建筑给水系统按用途可分为( )以及公用给水系统等几类。
A、生活给水系统
B、生产给水系统
C、消防给水系统
D、中水给水系统
E、凝结水系统

单项选择题Chinese painting and calligraphy are the _______ of traditional Chinese art. ( )A.essenceB.harvestC.foundationD.catalyst

单项选择题Praise must be used wisely to ___________students who perform up to expectations and to encourage students to perform to maximum levels. A、comply B、complete C、complement D、compliment