330MW机组对外供热投上以后,汽轮机轴向位移如何变化()。
A、向正方向增长;
B、向负方向增长;
C、不变;
D、正负方向交替变化。
参考答案:B
胡黄连不具有的功效是()
A.退虚热
B.除疳热
C.清湿热
D.生津
E.解热毒
10. is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication。 A. The virtual addressB. The subnet address C. The MAC addressD. The IP address