A. can correct by adjusting the compass card B. can correct by adjusting the compensating magnets C. can correct by changing the vessel's heading D. cannot correct
A. 数据表属于机器世界 B. 数据表中的每一行又称为一条记录 C. 数据表中每一列称为字段 D. 一张数据表包含多个数据库