连续测定呼气中CO浓度的意义是（）
A.能反映动脉血CO分压，可作为肺泡通气的非创伤性指标
B.无意义
C.反映血管张力
D.反映心排
参考答案：A
气体灭火系统维护管理中年度检查的内容和要求分别有哪些？
A．Our products cannot compete on the international market because of their higher prices.
B．Our products exhibit greater competitiveness even though they lack advanced technology.
C．Advanced technology will increase our expense to compete on the international market.
D． Advanced technology contributes to the excellence and competitiveness of our products.
