首页
登录
职称英语
When early explorers sailed round the world, they use the stars to show【M1
When early explorers sailed round the world, they use the stars to show【M1
游客
2024-08-13
5
管理
问题
When early explorers sailed round the world, they use the stars to show【M1】________
them their position.Now drivers can use satellite navigation systems,【M2】________
satnavs for short, to tell them their route in exact the same way.The【M3】________
only difference is that satnavs use artificial stars-satellites.
There are more then 20 satellites in the Global Positioning System【M4】________
(GPS) .The GPS satellites are about 20, 000 kilometers on the Earth.【M5】________
They have atomic clocks which tell the time to an accurate of one second【M6】________
in 300,000 years.
The satnav compares the positions three or four satellites and works【M7】________
out exactly where it is.It does this several times by a second and is usually【M8】________
accurate to 20 meters anywhere in the world.But the satnav user need to【M9】________
give it accurate informations.Drivers sometimes get lost and end up in the【M10】________
wrong street, the wrong town, or even the wrong country. [br] 【M9】
选项
答案
need→needs
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3718497.html
相关试题推荐
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Inthelate15thcentury,ChristopherColumbus,anItaliannavigator,sailedacr
Thereseemedlittlehopethattheexplorers,______intherainforest,wouldfin
______,explorerscouldneverhavefoundthecave.A、Butforthefissurehadbeen
随机试题
[originaltext]W:Hello,OldEnglandRestaurant.CanIhelpyou?M:Yes.I’dlik
OneofAmerica’smostimportant【B1】______ishermodernmusic.Americanpopu
[originaltext]M:TheuniversityisgoingtoholdanEnglishSpeechContest.Man
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwith
A.清蛋白 B.α球蛋白 C.α球蛋白 D.γ球蛋白 E.β球蛋白人体血
下列哪项不属于合唱队员的招收主要途径()A.利用音乐课来挑选。 B.选秀
2003-128.功能止呕,可治胃热呕吐的药物有 A.天花粉B.芦根C.竹
根据《水利水电建设验收技术鉴定导则》SL670-2015,蓄水安全鉴定工作程
33岁女性,G0P0,平时月经规则,半年前体检发现有小肌瘤。现停经8周,出现下腹
在事件风险量的区域图中,若某事件经过风险评估,处于风险区A,则应采取措施降低其
最新回复
(
0
)