in a beautiful hot-air balloon (热气球) is cool. But have you thought about what makes it work? It’s helium (氦气... important uses, too. Hospitals use helium in magnetic resonance imaging machines (核磁共振成像机器) to see inside ……

balloon is cool, but have you ever wondered what makes it possible? It’s all thanks to helium (氦... the BBC.Helium is a gas you can’t see, smell, or taste. It’s not toxic and it’s lighter than air ……

The world is short of heliumThe world is short of helium世界上的氦气有点不够用了！世界上的氦气有点不够用了！Flying in a beautiful hot air balloon is cool. But have you ever wondered what makes it possible? It’s helium ……

TRAVEL into space in a balloon. Enjoy grand views of the Earth and sun before returning to solid... balloon filled with helium (氦) gas will carry them about 40 km above the Earth’s surface ……

两位英国冒险家乘坐气球挑战飞行新高度。HAVE you ever imagined flying to the edge of space in a giant (巨大的) balloon? Two..., they will break the world record for the highest mannedA short flightWearing Russian space suits that have ……

being tied to a helium (氦气) balloon. The burger made it to an altitude of 100,000 feet (30... before. A hamburger was sent into space this week after a group of five friends from Harvard University ……

in space.D. It can be found in space.  5. How can we solve the helium problem according.... What is the problem with helium?1. What is the problem with helium?A. It is bad for our health ……

An illustration of the passenger’s cabin under Space Perspective’s giant balloon space perspective... Space completed the first test flight of its balloon in December 2022. This marked another company ……

with helium?1. What is the problem with helium?A. It is bad for our health.A. It is bad for our... question can Paragraph 3 answer?A. What we use helium for.A. What we use helium for.B. Why we have less ……

helium balloon ever built. Made of composite graphite Kevlar rods and specially strengthened... a little helium, which wouldn't have any real effect," he said.If all goes according to plan, the balloon ……

!---------------------------------------How far does the balloon travel?The helium balloon travels about...我的气球居然飘洋过海到了中国! Alice, 4, flies ahelium balloon(氢气球) from her school in England. After more than ……

tied to a helium balloon (氦气气球). The burger made it to an altitude of almost 100,000 feet (30.... A hamburger was sent into space this week after a group of five friends from Harvard University decided ……

Can you see a skateboard3, a fork, a balloon, a bell and a ruler? ……

Spanish students managed to send a weather balloon into the edge of space. Taking atmospheric readings.... To send our handmade craft (飞行器) to the edge of space is incredible.""The balloon we chose was filled ……

under the balloon!He is Tom Morgan. Morgan is from England. He loves doing crazy things. This time, he ties a chair to 100 helium (氢气) balloons. Then, he sits on the chair. These balloons are very big ……