1、 How many nonequivalent 10 - digit numbers are there?
有多少不等价的十位数?
来源:互联网
2、 The research method used for system assessment is quasi - experimental design. The experiment adopts nonequivalent - control group design.
本研究所利用系统评估的研究方法为准实验研究, 实验设计采不等组前测-后测设计.
来源:互联网
文