答案:C
Don't go out to play. You _____ finish your homework first. [ ]
A. must
B. have
C. had
D. had to
在质量方面的指挥和控制活动,通常包括制定质量方针和目标及( )、质量控制、质量保证和质量改进。
A.质量策划
B.质量计划
C.质量管理
D.质量体系