哪些方法或属性只能从封闭类中访问,甚至子类也没有访问权限?
A. protected
B. public
C. friendly
D. private
通过众所周知的接口将用户与应用程序的真正内部工作分离的实践称为 ?
A. 抽象概念
B. 封装
C. 继承
D. 多态
PHP不支持下列哪个属性范围 ?
A. static
B. public
C. final
D. friendly
How many types can claims falll into?
A. Objective
B. Subjective
C. Both A adn B