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
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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
The claim "Since more and more jobs are opening in computer-related fields, colleges should require courses in computer science." is a claim of ().
A. fact
B. policy
C. value
The claim "Everyone should take a course in logic. It helps you to think clearly." is a claim of ().
A. policy
B. fact
C. value