---Do you know what Tom does all day?

---I know he spends at least _______ time watching TV as he does spend doing his lessons.

A．more　　　　

B．as much

C．much

D．as more

下列关于空调用水冷式冷水机组的连锁控制启动运行顺序为( )。

A．冷冻水泵、冷却水泵、冷却塔、冷水机组
B．冷却水泵、冷冻水泵、冷却塔、冷水机组
C．冷却塔、冷却水泵、冷冻水泵、冷水机组
D．冷水机组、冷却塔、冷却水泵、冷动水泵