【单选题】用120°C的饱和水蒸气加热常温空气。蒸汽的冷凝膜系数约为2000W/(m 2 ·K),空气的膜系数约为60W/(m 2 ·K),其过程的传热系数K及传热面壁温接近于
【单选题】When goods arrival at port of destination, the shipper will issue an Arrival Notice to consignee.( )
【单选题】It’s roughly neck and __________ between us for market share.
【单选题】用120°C的饱和水蒸气加热常温空气,蒸汽的冷凝膜系数约为2000w/( m 2 ·K),空气的膜系数约为60W/( m 2 ·K),其过程的传热系数K及传热面壁温接近于( )
【单选题】— Which of the twins runs ______? — It's hard to say. They are neck and neck now. [ ]