精馏塔内各层塔板的流动状态和物性相同,所以各层塔板的传质效率也相同。
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1. What does it()like? (looks/look)2. Could you() me your ID? (show/see)3. Have you()a contact telephone number? (got/ get)4. We will () you immediately if we have any information about your lost property. (contact/ask)5. Please give me your name,address,telephone number,especially the time and place you()your property.(lose/lost)