情景对话。

— Is this your school computer room? 1.___________________________ 　　 

— 2.__________________________ 　　 

— What are they doing? 　　 

— 3._________________________ 　　 

— 4._________________________

— Yes, we work here once a week. 5.____________________________

A. Where are they?

B. We are all keen to learn modern techniques.

C. Do you often work here?

D. They are learning to use computers.

E. They are students of the Russian department.

F. Who are these people?

G. We are working hard.

某疗养院采用有效容积系数η=0.9、总容积V=50000L的储热水箱配快速式水加热器集中供应60℃热水，每天定时供热水3h，冷水温度为10℃，热水密度均为0.992kg/L，热媒为0.4MPa的饱和蒸汽，热焓为2749kJ/kg，凝结水的热焓为637kJ/kg。若该疗养院热水用水的基本情况见表3—16，则最大蒸汽量G应为（）。表3-16

器具数量/个40℃热水1小时用量/L浴缸（病房内）300300淋浴器（病房内）300150洗脸盆（病房内）30020名称数量/人60℃热水用水量/[L/（人·d）]病人1000120

A．3890kg/h

B．6195kg/h

C．5108kg/h

D．2999kg/h