What is the name of an electronic document?
(1)( ) electronic record
(2)( ) acknowledgement of receipt
【C7】
A.modern electronic equipment
B.modern electronic equipments
C.the modern electronic equipments
D.a modern electronic equipment
Practical application of this principle resulted in______.
A.new electronic instruments for planes
B.a radio directing and ranging device
C.new radio sets for RAF bombers
D.an electronic detecting device