C++是一种面向对象的程序设计语言，它充分支持面向对象思想中的三个主要特征是 ______性；_______性和_______性。
参考答案：封装、继承、多态
Lucy does her homework very ________. She is ________ than Lily.
A．carefully, much more careful
B．carefully, much carefuller
C．careful, many more careful
D．careful, a little carefuler
流传至今的《诗经》本子是( )
A．《毛诗》本
B．《鲁诗》本
C．《韩诗》本
D．《齐诗》本
