用逐板计算法求理论板层数时,为什么用一次相平衡方程就计算出一层理论板?
参考答案:
使用一次相平衡方程,就意味着物料达到一次气液平衡,就相当于越过一块理论板。
根据下面对话中的情景,在每个空白处填入一个适当的语句,使对话恢复完整
A: Tomorrow is Sunday. Do you have any plans?
B: 1 The newspaper says there will be a dolphin show there at 3:00 pm.
A: Sounds great! I also like dolphins. Can I go with you?
B: Of course you can.
A: 2
B: How about going by bicycle?
A: Oh, my bike is broken(坏的).
B: 3 Then we can walk there.
A: OK. 4
B: Let us meet at the gate at one. 5
A: OK. See you.
B: See you then.
如图,质量为m的小球用细绳悬于O点且在竖直平面内做圆周运动,到达最高点时速度为v,则此时绳子的张力为______.(绳长为l)