题目This flying thing has no wings. It floats in the air. What is it? A. Airplane B. Helicopter C. Hot air balloon D. Rocket 相关知识点: 试题来源: 解析 C。解析:热气球没有翅膀,靠热气漂浮在空中。飞机和直升机有翅膀,火箭用于太空探索,不符合描述。
They do the same things as on Earth, but they do them differently. That is mainly because there is almost no gravity in space. In space, food floats away, and astronauts must eat and drink carefully.Sleeping is very difficult in space. Some astronauts like to float in the air, but ...
Both outdoors and in, they can embark on a poignant journey with “Voices in the Landscape,” a series of 10 stops throughout the Gardens which can also be accessed virtually from home. In this sensory experience, participants will follow along as storyteller Charlotte Blake Alston honors and ...
floats onair, and that air must therefore be the single substance of the universe. --- --Something andnothing Monism, theview that the universe essentially consists of a single substance,dominated early philosophy, and along with it came the idea that thefundamental...
Float glass is made by pouring the molten glass from a furnace into a chamber that contains a bed of molten tin. The process is sometimes call the Pilkington Process. The atmosphere inside the chamber is carefully controlled. The glass floats on the tin and forms itself in the shape of the...
On Earth, we put food on a plate and water in a glass. Gravity holds the food down and keeps the water in the glass. But in space, food floats away, and astronauts must eat and drink carefully.Sleeping is very difficult in space. Some astronauts like to float in the air, but most...
Without gravity, you will float (漂浮) in the air. Nobody would want to live for a long time in a space city where 4 floats around. The space city is like a huge wheel, a tube (管子) more than 150 metres in diameter (直径), and formed into a ring. The wheel turns around ...
In the water, as on the land, food chains begin with green plants. Some of the plants are tiny—you’d need a microscope to see them. Some are bigger. 在水里,就像在陆地上一样,食物链以绿色植物开始。有些植物是微小的,你需要用显微镜...
We couldn't wait to rush in. First, we came to the artificial lake. Take out a few sheets of paper, fold them into a beautiful small paper boat, put it in the lake and let it drift away slowly with the wind. We also compete to see whose little paper boat floats farthest. We ...
Although a half-helium balloon floats better than a completely air-filled balloon, it will also deflate faster, based on principles governed by Graham's law, which holds that the rate at which gas escapes from a container is directly related to the molecular weight of the gas. Because helium...