【单选题】Visual FoxPrO参照完整性规则不包括( )
【简答题】Access中的参照完整性规则不包括( )。 A)删除规则 B)插入规则 C)查询规则 D)更新规则
【单选题】在Visual FoxPro的参照完整性规则不包括
【单选题】During virtual reality operations, the surgeon can have a better' view of the cuts in the body because
A.
he is looking at the cuts on a computer screen
B.
the cuts can be examined from different angles
C.
the cuts have been highly magnified
D.
he is wearing 3-D glasses
【简答题】由于直流电弧比交流电弧更难以熄灭,故直流接触器多采用( )灭弧装置和( )灭弧罩。
【多选题】The surgeon can operate on