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
9
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] 【M1】
选项
答案
use→used
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3718489.html
相关试题推荐
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Whenearlyexplorerssailedroundtheworld,theyusethestarstoshow【M1
Inthelate15thcentury,ChristopherColumbus,anItaliannavigator,sailedacr
Inthelate15thcentury,ChristopherColumbus,anItaliannavigator,sailedacr
Thereseemedlittlehopethattheexplorers,______intherainforest,wouldfin
______,explorerscouldneverhavefoundthecave.A、Butforthefissurehadbeen
Theexplorersweretrudgingacrossafrozenwaterwaywhensuddenlytheicebegan
随机试题
Accordingtothenewsitem,whenwasJamesmurdered?[originaltext]Mostof
[originaltext]ThefirstautomobileraceinhistorytookplaceinChicagoin
神经衰弱有哪些临床表现?如何治疗神经衰弱?
毛泽东思想的精髓是()A.实事求是 B.独立自主 C.争取外援
财务报表按照编报期间的不同,可以分为( )。A.中期财务报表和年度财务报表 B
“电视儿童”对学前儿童的人格发展产生了不利的影响。
A.国务院药品监督管理部门 B.卫生行政部门 C.省、自治区、直辖市药品监督
下列关于平静呼吸的叙述,错误的是A.吸气时膈肌收缩 B.呼气时胸廓自然回位
在操作风险关键指标中,交易结果和财务核算结果间的差异属于流程风险指标类。监控这一
随着人们对环境保护的日益重视,北京市采取了很多措施改善空气质量,并对环境质量持续
最新回复
(
0
)