A.經(jīng)緯線網(wǎng)和方里網(wǎng) B.經(jīng)線網(wǎng)和緯線網(wǎng) C.經(jīng)線網(wǎng)和方里網(wǎng) D.經(jīng)緯線網(wǎng)和公里格網(wǎng)
A.200 B.300 C.400 D.500
A.2%B.3%C.4%D.5%