孔口管的长度在根据水压和围岩性质在探放水设计中明确规定。
参考答案:对
5位患者,血压分别如下,哪位患者不宜拔牙()
A.140mmHg/90mmHg
B.180mmHg/110mmHg
C.120mmHg/85mmHg
D.170mmHg/95mmHg
E.125mmHg/80mmHg
( ) is a property of object-oriented software by which an abstract operation may be performed in different way in different classes.
A.Method
B.Polymorphism
C.Inheritance
D.Encapsulation