Match the environmental problem from the box with the correct definition 1-5. flooding drought smog extinction leak A violent wind that destroys buildings and trees: hurricane An excess of water which submerges roads and buildings: ______
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物料经过高温干燥后已达到了规定的含水率,因要包装,必须再进行冷却,但选择冷却温度时应防止物料降温后吸湿返潮。已测得干燥机出口空气中的水蒸气分压为5.10kPa,请判断下列哪几种冷却温度不会产生返潮,是可以采用的
A. 40℃,饱和水蒸汽压7.375kPa
B. 35℃,饱和水蒸汽压5.623kPa
C. 30℃,饱和水蒸汽压4.242kPa
D. 25℃,饱和水蒸汽压3.167kPa
一个搅拌槽反应器,出口与进口物料的焓流量差值为17110MJ/h,它的反应热(吸热反应)折算为1960MJ/h,搅拌器功率75kW,反应器绝热层的表面积120m2。如果以搅拌器功率的50%转化为热量,反应器绝热后外表面允许的热损失为186W/m2计,反应器需要外界提供的热量(MJ/h)为下列哪个数值
A. 15095
B. 19125
C. 19015
D. 19285
工程设计中一般要求水平管中的气—液两相流的流型应是下列哪一组流型
A. 气泡流或柱状流
B. 柱状流或环状流
C. 环状流或分散流
D. 环状流或气泡流
Match the environmental problem from the box with the correct definition 1-5. flooding drought smog extinction leak A violent wind that destroys buildings and trees: hurricane The escape of a dangerous substance into the local environment: ______