目前大容量高温高压锅炉给水泵设计工况点(最佳工况点)的总效率η值可达()。
A、50%~60%
B、60%~70%
C、80%~85%
D、90%~96%
参考答案:D
— Mum, could you buy me a dress like this?
— Certainly, we can buy ________ one than this, but ________ this.
A. a better; better than B. a worse; as good as
C. a cheaper; as good as D a more important; good as
变压器型号SJL560/10中数字”10”表示().
A.额定容量为56kV.A
B.额定电压为10kV
C.额定容量为560kV.A.
D.额定电压为lkV