Which of the following statements about ren are true?
A、Ren is at the core of Confucius teachings.
B、Ren is a concept that is easy to define precisely.
C、Ren is a deep concern for the welfare of others.
D、Ren is the highest moral principle.

下列哪些属于女士优雅的坐姿？

未知题型下列哪些属于女士优雅的坐姿？

一个512KB的存储器（按字节编址），其地址线根数是（）

未知题型一个512KB的存储器（按字节编址），其地址线根数是（）

A、 B、 C、 D、

单项选择题
A、
B、
C、
D、