问题
单项选择题
（）is not a component of GPS.
A.He space component
B.Control component
C.User component
D.Alarming component
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
（）is not a component of GPS.
A.He space component
B.Control component
C.User component
D.Alarming component
参考答案：D