下列 for循环语句将输出: 0 1 2 0 1 2 0 1 2for( i=1; i<=9; i++ )printf("%2d", );

A center which accepts stray dogs sent by warm-hearted people.
B. A center where dogs are taken care of when their owners are away or at work.
C. A center where dogs are trained according to their owners' requirements.
D. A center where a dog can do whatever it likes so long as its owner has paid.

A. Dog Ma seems to have a long history.
B. Dog Ma seems to be a state-owned business.
C. Dog Ma seems aimed at people with a good income.
Dog Ma seems to be located in the country.

A. 装配是一个管理零件几何体的指针集合。
B. 大型装配会消耗很大的电脑内存资源。
C. 装配需要较低的电脑资源。
D. 装配就是虚拟装配。

A. *.ptc
B. *.prt
C. *.dwg
D. *.asm