膜状冷凝发生的条件有哪些?
参考答案:
①饱和蒸汽和冷的壁面接触时,蒸汽在壁面上冷凝;
②壁面能被冷凝液润湿,有一层冷凝液薄层遍覆其上。
Armed with the information you have gathered, you can_______ preparing your business plan. [ ]
A. set out
B. set about
C. set off
D. set up