XICHANG, Sept. 19 -- China on Wednesday evening successfully sent twin BeiDou-3 navigation satellites into space on a single carrier rocket.
The Long March-3B carrier rocket lifted off from the Xichang Satellite Launch Center at 10:07 p.m. It was the 285th mission of the Long March rocket series.
The twin satellites are the 37th and 38th editions of the BeiDou navigation system. After a series of tests and evaluations, they will work together with 12 BeiDou-3 satellites already in orbit.
The twin satellites will provide danger alerts and navigation services for global users. A basic system with 18 orbiting BeiDou-3 satellites will be in place by the end of the year, which will serve countries participating in the Belt and Road Initiative.
The satellites and the rocket for Wednesday's launch were developed by the China Academy of Space Technology and the China Academy of Launch Vehicle Technology, respectively.
Named after the Chinese term for the Big Dipper, the BeiDou system started serving China in 2000 and the Asia-Pacific region in 2017.
2014年职称英语考试卫生类A级完型填空模拟练习题(19)
2015年职称英语考试卫生类A级完形填空(1)
2015年职称英语(卫生类)教材完形填空文章练习(13)
2014年职称英语考试卫生类A级完型填空练习题(12)
2014年职称英语考试卫生类A级完型填空模拟练习题(14)
2014职称英语卫生类完型填空训练(十)
2015年职称英语考试卫生类A级完形填空(3)
2014年职称英语考试完型填空习题(2)
2014年职称英语考试卫生类A级完型填空模拟练习题(13)
2014年职称英语考试卫生类A级完型填空模拟练习题(15)
卫生类英语完形填空(十二)
2014职称英语卫生类完型填空训练(九)
2014年职称英语卫生类完型填空练习七
2014年职称英语考试卫生类A级完型填空练习题(11)
卫生类英语完形填空(十三)
2015年职称英语(卫生类)教材完形填空文章练习(11)
2014年职称英语卫生类完型填空练习八
2014职称英语卫生类完型填空训练(七)
2014年职称英语考试卫生类A级完型填空模拟练习题(17)
2014年职称英语卫生类完型填空练习十二
2014职称英语卫生类完型填空训练(十一)
2014年职称英语卫生类完型填空练习五
2015年职称英语(卫生类)教材完形填空文章练习(3)
2014职称英语卫生类完型填空训练(八)
2015年职称英语(卫生类)教材完形填空文章练习(9)
2015年职称英语(卫生类)教材完形填空文章练习(16)
2015年职称英语(卫生类)教材完形填空文章练习(4)
2014年职称英语考试卫生类A级完型填空模拟练习题(20)
2015年职称英语(卫生类)教材完形填空文章练习(19)
2014年职称英语考试综合类完形填空练习题(1)
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |