在丰富的教学实践基础上,把学习过程概括为学一思一行的统一过程的学者是我国古代的教育家_____。
参考答案：孔子
The reason _____ he refused to attend the meeting was that they didn’t give him an invitation earlier.
A．how
B．which
C．why
D．because
SDH的含义是同步数字体系。
