【单选题】锅炉负荷低于25%额定负荷时应连续吹灰,锅炉负荷大于25%额定负荷时至少每()小时吹灰一次,当回转式空气预热器烟气侧压差增加或低负荷煤、油混烧时应增加吹灰次数。
【单选题】According to the author, if a person is found guilty of a crime,
A.
society is to be held responsible.
B.
modem civilization is responsible for it.
C.
the criminal himself should bear the blame.
D.
the standards of living should be improved.
【单选题】—I’m going to Venice next week. —________.Carnival will be held then.Have fun! (2013·天津,1)
【单选题】----I’m going to Venice next week. ----______. Carnival will be held then. Have fun!
【单选题】锅炉负荷大于25%额定负荷时至少每()吹灰一次。
【单选题】___deeply held ideas and beliefs that guide our thinking, language and behaviour.
【单选题】锅炉负荷大于25%额定负荷时至少每( )吹灰一次。