Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use median Earth orbit satellites, BeiDou-1 uses satellites in （ ）.
A: Geostationary orbit
B: Circular orbit
C: Sun-synchronous orbit
D: Near polar orbit
A: Geostationary orbit
B: Circular orbit
C: Sun-synchronous orbit
D: Near polar orbit
举一反三
- How many conic sections exist in the Earth-Mars transfers? A: Earth-centered parabola orbit B: Sun-centered elliptical orbit C: Earth-centered hyperbola orbit D: Mars-centered hyperbola orbit
- The satellites of GPS orbit on six orbital planes spaced at （ ） intervals around the equator. A: 120° B: 90° C: 30° D: 60°
- Mercury complete its orbit around the sun in only ______.
- orbit [br][/br] (1.0) A: 咨询 B: 轨道 C: 排演 D: 练习
- Which of the following countries still cannot send a human in space orbit, according to the text A: Japan B: United States C: Russia D: China