锅炉蒸发量不变，若给水温度降低，将使过热器温度（）。

A、降低；

B、升高；

C、不变。

Automotive accidents are one of the leading causes of death in children. Child safety advocates argue that harsh penalties should be imposed on drivers who fail to place children under 30 pounds in rear-facing children’s seats in the rear of the car whenever a car is in motion. Such penalties, they argue, will help save children’s lives.All of the following statements support the argument of the child safety advocates EXCEPT:（）

A. The rear seats of a car are safer for all passengers, both adults and children, in the event of an accident.

B. Studies have shown that children in rear-facing seats have been shown to sustain less serious injuries in accidents than children in front-facing seats.

C. Studies have shown that children under 30 pounds can sustain serious injuries in even minor accidents if they are not properly restrained.

D. Studies have shown that children between 60 and 90 pounds are safest in a car when using both a seat belt and a properly sized booster seat.

E. Some drivers will not abide by regulations unless they are forced to do so by the threat of harsh penalties.