让发电机原理走出实验室,给人类带来新的光明的“普罗米修斯”是[ ]
A、
H.R.Hertz
B、
M.Faraday
C、
T.A.Edison
D、
W.Siemens
答案:C
深化拓展技术监督工作,切实发挥技术监督对状态检修的“()”作用。
A.监督
B.评价
C.保驾护航
D.促进
Do you know()at the bus stop?
A.whom they are waiting for
B.who they are waiting
C.whom are they waiting for
D.who are they waiting