A.1:500 B.1:10000 C.1:50000 D.1:25000
A.水準(zhǔn)儀 B.經(jīng)緯儀 C.測(cè)距儀 D.全站儀
A.當(dāng)方向數(shù)不多于3個(gè)時(shí)不歸零, B.當(dāng)方向數(shù)為四個(gè)時(shí)不歸零 C.無(wú)論方向數(shù)為多少必須歸零 D.當(dāng)方向數(shù)多于4個(gè)時(shí)必須歸零