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

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问题单项选择题

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%

答案

参考答案：D

选择题

— 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

单项选择题

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