A.數(shù)據(jù)庫(kù)系統(tǒng) B.數(shù)據(jù)庫(kù) C.數(shù)據(jù)庫(kù)管理系統(tǒng) D.數(shù)據(jù)系統(tǒng)
A.測(cè)角網(wǎng) B.導(dǎo)線網(wǎng) C.GPS網(wǎng) D.大地測(cè)量法
A.L0=6°n+3° B.L0=3°n-3° C.L0=3°n-1.5° D.L0=3°n