招标书落款署名的单位可以是______,也可以是招标单位的上级主管部门或者某一承办单位。
A.招标单位领导
B.标题中的招标单位
C.投标人
D.上级主管部门领导
参考答案:B
将两个小灯泡L1:“6V,12W”和L2:“6V,6W”串联起来接在电源上,要保证两灯泡的实际电压都不超过各自的额定电压,求电源电压的最大值.
He has got ________ to manager because of his excellent work in the company.
A.supposed
B.promoted
C.promoting
D.supposing