China’s BeiDou Navigation Satellite System, whose positioning ________ will reac

题干

China’s BeiDou Navigation Satellite System, whose positioning ________ will reach 2.5 meters by 2020, will soon provide services for more countries.

A．accuracy	B．category
C．function	D．reference

上一题下一题 0.65难度单项选择更新时间:2019-01-26 08:46:33

小学学科试题库

初中学科试题库

高中学科试题库