二次燃烧主要是由于火嘴的()和()总量偏低引起的,增大对火嘴的供风量就可以避免二次燃烧。
参考答案:一次风;二次风
用所给动词的适当时态和语态填空。
1. When _____ the first man-made satellite _____(send) up into space?
2. Last year vegetables _____(grow) in the garden by Tom and he _____ (sell)
them himself.
3. She _____ (help) him with his homework tomorrow evening.
4. How many magazines _____(can borrow) in your library every week?
5. John _____ (hear) to go upstairs two hours ago.
6. -Who _____ (save) her father?
-He _____ (save) by that policeman.
7. The doctor _____ (send for) because his grandpa was ill.
8. Mooncakes _____ (make) by his mother every year . ______ your mother
_____ (make) mooncakes for you every year?
9. Some toys _____ (buy) as a presents for these children last Monday.
10. _____ paper _____ (make) of wood?
存款类金融机构从业人员对待客户采用一视同仁热情服务的态度,这遵守了服务礼仪的( )。
A.平等原则 B.自律原则C.适度原则 D.从容原则