Which thematic progression pattern has been used in this paragraph? The inventor of the diode valve was Fleming. He made use of the fact, first noticed by Edison, that an electric current could be made to flow across the empty space between the hot filament of an electric lamp and another metal electrode placed inside the evacuated bulb. This effect depends upon the thermionic emission of electrons from the heated metal filament. (W. P. Jolly, (1972). Electronics, p. 61)
举一反三
- An electric current is the flow of ___________. A: sort B: stream C: energy electrons D: electrons
- If _____ voltage is applied across _____ circuit, _____ electric current will flow in _____ circuit.
- Which one is wrong about Thomas Edison?( ) A: He was educated in school. B: His first job is telegraph operator. C: He had many patents. D: He invented electric light bulb.
- Which one is wrong about Thomas Edison? A: He was educated in school. B: His first job is telegraph operator. C: He had many patents. D: He invented electric light bulb.
- People decided to honor Edison when ______. A: he made his electric light B: the first invention was made C: he died more than 70 years ago D: the country realized the importance of electricity