A. added B. related C. contributed D. compared

海可本呵A. A9D2 B. RDB2 C. AD92 D. 3D92

Meaning is a relatively stable element in a language compared with spelling.（)

● A group of related fields is called a （75) . （75）A. data B. file C. record D. database

VFP中的SET RELATION 关联操作是一种（)A.逻辑连接B.物理连接C.逻辑顺序D.物理排序

When comparing the air with 50% of relative humidity with the air with 100% of relative hu

实现AD转换的核心环节是：A.信号采样 量化和编码 B.信号放大和滤波 C.信号调制和解调 D.信