Beidou began providing positioning, navigation, timing and messaging services to civilian users in China and other parts of the Asia-Pacific region before December 2012.
举一反三
- Beidou __________(导航卫星系统) is now providing global navigation and positioning services.
- In Asia, Africa, the South Pacific region, Latin America, China has launched international poverty alleviation cooperation projects for the benefit of all. （ ）
- Beidou is China's _________ satellite navigation system. A: the largest B: largest C: large
- Beidou satellite navigation system, which is independently developed in China, has been used in China’s high-speed railway.
- Beidou Satellite Navigation system is a global satellite navigation system developed by China, and it is also the _________ mature satellite navigation system. A: first B: second C: third D: fourth