GPS主控站主要有哪些功能？

A. 副控站

B. 注入站

C. 协调站

D. 修正站

A、监控卫星状态，向卫星发送控制指令

B、将导航电文注入GPS卫星

C、管理、协调地面监控系统各部分的工作

D、卫星维护与异常情况的处理

A. 监测站

B. 注入站

C. 用户设备

D. 主控站

A、监控卫星状态，向卫星发送控制指令

B、将导航电文注入GPS卫星

C、接收卫星数据，采集气象信息，并将所收集到的数据传送给主控站

D、卫星维护与异常情况的处理

Lomborgrgues tht globl wrming______.my be something beneficil to humn beingsB．shLomborgrgues tht globl wrming______.my be something beneficil to humn beings B．should beddressed by environmentl scientists C．hs ignited heted controversymong scientists D．is importnt both sttisticllynd environmentlly

A．may be something beneficial to human beings

B．should be addressed by environmental scientists

C．has ignited a heated controversy among scientists

D．is important both statistically and environmentally

For a country that has long proclaimed its tongue the language of love, of global diplomacy and the rights of man, the threat is taken seriously. Few here complained when a francophobic US senator recently described French as “a near-forgotten” language; many realize that 47 something is done, he could very soon be right.