1. [单选题]按我国有关规范对转速禁区的规定，下述讲法不恰当的是( )。
A. 禁区在转速表上用红色示出
B. 在操纵台上用示告牌指示
C. 禁区不得超越
D. 禁区内不允许长期运转
2. [单选题]The correct procedure for giving an auxiliary boiler a bottom blow, is to begin .
A. when the boiler has been secured long enough for most solids to settle
B. when the boiler has been cooled to ambient temperature
C. only after raising the water level to within 0.5 inch of the high water cutout only
D. after bypassing the low pressure
