单项选择题
A.should be stopped manually
B.keeps the combustion as usual
C.would be cut off by an interlock
D.would replace the waste oil burner and keep going on
单项选择题 The solid waste was charged into the incinerator through （）.
单项选择题 If plastic film insulation becomes damaged in air conditioning system, （） may form within the film.
单项选择题 Under tropical conditions, control valves have fully opened, but the room still hot.What measures can be taken in such a case?（）