发动机燃油系统的功用是()
A、控制压气机放气活门
B、供给发动机清洁无蒸汽增压过的计量好的燃油
C、供应伺服油
D、操纵力矩马达
参考答案:B
_____ with high demand and serious shortage of preschools, the local government is undertaking a major
expansion. [ ]
A. Faced
B. Being faced
C. Facing
D. Having faced
起重机械()单位对起重机械安全技术状况和管理情况应进行定期或专项检查,并指导、追踪、督查缺陷整改。
A.租赁
B.购置
C.使用
D.自有