每分钟肺通气量与肺泡通气量之差等于()。
A.肺容量×呼吸频率
B.肺活量×呼吸频率
C.无效腔气量×呼吸频率
D.潮气量×呼吸频率
E.功能残气量×呼吸频率
参考答案:C
下列属于企业内部环境和条件的是()。
A.企业文化
B.生产技术
C.财务实力
D.人力资源管理制度
E.人力资源战略
This problem is said_____ three times at the meeting. However, they haven’t arrived at a conclusion now.
A.to have discussed
B.to have been discussed
C.having been discussed
D.having discussed