估计血容量最好的指标是()
A.中心静脉压
B.动脉收缩压
C.动脉舒张压
D.脉压
E.肺毛细血管楔压
参考答案:A
I think it a great honor _________ to visit your country.[ ]
A. to invite
B. inviting
C. having invited
D. to be invited
燃料油和瓦斯在点燃前严禁大量进入炉内,防止造成加热炉回火。