in space. Exercising regularly can help them stay fit. 3 The answer may...
—The gravity(引力) in the space station is about 90% of on the Earth.( ) A. it B. this C. that 相关知识点: 试题来源: 解析 C it它,代替前面提到的名词,指同一物;this这、这个,指离自己近的事物;that那、那个,代替前面提到的单数名词或不可数名词,指代同一类物。此空是指地球的重力和空间...
The environment in the ISS is different from that on the earth. There is no gravity(重力), so people can carry heavy things easily. They can also float(漂浮) anywhere they want. The space station helps humans a lot. It helps watch changes on the earth like earthquakes. With the help...
Einstein's famous theory, which he published in 1915, is widely considered to be the best way of explaining gravity. It essentially says that massive objects cause the fabric of space and time to curve, which causes other objects to fall towards them. ...
Banik also pointed out how Einstein’s model of gravity always involved the presence of ‘dark matter’. “Such a high speed requires 60 times the mass we see in the stars of the Milky Way and Andromeda. However, the friction between their huge halos of dark matter would result in them ...
In a documentary about space exploration, “The astronauts conduct experiments in zero gravity.” The word “conduct” can be replaced by ___. A. do B. make C. have D. take 相关知识点: 试题来源: 解析 A。本题考查“conduct”的同义词。“conduct experiments”进行实验,“do experiments”也有...
Although much is known about observable effects produced by gravity, e.g., spacecraft orbits and elaborate simulations using general relativity and cosmological models are available, several aspects remain obscure. Laboratory measurements of gravity are difficult due to its weakness on these length ...
But in a spacecraft this is not the case. Here there is no gravity which is why we so often see pictures of astronauts floating around. This means that strangely when you cry your tears have nowhere to go. As a result they just stick to your eyes....
1 Terms About Outer Space有关宇宙的名词术语 universe 宇宙 orbit 轨道 earth 地球 moon 月亮 sun 太阳 star 星星 planet 行星 satellite 卫星 gravity 重力 spaceship 宇宙飞船 Venus 金星 Jupiter 木星 Mercury 水星 Mars 火星 Saturn 土星 Uranus 天王星 Neptune 海王星 Pluto 冥王星 outer/deep space 外太空 Mil...