首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
公务员
The first hot air balloon was made by two French brothers, Joseph and Etienne de Montgolfier. Both brothers worked in the family
The first hot air balloon was made by two French brothers, Joseph and Etienne de Montgolfier. Both brothers worked in the family
admin
2018-06-09
1
问题
The first hot air balloon was made by two French brothers, Joseph and Etienne de Montgolfier. Both brothers worked in the family business, which was paper manufacturing. The study of flight interested them, and they soon started experiments in this area.
Joseph was the first to work on hot air balloons, in 1771. He noticed that, when certain gases were burned, it caused materials to rise. Later, Etienne worked with him. At last, they practised with paper bags. They found that hydrogen gas particularly good for this purpose.
On 4 June, 1783, they produced a linen and paper balloon in the shape of a sphere about 100 meters in diameter. The balloon had an opening to receive the heated air rising from a fire of burning wool and wet straw on the ground. There were some fireproof materials inside the bag to prevent it catching fire. The balloon rose into the air to a height of 2000 meters, and stayed there for about 10 minutes. The only problem with this experiment was terrible smell from the fire of wool and straw!
Encouraged by this success, the de Montgolfier brothers made a new balloon for passengers. The brothers put a sheep, a duck and a cockerel in it to test it for safety. On 19 September, 1783, the balloon took off from the King of France’ s palace at Versailles(凡尔赛宫). The flight was a success. The animal travelled over three kilometers before landing in a forest. On 21 November of the same year, the brothers launches another balloon. This time, there were passengers on board, a scientist, Jean Pilate de Rozier, and a nobleman, the Marquis d’ Arlandes. The hot air balloon flew for 25minutes over the city of Paris before landing safely. A new means of transport was born!
What was the problem with the experiment with the first big balloon?______________________
选项
答案
A terrible smell from the fire of wool and straw.
解析
由文章第三段最后一句话“The only problem with this experiment was terrible smell from the fire of wool and straw!”可知,第一个热气球实验的唯一问题是:羊毛和稻草燃烧所引起的难闻气味。
转载请注明原文地址:https://kaotiyun.com/show/djOq777K
本试题收录于:
小学英语题库特岗教师招聘分类
0
小学英语
特岗教师招聘
相关试题推荐
Itwasthesummerof1965.DeLuca,then17,visitedPeterBuck,afamilyfriend.BuckaskedDeLucaabouthisplansforthefutur
Forthispart,youareallowed30minutestowriteATeachingArrangementonhowyouwillteachthefollowingpassage,pleasepa
Theneedforasurgicaloperation,especiallyanemergencyoperation,almostalwayscomesasasevereshocktothepatientandh
Mostpeoplewanttowork,butithasbecomemoredifficultintoday’sworldtofindworkforeveryone.Theeconomy(经济)ofthe
Imustdeclinebecausetheconditionsyouofferedarenot__________.
In1974,afterfillingoutfiftyapplications,goingthroughfourinterviews,andwinningoneoffer,ItookwhatIcouldget—at
ThefirsthotairballoonwasmadebytwoFrenchbrothers,JosephandEtiennedeMontgolfier.Bothbrothersworkedinthefamily
Theinterviewisanimportanteventinthejob-huntingprocess,becausethe20or30minutesyouspendwiththeinterviewermay
Yourfriendreallyoughttomake____________mostofthisopportunity,becauseshewon’tget____________secondchance.
随机试题
行政组织编制设计的基本原则包括()
患者男,50岁,在建筑工地干活时被一铁钉扎伤,医嘱予以破伤风肌内注射,做破伤风过敏性实验,护士操作正确的是
集资诈骗罪区别于非法集资等行为的特征是()。
甲公司董事长为李某,总经理为王某、财务总监为张某、三名独立董事为赵某、辛某、侯某。则该公司董事会在设立审计委员会时,最佳的人选是()。
临时管理规约的主要内容包括()
以下属于《水浒传》中的人物的是()。
简述教师职业道德的具体内容。
机关制发文件,应遵守事无巨细都要发文的原则。()
甲、乙两队合作一项工程,按原来的工作效率,甲队单独完成比乙队单独完成少用3天;现在甲队提高工效20%,乙队提高工效25%,这样甲队单独完成,只比乙队单独完成少用2天。如果工作效率提高后,先由乙队单独做1天,然后两队合作,还需多少天完成?
Employee的表结构为:职工号、单位号、工资,Department的表结构为:单位号、单位名称、人数,查询至少有3名职工的每个单位的职工人数和平均工资。正确的SQL命令是()。
最新回复
(
0
)