如何对发电机组与电网密切相关的设备进行管理？

Look, she is ____________ a picture book in the room. [ ]

A. reading

B. watching

C. seeing

D. looking

黄帝的乐舞是（）

A.《大韶》

B.《大章》

C.《云门大卷》

易切不锈钢属于（）体不锈钢。

A.马氏体

B.珠光体

C.奥氏体

D.结晶体

To it we owe the existence of the motor-car, which has replaced the private carriage drawn by the horse. To it we owe the possibility of flying. It has changed the methods of warfare on land and sea. This kind of oil comes out of the earth.

急性肾炎（）

A．大红肾

B．大白肾

C．继发性颗粒固缩肾

D．原发性颗粒固缩肾

E．瘢痕性固缩肾