题目内容

在Access中,表和数据库的关系是_______。

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二极管整流电路利用了半导体二极管的（）

A. 电流放大特性
B. 电压放大特性
C. 单向导电的特性
D. 反向击穿的特性

When Michael was a little boy, his mother read him numerous stories about pole-vault.

A. 对
B. 错

Michael's training program was carefully monitored by his father.

A. 对
B. 错

Michael's parents never asked him to do any housework.

A. 对
B. 错