车辆检修制度
参考答案：通过检修方式确定检修计划、类别及等级、检修结构及周期、检修标准及检修组织等一系列内容。
Mike's father, as well as his mother, commanded that he _____ home.
[ ]
A. stayed
B. could stay
C. stay
D. has stayed
支撑面每次接触患者时，检查其（）
A.适合程度及功能
B.完整性
C.是否有效
D.有效期
