Foam extinguishes a fire mainly by().
A. cooling
B. chemical action
C. smothering
D. inerting the air
下列不属于所有者与经营者矛盾协调措施的是()。
A. 解聘
B. 限制性借款
C. “股票选择权”方式
D. 激励
Oil is supplied to the cylinder wall and () by means of mechanical lubricators.
A. the cylinder cover
B. the piston rings
C. the piston crown
D. the piston skirt
《建筑法》规定,房屋拆除应当由具备保证安全条件的建筑施工单位承担,由建筑施工单位技术员对安全负责。()
A. 正确
B. 错误