Anything I can do for you? B. Hello,can I help you? C. What can I do for you? D. Excuse me a moment,please.
A. 梯度风 B. 地转偏差 C. 热成风 D. 惯性风
A. 阀芯阀座磨损严重 B. 阀门定位器输出总是在最大值 C. 阀芯阀座间有异物卡住 D. 阀杆太短
A. 左心室压力增高 B. 肺动脉压力增高 C. 主动脉狭窄程度 D. 右心房负荷加重 E. 左心房增大