A.短波2mm/20mB.長波高低和軌向5mm/300mC.短波3mm/20mD.長波高低和軌向10mm/300m
A.一次布網(wǎng)B.二次布網(wǎng)C.分時觀測D.同時觀測
A.CP0B.CPⅠ C.CPⅡD.CPⅢ