首页
登录
职称英语
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese
游客
2023-08-19
33
管理
问题
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese children played with a fan-like toy that spun upwards and fell back to earth as rotation ceased. Leonardo da Vinci conceive the first mechanical【B1】______, called a "Helix," which could carry man straight up, but was only a design and was never tested.
The ancient-dream was finally realized in 1940 when a Russian engineer piloted a strange looking craft of steel tubing with a rotating fan【B2】______. It rose awkwardly and vertically into the air from a standing start, hovered a few feet above the ground, went 【B3】______ and backwards, and then settled back to earth. The vehicle was called a helicopter.
Imaginations were fired. Men dreamed of going to work in their own personal helicopters. People anticipated that vertical flight transports would carry millions of passengers as do the airliners of today. Such fantastic expectations were not【B4】______.
The helicopter has now become an extremely useful machine. It【B5】______ in military missions, carrying troops, guns and【B6】______ instruments where other aircraft cannot go. Corporations use them as airborne offices, many metropolitan areas use them in police work, construction and logging companies employ them in various【B7】______ ways, engineers use them for site selection and surveying, and oil companies use them as the best way to make offshore and remote work stations【B8】______ crews and supplies. Any urgent mission to a hard-to-get-to place is a likely task for a helicopter. Among their other 【B9】______ of use: deliver people across town, fly to and from airports, 【B10】______ rescue work, and aid in the search for missing or wanted persons. [br] 【B8】
选项
答案
accessible to
解析
accessible to意为“易接近的”,与前面的句子成分构成“make+宾语+补足语(a.)”的结构。
转载请注明原文地址:https://tihaiku.com/zcyy/2939166.html
相关试题推荐
Forcenturies,farmershaveusedwindmillstopumpwater,crushgrainandpe
Forcenturies,farmershaveusedwindmillstopumpwater,crushgrainandpe
Forcenturies,farmershaveusedwindmillstopumpwater,crushgrainandpe
Forcenturies,farmershaveusedwindmillstopumpwater,crushgrainandpe
文房四宝(Thefourtreasuresofchinesestudy),是中国书画的主要工具和材料,它们是笔、墨、纸、砚(inkstone
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
随机试题
Every101minutesorso,aDepartmentofDefenseimagingsatellitecirclest
Thecommitteemeetings,______alwaysdominatedbythesamepeople,______slow-m
InJanuary1986,BasitandAmjadAlvi,wroteapieceofcodetosafeguardth
[originaltext]"Whereistheuniversity?"isthequestionmanyvisitorstoCa
[originaltext]W:Goodmorning,Mr.Pitt.Dositdown.M:Thankyou.W:Firstof
人民法院有权要求当事人提供或者补充证据。人民法院有权向有关行政机关以及其他组织、公民调取证据。Apeople’scourtshallhavethea
生化汤的功用是( )。A.温经散寒,祛瘀养血 B.活血化瘀,温经止痛 C.
患者男,32岁。在游泳时因腿部痉挛,发生溺水事件,在现场倒水最简单的方法是A.抓
在对一些标的的采购中,尽管市场供应充分,但是政府对于采购对象可能仍然缺乏了解,在
质量计划是为了确保过程的有效运行和控制,在程序文件的指导下,针对特定的产品、过程
最新回复
(
0
)