车刀上和工件上加工表面相对着的是副后刀面。( )
参考答案：错
Only then ___ that he had made a mistake.
A．he realized
B．did he realized
C．realized he did
D．did he realize
下面哪些算式符合乘法分配律[ ]
A．125×25×8
B．452×10+1= 452×（10+1）
C．72×101=72×100+72
D．18×26+82×26=（18+82）×26
