表冷器处理空气过程，风量为18000m³/h，空气t₁=25℃，t_s1=20.2℃，t₂=10.5℃，t_s2=10.2℃，水量为20t/h，冷水t_w1=7℃，水比热为4.2J/(kg·℃)，空气密度为1.2kg/m³，求冷水终温和表冷器热交换效率系数ξ₁。

A．11.7～12.8℃，0.80～0.81
B．12.9～13.9℃，0.82～0.83
C．14～14.8℃，0.80～0.81
D．14.9～15.5℃，0.78～0.79

Hearing his words, she left rather than _________ behind.

A．stay

B．stayed

C．to stay

D．staying