A.數(shù)據(jù)庫系統(tǒng) B.數(shù)據(jù)庫 C.數(shù)據(jù)庫管理系統(tǒng) D.數(shù)據(jù)系統(tǒng)
A.測角網(wǎng) B.導線網(wǎng) C.GPS網(wǎng) D.大地測量法
A.L0=6°n+3° B.L0=3°n-3° C.L0=3°n-1.5° D.L0=3°n