Dad turns on the burner (燃烧器). A fire comes out. It heats (加热) the air inside the balloon. Soon the balloon slowly goes up. Dad, my sister and I quickly climb into the basket. Then it carries us up, up and away! We are up higher than the trees. But I am not afraid. ...
These balloons can fly very high up in the sky. They are big enough to carry people. They are called hot-air balloons. To make a hot-air balloon go up, turn on the burner (燃烧器). That will make the air inside the balloon hotter. Then the balloon will go up. To make the ...
A hot air balloon is a type of aircraft that operates by heating the air inside the balloon with fire. Hot air weighs less than cold air which means that hot air will rise or float when there is cold air around. The greater the difference between the hot and cold air, the stronger ...
A. they are very beautiful B. the hot air inside the balloon is more dense than the surrounding air C. the hot air inside the balloon is less dense than the surrounding air D. they are very large 相关知识点: 试题来源: 解析 C。解析:热气球能在空中上升是因为气球内的热空气比周围的空气...
I am sure that you are asking ‘How does a rocket fly?’ If you want to know, get a balloon and then blow it up, until it is quite big.Do not tie up the neck of the balloon, let it go.The balloon will fly off through the air very quickly.The air inside the balloon tries to...
becomes lighter as it is warmed.This causes theballoon to rise.As the air inside the balloon cools,the balloon floatsback down to the ground.11.A.aboveB.exceptC.belowD.in12.A.generateB.brushC.hugD.surpriseRiding in a hot-air balloon is quiet __for the noise made by the gas burner....
解析 当热气球内部的空气被加热时,热气球会上升。 问题是:当热气球内部的空气___时,热气球会发生什么? 参考答案是:is heated 将参考答案填入句子中:What will happen to the hot air balloon when the air inside is heated up? 句子完整,语义通顺,语法正确。反馈 收藏 ...
()39.-What will happen to the hot air balloon when the air inside it heats up?-It will the air. A. rise into B. get off C. give away 相关知识点: 试题来源: 解析 【答案】A【核心短语/词汇】heat up:加热【翻译】--当里面的空气加热时,热气球会发生什么? --它会升入空中。【解析】A....
( )29. —What will happen to the hot air balloon when the air inside it heats up?—It will___the air. A. get off B. take up C. rise into 相关知识点: 试题来源: 解析 当热气球内部的空气被加热后,热气球会上升到空中。所以答案是C. 1. 题目问的是当热气球内部的空气被加热后会发生什...
( )39. -What will happen to the hot air balloon when the air inside it heats up?-It will the air.rise into B. get off C. give away 相关知识点: 试题来源: 解析 【答案】A【核心短语/词汇】rise into:上升到【翻译】--当里面的空气变热时,热气球会发生什么? --它会上升到空气中。【解析...