板翅式换热器是由哪些基本构件组成的,如何实现几股流体间的换热? 发布时间:2018-02-11 21:11 │ 来源:www.tikuol.com 题型:问答题 简答题 问题: 板翅式换热器是由哪些基本构件组成的,如何实现几股流体间的换热?
题型:问答题 简答题 The pen I _______ I _______is on my desk, right under my nose.A.think; lostB.thought; had lostC.think; had lostD.thought; have lost 查看答案