
蒸汽加热的重沸器的自动调节方案有两种:1.调节蒸汽流量;2.调节重沸器出口凝液管路上的控制阀的开度,来调节重沸器的有效()。
A . A、换热效果
B . B、换热面积
C . C、换热方式
D . D、冷却面积


A . A、换热效果
B . B、换热面积
C . C、换热方式
D . D、冷却面积
Ⅱ Listen to the passage again and complete the following missing information.
1. In Hollywood, everybody wants to be (1) ___________________________. Nobody wants to be (2) _________________________.
2. Parents pay for wasteful grand parties, expensive cars, and (3) _________________. When every dream can come true, kids don't learn (4) _____________ anything because they have everything.
3. Parents buy (5) __________________ for their children because they have no time to give it themselves. Amanda's mother employs (6) ___________________, a bodyguard, a singing (7) _____________ and a (8) _____________ to look after all her 15-year-old daughter's needs.
4. Hollywood has always been the (9) ________________. The kids there live (10) _____________ where money, beauty and pleasure are the only gods.