A:客观物质性
B:主观能动性
C:社会历史性
D:直接现实性
已知M=∫011x+1dx,N=∫0π2cosxdx, 由如右程序框图输出的S为
I don't know if the book is worth ____ (read).
We all know that it is very important for us to learn ____ (口语的) English.