育才学校新教学楼实际投资180万元,比计划节约了20万元,节约了百分之几?
20÷(180+20),
=20÷200,
=0.1,
=10%;
答:节约了10%.
试述我厂锅炉补给水处理的联接及运行方式?
飞机上有几台计算机用于燃油量的指示().
A.2个FQIC,2个FLSCU
B.1个FQIC,2个FLSC
C.2个FQIC,1个FLSCU
D.1个FQIC,2个FLSCU