This video provides an entertaining look at some of the ideas people have about the zero-gravity environment on board an orbiting spacecraft, and shows why the astronauts actually appear weightless. But let’s discuss it, too: When asked why objects and astronauts in spacecraft appear weightless...
3【题文】Astronauts in a spaceship have to ___weightless conditions ___are quite different from ___are on the earth.A.do with; which; thoseB.deal with; that; thatC.solve; that; whatD.face; which; these 4Astronauts in a spaceship have to ___weightless conditions ___are quite ...
pull of gravity. But if things are far away from each other, the pull of gravity is weaker. That's why astronauts feel weightless in space because the force of gravity there is much smaller.Gravity is really important in our everyday lives. It makes things fall down when we drop them ...
Before astronauts can go to space, they train like this for at least three and a half years. One of the hardest parts of the training for astronauts is the underwater training. This helps them get ready for the weightless environment in space. Huang explained that astronauts wear diving ...
At least two hours each day is spent on exercise. It is necessary to keep the crew healthy. In some ways, living in a space station is like being on a deserted island. A crew of two or three astronauts has to survive far from home for weeks or months. If thei...
In space, they get to do some pretty amazing things, like floating(漂浮) in zero gravity(重力). However, there are also plenty of things that astronauts can’t do because of their weightless environment, and that’s very sad. What’s worse, they can’t even let their sadness show, bec...
解析 C。解析:“Food has to be specially prepared and packaged to fit the needs of space travel. Portions are usually smaller and designed to be easy to consume in a weightless environment.”,说明宇航员不能吃正常大小的饭菜是因为在太空吃东西很困难。
A 试题分析：考查固定词组。固定词组be accustomed to…习惯…适应…；句意：两个月的训练以后，宇航员们已经习惯并能适应失重的环境了。故A正确。点评：固定词组be accustomed to…习惯…适应…在英语中有多个短语表示适应，习惯；如adapt…to…等在日常的学习中要把近义词，同义词进行归纳和总结。
Astronauts in a spaceship have to ___weightless conditions ___are quite different from ___are on the earth. A. do with; which; those B. deal with; that; that C. solve; that; what D. face; which; these 试题答案 在线课程 C 练习册...
Adults cannot visit Hong Kong Space Museum, can they?2. How many film shows in the space museum are mentioned(提到)?3. If a visitor wants to know how astronauts live and work in space, what activity will you suggest?I will suggest 相关知识点: 试题来源: 解析 答案LYes. they can. ...