呼吸性酸中毒
参考答案：
呼吸性酸中毒是指CO2排出障碍或吸入过多引起的以血浆H2CO3浓度升高为特征的酸碱平衡紊乱类型。
Mr Smith has a lot of business______. I know by______ that this man cannot be trusted.
A．experience; experience
B．experiences; experience
C．experience; experiences
D．experiences; experiences
主动脉粥样硬化病变最严重的部位通常是（）
A.升主动脉
B.主动脉起始处
C.胸主动脉
D.主动脉弓
E.腹主动脉
